Granted Patent
Utility
US 6,187,722 · App. 09/359,229
Imidazole thione additives for lubricants
Inventors:
Robert G. Rowland, Cyril A. Migdal
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Jul 22, 1999
Inventors
Robert G. Rowland
Cyril A. Migdal
Assignee (at issue)
Uniroyal Chemical 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.