Granted Patent
Utility
US 4,419,472 · App. 06/322,041
Piperidine compositions for light stabilization
Inventors:
Godwin Berner, Manfred Rembold, Jean Rody
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Nov 16, 1981
Inventors
Godwin Berner
Manfred Rembold
Jean Rody
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.