Granted Patent
Utility
US 6,489,393 · App. 09/695,177
Surface tinting composition and method of use
Inventors:
Arif Sitabkhan, Bart L. Ivic, Michael W. Howe
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Oct 24, 2000
Inventors
Arif Sitabkhan
Bart L. Ivic
Michael W. Howe
Assignee (at issue)
Pennzoil-Quaker State Company
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.