摘要：

UNITED STATES PATENT OFFICE 2,465,319 POLYMERIC LINEAR TEREPHTHALIC ESTERS John Rex Whinfleld, Acerington, England, and James Tennant Dickson, East Lothian, Scotland, assignors, by mesne assignments, to E. I. du Pont de Nemours and Company, Wilmington, Del., a corporation of Delaware No Drawing....

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