Granted Patent
Utility
US 5,241,003 · App. 07/895,001
Ashless dispersants formed from substituted acylating agents and their production and use
Inventors:
David J. Degonia, Paul G. Griffin
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Jun 8, 1992
Inventors
David J. Degonia
Paul G. Griffin
Assignee (at issue)
Ethyl Petroleum Additives, 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.