Granted Patent
Utility
US 4,000,100 · App. 05/150,225
Thermal and light stabilized polyvinyl chloride resins
Inventor:
Henry Baldyga
Patented Case
View Patent ↗
Granted: Dec 28, 1976
Filed: Jun 4, 1971
Inventor
Henry Baldyga
Assignee (at issue)
W. R. Grace & Co.
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.