Granted Patent
Utility
US 5,202,040 · App. 07/536,906
Synthetic lubricant base stocks by co-reaction of olefins and anisole compounds
Inventors:
John R. Sanderson, Edward T. Marquis
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Jun 12, 1990
Inventors
John R. Sanderson
Edward T. Marquis
Assignee (at issue)
Texaco Chemical 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.