Granted Patent
Utility
US 4,959,423 · App. 07/191,325
Nucleating agents for poly(aryl ether ketones)
Inventors:
James E. Harris, Paul A. Winslow
Patented Case
View Patent ↗
Granted: Sep 25, 1990
Filed: May 9, 1988
Inventors
James E. Harris
Paul A. Winslow
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.