Granted Patent
Utility
US 4,952,663 · App. 07/208,373
Wholly aromatic polyesters with reduced char content
Inventors:
James W. Cleary, Richard Layton
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Jun 17, 1988
Inventors
James W. Cleary
Richard Layton
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.