Granted Patent
Utility
US 5,614,124 · App. 08/481,212
Polyisobutylene succinimide, ethylene-propylene succinimide and an alkylated phenothiazine additive for lubricating oil compositions
Inventors:
Carl K. Esche, Jr., Cyril A. Migdal, John R. Sanderson, Anthony L. Ippolito
Patented Case
View Patent ↗
Granted: Mar 25, 1997
Filed: Jun 7, 1995
Inventors
Carl K. Esche, Jr.
Cyril A. Migdal
John R. Sanderson
Anthony L. Ippolito
Assignee (at issue)
Ethyl Additives Corporation
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.