Granted Patent
Utility
US 4,604,437 · App. 06/693,640
Polymer from substituted, unsaturated, bicyclic imide
Inventor:
Alfred Renner
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Jan 22, 1985
Inventor
Alfred Renner
Assignee (at issue)
Ciba-Geigy
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.