Granted Patent
Utility
US 5,763,369 · App. 08/334,513
Motor oil performance-enhancing formulation
Inventors:
Richard J. Baumgart, Michael A. Dituro
Patented Case
View Patent ↗
Granted: Jun 9, 1998
Filed: Nov 4, 1994
Inventors
Richard J. Baumgart
Michael A. Dituro
Assignee (at issue)
Ashland, 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.