Granted Patent
Utility
US 4,232,131 · App. 05/959,783
Polymeric light stabilizers for plastics
Inventors:
Jean Rody, Michael Rasberger
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: Nov 13, 1978
Inventors
Jean Rody
Michael Rasberger
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.