Granted Patent
Utility
US 4,747,988 · App. 06/744,858
Process of making an aromatic polyetherketone fiber product
Inventor:
Martin H. G. Deeg
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Jun 14, 1985
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.