Granted Patent
Utility
US 4,231,921 · App. 05/922,875
Novel light stabilizers
Inventor:
Paul Moser
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: Jul 10, 1978
Inventor
Paul Moser
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.