Granted Patent
Utility
US 5,045,176 · App. 07/474,686
Carbometallic oil conversion with ballistic separation
Inventors:
Paul W. Walters, Roger M. Benslay, Dwight F. Barger
Patented Case
View Patent ↗
Granted: Sep 3, 1991
Filed: Feb 5, 1990
Inventors
Paul W. Walters
Roger M. Benslay
Dwight F. Barger
Assignee (at issue)
Ashland Oil, 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.