Granted Patent
Utility
US 4,692,486 · App. 06/887,961
Synergistic mixture of low-molecular and high-molecular polyalkylpiperidines
Inventor:
Francois Gugumus
Patented Case
View Patent ↗
Granted: Sep 8, 1987
Filed: Jul 21, 1986
Inventor
Francois Gugumus
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.