Granted Patent
Utility
US 5,124,419 · App. 07/696,706
Imido polymers
Inventor:
Rene Arpin
Patented Case
View Patent ↗
Granted: Jun 23, 1992
Filed: May 7, 1991
Inventor
Rene Arpin
Assignee (at issue)
RHONE-POULENC CHIMIE
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.