Granted Patent
Utility
US 6,228,815 · App. 09/458,116
Solid lubricants containing bismuth sulfide for use in friction lining
Inventor:
Sunil Kesavan
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Jun 29, 1999
Inventor
Sunil Kesavan
Assignee (at issue)
AlliedSignal, 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.