Granted Patent
Utility
US 4,298,481 · App. 06/015,533
High temperature grease compositions
Inventor:
David Clarke
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Feb 23, 1979
Inventor
David Clarke
Assignee (at issue)
Tenneco Chemicals, 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.