Granted Patent
Utility
US 4,397,975 · App. 06/324,900
Heat stabilized polymers
Inventor:
Alva F. Harris
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Nov 25, 1981
Inventor
Alva F. Harris
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.