Granted Patent
Utility
US 4,282,392 · App. 05/916,476
Alpha-olefin oligomer synthetic lubricant
Inventors:
Barrett L. Cupples, William J. Heilman
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Jun 19, 1978
Inventors
Barrett L. Cupples
William J. Heilman
Assignee (at issue)
Gulf Research & Development 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.