Granted Patent
Utility
US 4,189,387 · App. 05/938,459
Lubricant compositions based on zirconium polymers
Inventor:
James P. King
Patented Case
View Patent ↗
Granted: Feb 19, 1980
Filed: Aug 31, 1978
Inventor
James P. King
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.