Granted Patent
Utility
US 4,555,541 · App. 06/579,232
Benzoate-stabilized rigid polyvinyl chloride compositions
Inventors:
William J. Reid, Jean M. Zappia, Gerald A. Capocci, John D. Spivack
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Feb 13, 1984
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.