Granted Patent
Utility
US 4,393,167 · App. 06/320,127
Polymer blends containing polymer of .beta.-hydroxybutyric acid and chlorine or nitrile group containing polymer
Inventors:
Paul A. Holmes, Frank M. Willmouth, Alan B. Newton
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Nov 10, 1981
Inventors
Paul A. Holmes
Frank M. Willmouth
Alan B. Newton
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.