Granted Patent
Utility
US 5,569,842 · App. 08/412,079
Automated system for identifying and analyzing different types of used lubricants
Inventor:
Regan L. Silvestri
Patented Case
View Patent ↗
Granted: Oct 29, 1996
Filed: Mar 28, 1995
Inventor
Regan L. Silvestri
Assignee (at issue)
Man-Gill Chemical 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.