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. 01, 2009
Filed:
Apr. 07, 2006
Michael J. Haire, Petaluma, CA (US);
John A. Zakarian, Hercules, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Nancy J. Bertrand, Lafayette, CA (US);
Stephen J. Miller, San Francisco, CA (US);
Michael J. Haire, Petaluma, CA (US);
John A. Zakarian, Hercules, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Nancy J. Bertrand, Lafayette, CA (US);
Stephen J. Miller, San Francisco, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
Gear lubricant with a low Brookfield Ratio, comprising: a base oil having sequential carbon atoms, low aromatics, greater than 20 wt % molecules with cycloparaffins and a high ratio of monocycloparaffins to multicycloparaffins; less than 22 wt % of a second base oil having less than 40 wt % molecules with cycloparaffins and a lower ratio of monocycloparaffins to multicycloparaffins; a pour point depressant, an EP additive; and less than 10 wt % VI improver. Gear lubricant with a low Brookfield Ratio, comprising a first base oil having low aromatics and high VI; less than 22 wt % of a second base oil with a lower VI; a pour point depressant; and an EP additive. Gear lubricant having a low Brookfield Ratio comprising: an FT derived base oil; a pour point depressing base oil blending component; and an EP additive. Processes for making gear lubricants with low Brookfield Ratios. Method for reducing Brookfield Ratio.