The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 1989
Filed:
Mar. 31, 1988
Applicant:
Inventor:
I-Ching Chiu, Houston, TX (US);
Assignee:
Pennzoil Products Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 475 ; 252 486 ; 558255 ; 558256 ;
Abstract
A phosphorous free antiwear/antifriction additive for lubricant oil is described. The additive is a fatty acid thio ester or a dialkyl disubstituted fatty acid thio amine having the formula of ##STR1## wherein R.sub.1 is a saturated or unsaturated hydrocarbon having 8 to 40 carbon atoms;