Granted Patent
Utility
US 4,764,552 · App. 06/933,956
Grafted nitrile rubber--plasticized PVC blends as thermoplastic elastomers
Inventors:
John C. Falk, Leland B. Kliever
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Nov 24, 1986
Inventors
John C. Falk
Leland B. Kliever
Assignee (at issue)
Borg-Warner Chemicals, Inc.
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.