Granted Patent
Utility
US 4,032,591 · App. 05/634,624
Preparation of alpha-olefin oligomer synthetic lubricant
Inventors:
Barrett L. Cupples, William J. Heilman
Patented Case
View Patent ↗
Granted: Jun 28, 1977
Filed: Nov 24, 1975
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.