Granted Patent
Utility
US 5,062,980 · App. 07/428,545
Polymeric step ladder polysuccinimide compositions suitable for lubricating oil dispersants and fuel additives
Inventors:
Cyril A. Migdal, Robert H. Jenkins, Jr.
Patented Case
View Patent ↗
Granted: Nov 5, 1991
Filed: Oct 30, 1989
Inventors
Cyril A. Migdal
Robert H. Jenkins, Jr.
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.