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In page Amoco:

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In the late 1950s and early 1960s, Indiana Standard began to diversify its assets. It again led the way with scientific and technological discoveries.[citation needed] Indiana Standard discovered PTA, a chemical for polyester fiber production.[1] In 1968, following that discovery, Indiana Standard acquired the Avisun Corporation and Patchogue-Plymouth, forming the Amoco Fabrics and Fibers Company.[citation needed] By 1992, the company was trying to sell off its yarn factories in Alabama and Georgia.[2]