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:
Jan. 06, 2009
Filed:
Jan. 24, 2008
Applicants:
John M. Rosenbaum, Richmond, CA (US);
Nancy K. Smrcka, Richmond, CA (US);
Inventors:
John M. Rosenbaum, Richmond, CA (US);
Nancy K. Smrcka, Richmond, CA (US);
Assignee:
Chevron U.S.A., Inc., San Ramon, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G 71/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for operating a railroad engine, comprising: using a lubricating oil in the railroad engine, wherein the lurbricating oil has: a) less than 100 ppm zinc; b) a cold cranking simulator viscosity at −15° C. less than 7000 cP; c) a GE HTHS (final) of at least 10.8 cP; and d) a TBN between 8 and 20.