Granted Patent
Utility
US 4,591,700 · App. 06/589,032
PTC compositions
Inventor:
Umesh Sopory
Patented Case
View Patent ↗
Granted: May 27, 1986
Filed: Mar 12, 1984
Inventor
Umesh Sopory
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.