Granted Patent
Utility
US 5,710,198 · App. 08/662,108
Cyclic diphenylacetonitriles as stabilizers
Inventor:
Rita Pitteloud
Patented Case
View Patent ↗
Granted: Jan 20, 1998
Filed: Jun 14, 1996
Inventor
Rita Pitteloud
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.