Granted Patent
Utility
US 4,524,167 · App. 06/655,277
Polymeric hindered phosphonate stabilizers
Inventors:
John D. Spivack, Stephen D. Pastor
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Sep 27, 1984
Inventors
John D. Spivack
Stephen D. Pastor
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.