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:
Dec. 27, 2011
Filed:
Jul. 20, 2005
Crankcase lubricating oil composition for protection of silver bearings in locomotive diesel engines
Melanie F. Tobias, Pleasant Hill, CA (US);
Kenneth D. Nelson, Napa, CA (US);
Elaine S. Yamaguchi, El Cerrito, CA (US);
Vernon R. Small, Hercules, CA (US);
Melanie F. Tobias, Pleasant Hill, CA (US);
Kenneth D. Nelson, Napa, CA (US);
Elaine S. Yamaguchi, El Cerrito, CA (US);
Vernon R. Small, Hercules, CA (US);
Chevron Oronite Company LLC, San Ramon, CA (US);
Abstract
The present invention is directed to a crankcase lubricating oil composition for protection of silver bearings in locomotive diesel engines comprising (A) a major amount of an oil of lubricating viscosity, and (B) a silver wear protection additive composition, and (C) one or more detergents. The silver wear protection additive composition of the present invention comprises a mixture of (i) a hydrocarbylamine salt of a di-alkyl di-thiophosphoric acid and (ii) a hydrocarbylamine salt of an alkyl acid phosphate.