Granted Patent
Utility
US 5,488,117 · App. 08/280,420
3-(acyloxyphenyl)benzofuran-2-one stabilisers
Inventor:
Peter Nesvadba
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: Jul 26, 1994
Inventor
Peter Nesvadba
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.