Granted Patent
Utility
US 4,937,291 · App. 07/242,391
Thermoplastic elastomer blends of a polyvinyl chloride-acrylate copolymer and a crosslinked nitrile elastomer
Inventors:
William S. Greenlee, Josef C. Vyvoda
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Sep 9, 1988
Inventors
William S. Greenlee
Josef C. Vyvoda
Assignee (at issue)
B. F. Goodrich Company
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.