Gulf Oil was a major global oil company from the 1900s to the 1980s. The eighth-largest American manufacturing company in 1941 and the ninth-largest in 1979, Gulf Oil was one of the so-called Seven Sisters oil companies. Prior to its merger with Standard Oil of California, Gulf was one of the chief instruments of the legendary Mellon family fortune; both Gulf and Mellon Financial had their headquarters in Pittsburgh, Pennsylvania. Gulf's former headquarters, originally referred to as "the Gulf Building" , is an art-deco skyscraper. The tallest building in Pittsburgh until 1970, when it was... eclipsed by the U.S. Steel Tower, it is capped by a step pyramid structure several stories high. Until the late 1970s, the entire top was illuminated, changing color with changes in barometric pressure to provide a weather indicator that could be seen for many miles. Gulf Oil Corporation ceased to exist as an independent company in 1985, when it merged with SOCAL, with both re-branding as Chevron. However, the Gulf brand name and a number of the constituent business divisions of GOC survived.
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| Founded: | 1901 |
| Headquarters: | Newton, Massachusetts |
| Annual revenue: | $23,910,000,000 |
| Net income: | $1,322,000,000 |
| Industries: | Petroleum |