Granted Patent
Utility
US 4,985,296 · App. 07/324,166
Polytetrafluoroethylene film
Inventor:
William P. Mortimer, Jr.
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Mar 16, 1989
Inventor
William P. Mortimer, Jr.
Assignee (at issue)
W. L. Gore & Associates, Inc.
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.