Granted Patent
Utility
US 5,047,556 · App. 07/390,940
Photoinitiators having a combined structure
Inventors:
Manfred Kohler, Jorg Ohngemach
Patented Case
View Patent ↗
Granted: Sep 10, 1991
Filed: Aug 8, 1989
Inventors
Manfred Kohler
Jorg Ohngemach
Assignee (at issue)
Merck Patent 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.