Logos of the Legacy Companies of Chevron
This is an attempt to identify the many companies that now make up Chevron. Any comments, pictures or advise would be appreciated. This was created by researching the internet and other written sources. Some of it could be wrong because of the different ways that companies are acquired and mistakes make by me.
Chevron

Frederick Taylor and Demetrius Scofield formed the California Star Oil Works through aquisition of the Los Angeles Oil Company, but George Loomis, Charles N Felton, and Lloyd Tevis, who on September 10, 1879, acquired California Star Oil Works, and formed the Pacific Coast Oil Company (PCO) is usually regonized as the beginning of Standard of California.
Red Crown was the brand that was originally used by Rockefeller Standard Oil Trust. Many of the Baby Standards used this logo to market their products.
In 1931, after the merger of PCO and Standard Oil Company (California) the now familiar Chevron logo appeared in its original form with the STANDARD name. This was the first logo adopted by Standard Oil of California.
This logo was used in the early 1960's through the 1970's
This became the logo in the early 1970's up to the the current logo that was adopted when the name was changed from Chevron Texaco to Chevron
This is the current logo being used by Chevron
Gulf Petroleum
Gulf 1920-1932 Gulf Refining Company of Texas was chartered 10 November 1901. The Gulf Port Arthur Refinery was build to process and market oil from the Spindletop field. The company became the Gulf Oil Corporation January 1907. A 400 mile long pipeline was built from their Glenn Pool field in Oklahoma to its Port Arthur Refinery. A company called Gypsy Oil was formed to handle the field. On 5 March 5 1984, the Gulf board voted to sell the company to Chevron for $13.2 billion. This Gulf sign was introduced on 1920.
Gulf 1936 - 1960. This Gulf sign was used from 1936 to the sixties.
Gulf 1960
Texaco
Texaco began as the Texas Fuel Company, founded in 1901 in Beaumont, Texas by Joseph S. Cullinan, Walter Benona Sharp and Arnold Schlaet upon discovery of oil at Spindletop.
Texaco became the brand of Texas Fuel Company, which began in the Spindletop boom of the early 1900's. This Gasoline Filling Station sign is from the teens. In March 1901, just two months after the first gusher at Spindletop, oil man Joseph "Buckskin Joe" Cullinan teamed with financer Arnold Schlaet to form the Texas Fuel Company. 1920-1936.
1959 the Texas Company officially changed its name to Texaco, Inc. On October 16, 2000, Texaco merged with Chevron Corporation to form Chevron Texaco. This logo was used 1936-1959.
The Texaco logo was used from 1959-1980.
In December of 1902 a salesman saw the name "Texaco" in the cable address of the company's New York office, and for the first time used the term as a product name. The first refinery opened in 1903 at Port Arthur, and 19 year old refinery worker J. Romeo Miglietta suggested adding a T to the Texas star for a company trademark, using the green and red from the flag of his native Italy. This was the logo at the time of the merger.
Union of California
Some of the logos used by Union Oil. This picture belongs to Dick Bennett who matintains a web site at oldgas.com/
In 1890, Lyman Stewart and Wallace Hardison combined their oil assets with those of Thomas Bard to form the Union Oil Company of California. The company was incorporated on October 17, 1890, in the small town of Santa Paula, located about 100 miles northwest of Los Angeles. This logo was used before 1950
The 76 brand was introduced during the depression of the 1930's.
A later 76 logo
Caltex Petroleum
Caltex before 1947
Caltex 1947-1987
Caltex name was derived from California and Texas Company. The joint venture was formed in 1936 shortly after the discovery of the Awali Field in Bahrain. Texas Company was in need of crude for its worldwide distribution network and Socal need a market for the Bahrain crude. The joint venture was a success from the very beginning, especially with the growing production of oil from its refineries in the Middle East and Asia.
Caltex logo that is currently being used.
Companies that a Legacy Company was the owner or partial owner. The following section is for companies that have been purchased in the past by one of the legacy companies. While searching for logos, I ran across references to companies that are possible mergers with one of our legacy companies. So far I have not found enough back up data on some of them to say for sure that these companies were actually merged. Any help would be appreciated.
Chevron Companies
Standard Oil of California, or SoCal, bought a small New Jersey oil refiner and marketing company shortly after WWII and renamed it the California Oil Company. The gasoline brand became known as Calso in the northeastern US. In 1958 all Calso stations were changed over to Chevron stations.
Standard of Kentucky was purchased by Standard of California in 1961.
Standard of Kentucky logo could be a flag.
Chevron bought the offshore Gulf of Mexico properties of Tenneco
  Chevron Resources had a 50% interest with Manville Corporation from 1979-1994. The company operated the world's only viable platinum and palladium mines out side of Russia and South Africa.
American Gilsonite The company was formed in 1888. By the 1920s, Gilson's company became part of Barber Oil Company. American Gilsonite Company was formed in 1946 when Chevron and Barber Oil assumed joint ownership of the Gilsonite operations. Between the 1950s and 1980s, Chevron invested millions of dollars in research, pilot plants and product testing. During the 1970s oil price shocks, research was concentrated on refining energy products from Gilsonite. By the 1980s, Chevron had become the sole owner of AGC and broadened its development efforts to non-energy markets.

In 1991, Chevron divested its ownership in AGC. A newly-independent American Gilsonite Company emerged.
Atlas Energy Atlas Energy, Inc. was acquired by Chevron Corp. on Thursday, February 17, 2011.

Obtained interest in over 8,500 gross natural gas wells located in the following regions: Appalachia region of western Pennsylvania, eastern Ohio and southwestern New York; New Albany Shale region in southwestern Indiana; Northeastern Tennessee; Niobrara region in northeastern Colorado;

Pasotex Petroleum Pasotex Petroleum was purchased to obtain outlets in the area of New Mexico and Colorado in 1926. A subsidiary of Standard of Texas
 Standard Oil of Texas SOTEX was merged into Chevron Corporation in 1961
 

Standard Oil of California took over the marketing  outlets of Signal Oil and Gas 8 August 1947. Signal kept the drilling and production. The brand name was used until the sale to Humble Oil Company  in 1965. 

Argo Petroleum Corp. Chevron was mentioned as purchasing this company, but nothing else was found.
Cliffwood
Energy Co		 Chevron was mentioned as purchasing this company in 1988, but nothing else was found.
Continental Eastern Corp Chevron was mentioned as purchasing this company, but nothing else was found.
Continental Western Corp Chevron was mentioned as purchasing this company, but nothing else was found.
Floyd Karsten Chevron was mentioned as purchasing this company, but nothing else was found.
Garfield County Exploration Chevron was mentioned as purchasing this company, but nothing else was found.
GCO Minerals Chevron was mentioned as purchasing this company, but nothing else was found.
Gemco, Inc. Chevron was mentioned as purchasing this company, but nothing else was found.
Hallwood
Energy Co		 Chevron was mentioned as purchasing this company, but nothing else was found.
HEC La Plata LLC Chevron was mentioned as purchasing this company, but nothing else was found.
HEP Pure Acquisition LLC Chevron was mentioned as purchasing this company, but nothing else was found.
Huntington
Beach Co		 Chevron was mentioned as purchasing this company in 1987, but nothing else was found.
Inter-national Paper Gas Pipeline Co Chevron was mentioned as purchasing this company, but nothing else was found.
IP Petroleum
Co, Inc		 Chevron was mentioned as purchasing this company, but nothing else was found.
Jonnell Gas Company Chevron was mentioned as purchasing this company, but nothing else was found.
Kimmerer Oil Chevron was mentioned as purchasing this company, but nothing else was found.
KNDA Mobil had a well named KNDA 44 near Tulare Lake Field????
La Plata Associates LLC Chevron was mentioned as purchasing this company, but nothing else was found.
Leidy
Prospecting Co		 Chevron was mentioned as purchasing this company in 1953, but nothing else was found.
Lomita Gasoline Co Chevron was mentioned as purchasing this company, but nothing else was found.
Long-Bell Petroleum Co Chevron was mentioned as purchasing this company, but nothing else was found.
Lorena Oil Co Chevron was mentioned as purchasing this company, but nothing else was found.
McRae Oil &
Gas		 Chevron was mentioned as purchasing this company in 1983, but nothing else was found.
Mt. Diablo Corp. Chevron was mentioned as purchasing this company in 1964, but nothing else was found.
Murvale
Company		 Chevron was mentioned as purchasing this company in 1953, but nothing else was found.
NAFCO Oil & Gas Chevron was mentioned as purchasing this company, but nothing else was found.
Noyly Develop-ment
Co		 Chevron was mentioned as purchasing this company, but nothing else was found.
Oil & Gas Properties
Company		 Chevron was mentioned as purchasing this company, but nothing else was found.
Pioneer Oil Co Chevron was mentioned as purchasing this company, but nothing else was found.
Producers Oil
Co		 Chevron was mentioned as purchasing this company in 1917, but nothing else was found.
PRS Offshore
Inc		 Chevron was mentioned as purchasing this company, but nothing else was found.
Quinoco Petroleum inc Chevron was mentioned as purchasing this company in 1989, but nothing else was found.
R.T. Collier
Corp		 Chevron was mentioned as purchasing this company in 1957, but nothing else was found.
Rutherford-
Moran Oil		 Merger in Thailand in 1999 that was finalized in 2004
Saxon Oil Co Chevron was mentioned as purchasing this company in 1989, but nothing else was found.
Sumac Petroleum Chevron was mentioned as purchasing this company in 1962, but nothing else was found.
Sunburst Exploration Chevron was mentioned as purchasing this company in 1993, but nothing else was found.
T & L Oil Chevron was mentioned as purchasing this company in 1961, but nothing else was found.
Tital Resources Chevron was mentioned as purchasing this company, but nothing else was found.
TOC - Gulf of Mexico
Federal Offshore		 Chevron was mentioned as purchasing this company, but nothing else was found.
Wolfson Oil Chevron was mentioned as purchasing this company, but nothing else was found.
Texaco Companies
Acquiring California Petroleum Corporation in 1928 put Texaco in all 48 states. Orginized it as Texas Company of California until 1941 when it became The Texas Company.
In 1931 Texaco bought the Indian Refining Company, acquiring rights to the Havoline brand name.
Havemeyer Oil Company was renamed Indian Refining Company.
Havemeyer Oil Company developed a unique cold-filtration process and blending package for oils and names it Havoline. The patent was registered on 8 December 1906
Indian Refining Company logo in 1922
Regen oil Company Regent Oil Company of UK. Texaco merged its UK operations with Trinidad Leaseholding Corporation in 1947 to form Regent Oil Company. Texaco them transferred its interest to Caltex.
McColl Frontenac Oil Co. (BC) Ltd was a Canadian Company. Texaco started buying their stock in 1936 and by 1940 controlled the board. In 1959 the McColl Frontenac brand was replaced with Texaco.
Paragon Oil Texaco  

Paragon Oil Company was established by Henry Irvin, Robert Benjamin, and Arnold Schwartz in New York City early in the twentieth century. They mainly distributed fuel oil in the northeastern United States. Paragon was sold to Texaco in 1959. Current logo of this company.
Mohawk was a California-based discounter and became a secondary brand for Tidewater Associated. Getty took control of Tidewater Associated in 1956. Getty was purchased by Texaco in 1984
In the early 1900's a group of well operators formed the Associated Oil Company to transport oil to their refinery in Martinez, California. In 1936 Associated joined Tidewater Oil, makers of Tudol and Veedol, to form the Tidewater Associated Oil Company, a nationwide firm. Associated's trademark, flying wings attached to a letter "A" for Associated, became the new company's national marketing emblem.
While Tidewater Associated was becoming one of the country's major oil companies, J. Paul Getty began buying stock in the 1930 and ultimately controlled the company by 1951. In 1966 Phillips 66 bought out the west coast stations, and the east coast became Getty Oil stations, bringing an end to the Flying A brand by 1970.
Texaco bought Getty in 1984, but Pennzoil sued because Texaco had made a contract to buy Getty after Pennzoil had already entered into a contract with Getty. Texaco lost and was fined US$10.53 billion, the largest civil verdict in US history. In the end, only some of the refineries changed hands, and Getty continued to exist. Getty gas stations survived the buyout. At one time, some were co-branded with Mid-Atlantic convenience store chain Uni-Mart, which now sells its own brand of gasoline. In November 2000, Lukoil bought Getty Marketing, which had been spun off from Getty Realty, and in 2003 converted Getty stations to Lukoil for legal reasons.
Skelly was obtained by Getty in when Tidewater Associate Oil was added to the Getty Company.
Galena Signal Oil Company Galena-Signal Oil Company sold to Standard Oil in 1878. It became an independant when the Rockefeller empire broke up in 1911. In 1931 Valvoline took over the company. They built a refinery in Houston, Texas around the turn of the century.  Texaco bought the refnery and apparently the name. In 1924 Texaco moved into Ireland as Galena-Signal.
Star Enterprise In 1988 Texaco and Saudi Refining agreed to form a joint venture known as Star Enterprise in which Saudi Refining would own a 50 percent share of Texaco's refining and marketing operations in the eastern United States and Gulf Coast
Motiva In 1997 Shell and Texaco   merged their marketing and refining operations in the eastern United States and Gulf Coast . The operations in the western and midwestern United States were merged into a company called Equilon. The Star Enterprise operation and Shell's eastern and southeastern operations were merged into a company called Motiva. After Chevron Texaco merger in 2001 Shell and Saudi Refining bought Texaco's interests in the joint ventures.
 White Fuel Co Texaco bought White Fuel Corporation in 1962.
Seaboard Oil Co Texaco bought Seaboard Oil Company in 1958. They acquired mineral rights in the Rocky Mountains and South America.
Trinidad Oil Company Regent Oil Company which was a joint venture with Texaco in the UK purchased the Trinidad Operations giving them the Pointe-a-Pierre Oil Refinery in 1956.
TXL Oil Corporation TXL Oil Corporation was purchased by Texaco In 1962. This transaction gained them mineral rights to two million undeveloped acres in West Texas.
Eagle Point Works Texaco purchased the Eagle Point Works in 1947. The Eagle Point Works Refinery near Camden, New Jersey became a major refinery for Texaco. I think that Sunco now owns the refinery.
Superior Oil Company of Venezuela Texaco purchased these assets in 1964
Texas Coal and Lampblack This company was purchased in 1901 shortly after the inception of Texaco. Cant find anything on this purchase.
RMR Inc Texaco purchased this asset in 1989. Nothing else has been found.
Tana Production Corp Texaco purchased this asset in 1989. Nothing else has been found.
Alterio Resources Ltd. Texaco purchased this asset, but nothing else has been found.
Canadian Reserve Texaco purchased this asset, but nothing else has been found.
Kern Oil California Texaco purchased this asset, but nothing else has been found.
Lewis
Production		 Texaco purchased this asset, but nothing else has been found.
PPC Oil & Gas Corp. Texaco purchased this asset, but nothing else has been found.
Wellington Oil Co. Texaco purchased this asset, but nothing else has been found
Minnehoma Oil Co Original Company owned by father of JP Getty.
Mission Corporation Standard of NJ set up this company to manage Tidewater. JP Getty started buying shares of stock in 1937 and got control 1953.
Pacific Western Oil Corp. JP Getty started buying shares of stock in the 1930's and got control in 1935
Basin Petroleum Getty purchased this company in 1980. Nothing else has been found on this transaction.
Fargo Oils Ltd. Getty was mentioned as purchasing this company. Nothing else has been found on this transaction.
Mission Develop-ment Company Getty was mentioned as purchasing this company in 1967. Nothing else has been found on this transaction.
Monday Oil Co. Getty was mentioned as purchasing this company in 1946. Nothing else has been found on this transaction.
National Fidelity Life Insurance Company Getty was mentioned as purchasing this company in 1982. Nothing else has been found on this transaction.
Penntex
Petroleum &
Land Co.		 Getty was mentioned as purchasing this company in 1980. Nothing else has been found on this transaction.
Reserve Oil &
Gas Company		 Getty was mentioned as purchasing this company in 1980. Nothing else has been found on this transaction.
Rock Hill Oil Co. Getty was mentioned as purchasing this company in 1955. Nothing else has been found on this transaction.
RVO Petroleum Co. Getty was mentioned as purchasing this company in 1981. Nothing else has been found on this transaction.
Black Diamond Methane, LLC Black Diamond Methane, LLC, a joint venture with Boeing and Texaco which explored for clean burning coalbed methane reserves in the Puget Sound Area in 1993
Deutsch Erdol A.G.
Texaco purchased the majority interest in the West German oil company Deutsch Erdol A.G. in 1966
Neches Butane Products Company
The Neches Butane Products Company, which manufactured butadiene, an essential ingredient in synthetic rubber. This was a government owned company formed during World War I This enterprise gave Texaco its start in the infant petrochemicals industry, and after the war it purchased a 25 percent interest from the Federal Government in the Neches Butane plant. Texaco acquired full ownership of this operation in 1980.
Jefferson Chemical Company
Texaco increased its interests in petrochemicals in 1944, when it formed the Jefferson Chemical Company with the American Cyanamid Company. Texaco later bought out American Cyanamid's interest in this venture and then merged it with its newly formed Texaco Chemical Company in 1980.
Gulf Oil Companies
Poly Gas dates back to the late 1910 or early 1920's and became part of Wilshire Oil of Los Angeles around the time of the depression. Wilshire became part of Gulf Oil in 1957.
Wilshire Oil of Los Angeles Wilshire Oil of Los Angeles
Sunset Oil Logo Sunset Oil Company was sold to Wilshire Oil Company in 1958. Wilshire Oil Company was sold to Gulf Oil in 1957
Kewanee Oil Company Kewanee was initially the Enterprise Transit Company which was mainly in oil transport, but later expanded into exploration production and refining. The company was named the Kewanee Oil and Gas Company in November 1908 in the town of Kewanee, Illinois. Kewanee Oil Company was purchased by Gulf Oil in 1956.
Gulf bought 20% interest in British America Oil Company after World War II. In 1956 Gulf obtained 58% interest. British America Oil Company logo 1948-1967
In 1969 this logo was replaced with the Gulf logo. Chevron sold its 60% interest in Gulf Oil Canada Limited in 1985.

Royalite Oil Company, Ltd. was founded in Calgary, Alberta in 1921 as one of Imperial Oil's exploration affiliates. They sold it in 1949 and was later acquired by the British-American Oil Company in 1962. Royalite retained its identity for several years. The Royalite brand began to be replaced by the orange and blue Gulf logo soon after BA and Royalite were merged into Gulf Oil Canada in 1969.
Anglo-Canadian was purchased along with Shawnigan Chemical Limited, Purity 99, Red Head , and Royalite Oil Company in 1963
Purity 99 was purchased along with Shawnigan Chemical Limited, Purity 99, Red Head, Anglo-Canadian, and Royalite Oil Company in 1963
Not much was found on this company other that it was acquired by British American in 1958. Red Head brand continued to market, but was later changed to Royalite in the 1960's. Royalite was ultimately changed to Gulf Oil. This is not the same company that marketed in Ohio.
Mene Grande Oil Mene Grande Oil was a company  owned by Gulf Oil to do business in Venezulea
Vengref Vengref was a joint venture refining operation (Gulf 2/3, Texaco 1/3) that was a concession to Pedevsa for the continued Mene Grande operation.  It became a financial success and ultimately a relatively complete refinery., including an FCC and an HF Alkylation unit.
 Shawnigan Chemical Limited Shawnigan Chemical Limited was purchased by Gulf Oil along with Purity 99, Red Head, Anglo-Canadian, and Royalite Oil Company in 1963
 a Superior 400 was the Superior Oil Company of Des Moines Iowa. They had about 150 stations in 8 Midwestern states.  Gulf bought them in 1971  
Pittsburg & Midway Coal Mining Company Pittsburg & Midway Coal Mining Co was purchased in October 1963 by Gulf Oil. In 2007 Chevron merged this company with Molycorp to become Chevron Mining
Texas New Mexico Pipeline

Texas New Mew Mexico Pipe Line Company was a Gulf operation in which one of our retirees was employed in ages past.  He located a logo (letterhead) in his files.

Spencer Chemical Company

Gulf bought the Spencer Chemical Company, liquidated by the Spencer Foundation, in 1964(?).  After the Gulf purchase Spencer Chemical Corporation name disappeared.
Onyx Chemical Company
PITTSBURGH, Dec. 27, 1982— The Gulf Oil Corporation said it had sold the assets of its subsidiary, Millmaster Onyx, to the  Millmaster Onyx Group Inc., a new company based in New York.
Warren Petroleum Gulf Oil Company purchased Warren Petroleum in 1956

Paragon was a company headquartered in Toledo, Ohio. They operated from 1888 to 1929 until being purchased by Gulf Oil Company. Paragon's facilities including 344 bulk and service stations in Ohio, Indiana and Michigan and a refinery at Toledo.

 
Cenard Oil &
Gas Company		 Cenard Oil & Gas Company was purchased by Gulf in 1975.
Ballistic Energy Corporation Gulf Oil was mentioned as purchasing this company, but nothing else was found.
Exchange Resources Ltd Gulf Oil was mentioned as purchasing this company, but nothing else was found.
Independent Energy Inc Gulf Oil was mentioned as purchasing this company, but nothing else was found.
Mid-Continent Co. Inc. Gulf Oil was mentioned as purchasing this company, but nothing else was found.
Pano Tech Exploration
Corp.		 Gulf Oil was mentioned as purchasing this company in 1983, but nothing else was found.
Amalga-mated Bonanza Petroleum Gulf Oil was mentioned as purchasing this company in 1979, but nothing else was found.
Cenaro Oil & Gas Gulf Oil was mentioned as purchasing this company, but nothing else was found.
Devonian Gas
& Oil Co		 Gulf Oil was mentioned as purchasing this company, but nothing else was found.
Limpia Royalty Gulf Oil was mentioned as purchasing this company in 1962, but nothing else was found.
OA Sutton Gulf Oil was mentioned as purchasing this company in 1962, but nothing else was found.
Sipco, Inc. Gulf Oil was mentioned as purchasing this company, but nothing else was found. This was probably an acquisition by Sunset Petroleum.
Universal Consolid-ated
Oil Co.		 Gulf Oil was mentioned as purchasing this company in 1961, but nothing else was found.
Whaley Co. Gulf Oil was mentioned as purchasing this company in 1962, but nothing else was found.
Pend Oreille
Oil & Gas Co.		 Gulf Oil was mentioned as purchasing this company, but nothing else was found.
Calgary Petroleum Products
Limited		 Gulf Oil was mentioned as purchasing this company in 1925, but nothing else was found.
Union Oil Companies
Union Oil Company expanded to national status in 1965 with the merger of Pure Oil of Illinois, giving it operations in 37 states.
The Glacier Petroleum Company was a subsidiary of Montana Power Company. The Federal Government made them sell their gasoline business to Union Oil of California in 1944.
Poco Inc A materials that could withstand temperatures during reentry of space crafts lead to the development a specialty graphite developed by a Texas based aerospace. The Pure Oil Company purchased this material in 1964 and formed a division known as POCO, an acronym for the new owner. POCO's specialty graphites finally made it to outer space in 1977. This material was used   on Voyager I and Voyager II.  In August 2008 POCO was purchased by Entegris, Inc..
Pinal Dome Oil The Pinal Oil Company originated in Santa Maria, California ca. 1901 and later merged with the Dome Oil Company ca. 1911 to form the Pinal Dome Oil Company. The company was bought by Union Oil ca. July 1917.
Woodley Petroleum Company Woodley Petrolem Company was fornmed in 1922 by JR Parten. It was merged with Pure Oil Company April 1960. Union merged with Pure in 1965.
Cascade & Davidson This was a Pure Oil purchase.
Hughes Eastern Producting Inc Union Oil was mentioned as purchasing this company, but nothing else was found.
Johnston Oil & Gas Co. Union Oil was mentioned as purchasing this company, but nothing else was found.
LF Oil Union Oil was mentioned as purchasing this company, but nothing else was found.
Los Nietos Union Oil purchased Los Nietos Company, an oil and gas concern with holdings concentrated in California in 1949.
 MolyCorp Initially formed as Molybdenum Corporation of America. Union Oil purchased this company in 1970. MolyCorp is a mining company, a producer of rare-earth metals used in high-tech applications. A leading producer of lanthanide (rare earth) and molybdenum products. Lanthanides are used in automotive and refining catalysts, energy-saving fluorescent lamps, color phosphors for television picture tubes, glass polishing compounds, magnets for computer disk drives and other high-technology applications. Molybdenum is used to strengthen steel alloys. It bacame part of Chevron Mining in 2007
Chicago Carbon Company Chicago Carbon Company. This company was originally owned by Union Oil of California. Chevron merged it, Pittsburg & Midlands Coal Company and MolyCorp and renamed the company Chevron Mining in 2007.
Emergency Response Strike Team, Inc. (ERST) A provider of emergency management services to manufacturers, oil companies, chemical companies, municipalities and other organizations.
Northrock Resources, Ltd. Northrock Resources, Ltd was a Canadian company purchased by Union Oil in 2000.
P Moss Union Oil was mentioned as purchasing this company, but nothing else was found.
Pure Resources Inc. Pure Resources was formed in May 2000 when Titan Exploration, Inc., and the Permian Basin business unit of Unocal Corporation were meged. It operated as an independent exploration and production in the Permian Basin, the San Juan Basin, the Gulf Coast.
Prairie Holding Union Oil was mentioned as purchasing this company in 1990, but nothing else was found.
Tana Oil and
Gas Company		 Tana Oil and Gas, a subsidiary of privately held TRT Holdings, Inc. of Irving, Texas. Tana was formed in the early 1970s as an onshore oil and gas exploration and production company. Union purchased Tana in 1999.
Texas National Petroleum Corp. Union Oil was mentioned as purchasing this company in 1962, but nothing else was found.
Titan
Exploration Inc.		 Unocal and Titan Exploration Inc. merged their respective oil and gas operations in the Permian and San Juan Basins of west Texas and New Mexico, forming Pure Resources, Inc in 2000.
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