Granted Patent
Utility
US 4,132,663 · App. 05/786,537
Mineral oil compositions having improved pour point containing alpha-olefin copolymers
Inventors:
William J. Heilman, Thomas J. Lynch
Patented Case
View Patent ↗
Granted: Jan 2, 1979
Filed: Apr 11, 1977
Inventors
William J. Heilman
Thomas J. Lynch
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.