Granted Patent
Utility
US 6,235,686 · App. 09/640,321
Lubricating compositions containing aromatized 1,2-dihydro-2,2,4-trimethylquinoline polymers
Inventors:
Thomas J. Karol, Steven G. Donnelly
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Aug 16, 2000
Inventors
Thomas J. Karol
Steven G. Donnelly
Assignee (at issue)
R.T. Vanderbilt Company, 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.