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America’s iconic companies that disappeared

An Amoco gas station displays its gas prices April 24, 2001 in Chicago.

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The oil company that started in 1910 was a giant in 1989. It was a leader in the lead-free gas movement and became the largest natural-gas producer in North America in the late '90s. Amoco never saw significant financial troubles: In 1997 the company earned $2.7 billion on revenue of $36.3 billion. But in 1998 it merged with British Petroleum in a $61 billion deal. Existing service stations were rebranded under the BP name, and the Amoco brand slowly dissolved.

Tim Boyle | Newsmakers | Getty Images