Granted Patent
Utility
US 4,605,694 · App. 06/793,508
Plasticizing compositions for polyvinylchloride
Inventor:
John Walker
Patented Case
View Patent ↗
Granted: Aug 12, 1986
Filed: Oct 31, 1985
Inventor
John Walker
Assignee (at issue)
HERCULES LLC
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.