Granted Patent
Utility
US 4,347,111 · App. 06/099,792
Photosensitive hydroxyalkylphenones
Inventors:
Jurgen Gehlhaus, Manfred Kieser
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Nov 26, 1979
Inventors
Jurgen Gehlhaus
Manfred Kieser
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.