Granted Patent
Utility
US 4,863,981 · App. 07/063,885
Synergistic mixture of stabilizers
Inventor:
Francois Gugumus
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Jun 19, 1987
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.