Granted Patent
Utility
US 5,286,839 · App. 07/816,765
Crystallizable copolyamide having terephthalamide and naphthalamide units
Inventor:
Yu-Tsai Chen
Patented Case
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Granted: Feb 15, 1994
Filed: Jan 2, 1992
Inventor
Yu-Tsai Chen
Assignee (at issue)
Amoco Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.