Granted Patent
Utility
US 4,464,322 · App. 06/455,782
Method of making a seal
Inventor:
John D. Butler
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Jan 5, 1983
Inventor
John D. Butler
Assignee (at issue)
Federal-Mogul LLC
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.