Granted Patent
Utility
US 5,643,995 · App. 08/478,717
Method for improving the processabilty of polyphthalamides
Inventors:
M. Jamal El-Hibri, Yu-Tsai Chen, David P. Sinclair
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jun 7, 1995
Inventors
M. Jamal El-Hibri
Yu-Tsai Chen
David P. Sinclair
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.