Granted Patent
Utility
US 4,272,609 · App. 06/095,363
Photopolymerizable mixture
Inventor:
Kurt Klupfel
Patented Case
View Patent ↗
Granted: Jun 9, 1981
Filed: Nov 19, 1979
Inventor
Kurt Klupfel
Assignee (at issue)
Hoechst GmbH
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.