Granted Patent
Utility
US 4,279,721 · App. 06/039,464
Mercaptophenyl ketones as initiators for the photopolymerization of ethylenically unsaturated compounds
Inventors:
Rudolf Kirchmayr, Louis Felder
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: May 16, 1979
Inventors
Rudolf Kirchmayr
Louis Felder
Assignee (at issue)
Ciba-Geigy
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.