Granted Patent
Utility
US 4,963,416 · App. 07/435,642
Method to reduce the damage caused by ionizing radiation to polyurethane/porous expanded polytetrafluroethylene composites by use of hindered phenols
Inventor:
Robert M. Thompson
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: Nov 13, 1989
Inventor
Robert M. Thompson
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.