Granted Patent
Utility
US 4,423,178 · App. 06/315,687
Plasticizers for vinyl chloride polymers
Inventor:
James T. Renshaw
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Oct 28, 1981
Inventor
James T. Renshaw
Assignee (at issue)
Monsanto Company
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.