Granted Patent
Utility
US 5,292,443 · App. 07/933,621
Process for producing neutralized sulfurized alkylphenate lubricant detergent additive
Inventors:
Carl K. Esche, Jr., Gregory Anderson, John R. Sanderson
Patented Case
View Patent ↗
Granted: Mar 8, 1994
Filed: Aug 21, 1992
Inventors
Carl K. Esche, Jr.
Gregory Anderson
John R. Sanderson
Assignee (at issue)
Texaco 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.