Granted Patent
Utility
US 4,849,148 · App. 07/107,845
Process of making an aromatic polyetherketone fiber product
Inventor:
Martin H. G. Deeg
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Oct 6, 1987
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.