Granted Patent
Utility
US 5,576,273 · App. 08/560,669
Lubricating compositions containing bismuth compounds
Inventors:
Thomas J. Karol, Steven G. Donnelly, Ronald J. Hiza
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Nov 20, 1995
Inventors
Thomas J. Karol
Steven G. Donnelly
Ronald J. Hiza
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.