Granted Patent
Utility
US 4,954,605 · App. 07/332,532
Aromatic polyetherketone fiber product
Inventor:
Martin H. G. Deeg
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Mar 31, 1989
Inventor
Martin H. G. Deeg
Assignee (at issue)
Hoechst Celanese 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.