Granted Patent
Utility
US 6,620,771 · App. 09/993,075
Thiadiazole dimer additives and lubricating compositions containing the same
Inventors:
Thomas J. Karol, Ronald J. Tepper
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Nov 14, 2001
Inventors
Thomas J. Karol
Ronald J. Tepper
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.