Granted Patent
Utility
US 4,234,656 · App. 05/971,182
Reprocessable thermoplastic graft copolymer of propylene polymer and ethylene copolymer
Inventors:
Amar Amembal, Robert Bostwick, Richard G. Shaw
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Dec 20, 1978
Inventors
Amar Amembal
Robert Bostwick
Richard G. Shaw
Assignee (at issue)
Union Carbide Corporation
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.