Granted Patent
Utility
US 4,283,310 · App. 06/091,396
P.V.C. Compositions for extrusion moulding
Inventors:
Kenneth James, Frederick J. Smith
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: Nov 6, 1979
Inventors
Kenneth James
Frederick J. Smith
Assignee (at issue)
Talres Development (N.A.) N.V.
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.