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. 05, 2006
Filed:
Nov. 20, 2002
Brent K. Lok, San Francisco, CA (US);
David Kramer, San Anselmo, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Joseph Pudlak, Vallejo, CA (US);
Brent K. Lok, San Francisco, CA (US);
David Kramer, San Anselmo, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Joseph Pudlak, Vallejo, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A process for producing a lubricating base oil blend which comprises (a) recovering a Fischer-Tropsch derived distillate fraction characterized by a kinematic viscosity of about 2 cSt or greater but less than 3 cSt at 100 degrees C.; and (b) blending the Fischer-Tropsch derived distillate fraction with a petroleum derived base oil selected from the group consisting of a Group I base oil, a Group II base oil, a Group III base oil, and a mixture of two or more of any of the foregoing conventional base oils in the proper proportion to produce a lubricating base oil blend characterized as having a viscosity of about 3 or greater; also the base oil blends, finished lubricants, and their use in internal combustion engines.