Granted Patent
Utility
US 5,032,335 · App. 07/378,897
Manufacture of sealing elements of composite sintered polymeric material
Inventor:
David J. Wilson
Patented Case
View Patent ↗
Granted: Jul 16, 1991
Filed: Jul 12, 1989
Inventor
David J. Wilson
Assignee (at issue)
Mather Seal 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.