Granted Patent
Utility
US 4,866,113 · App. 07/183,117
Compounds useful as pigments containing one or more 2,2,6,6-tetraalkylpiperidine groups
Inventors:
Peter Bitterli, Manfred Geisel, Jurgen Goldmann, Bansi Lal Kaul
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Apr 19, 1988
Inventors
Peter Bitterli
Manfred Geisel
Jurgen Goldmann
Bansi Lal Kaul
Assignee (at issue)
Sandoz AG
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.