Granted Patent
Utility
US 4,276,232 · App. 06/082,499
Phosphorus stabilizers
Inventor:
Michael Rasberger
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Oct 9, 1979
Inventor
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.