Granted Patent
Utility
US 4,325,998 · App. 06/208,372
Biaxially stressed fluorinated polymer roll cover
Inventor:
Harry S. Chapman
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Nov 19, 1980
Inventor
Harry S. Chapman
Assignee (at issue)
Kennecott Holdings 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.