Granted Patent
Utility
US 4,922,004 · App. 06/912,473
Copolymerizable photoinitiators
Inventors:
Manfred Kohler, Jorg Ohngemach, Eike Poetsch
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Sep 29, 1986
Inventors
Manfred Kohler
Jorg Ohngemach
Eike Poetsch
Assignee (at issue)
MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNG
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.