Granted Patent
Utility
US 4,863,623 · App. 07/172,664
Novel VI improver, dispersant, and anti-oxidant additive and lubricating oil composition containing same
Inventor:
Theodore E. Nalesnik
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Mar 24, 1988
Inventor
Theodore E. Nalesnik
Assignee (at issue)
Texaco 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.