Granted Patent
Utility
US 4,863,764 · App. 07/204,934
Fire retarding polypropylene fiber and fabric and method for preparing
Inventors:
Gayron Nixon Davis, Henry W. Haynes, Sr., Dhan N. Parekh
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: May 31, 1988
Inventors
Gayron Nixon Davis
Henry W. Haynes, Sr.
Dhan N. Parekh
Assignee (at issue)
West Point Pepperell
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.