Granted Patent
Utility
US 4,269,802 · App. 05/824,144
Process for making dual-material self-bonding lip seal
Inventor:
Terry D. Linne
Patented Case
View Patent ↗
Granted: May 26, 1981
Filed: Aug 12, 1977
Inventor
Terry D. Linne
Assignee (at issue)
Caterpillar Tractor Co.
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.