Granted Patent
Utility
US 4,885,457 · App. 07/252,229
Method of making a conductive polymer sheet
Inventor:
Andrew N. Au
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Sep 30, 1988
Inventor
Andrew N. Au
Assignee (at issue)
Raychem Limited
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.