Granted Patent
Utility
US 5,217,845 · App. 07/766,975
Photopolymerizable mixture and photopolymerizable copying material containing same
Inventors:
Hartmut Steppan, Hans-Dieter Frommeld
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Sep 26, 1991
Inventors
Hartmut Steppan
Hans-Dieter Frommeld
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.