Granted Patent
Utility
US 4,619,957 · App. 06/764,282
Benzoate-stabilized rigid polyvinyl chloride compositions
Inventors:
William J. Reid, Jean M. Zappia, Gerald A. Capocci, John D. Spivack
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Aug 9, 1985
Inventors
William J. Reid
Jean M. Zappia
Gerald A. Capocci
John D. Spivack
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.