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:
Nov. 15, 2011
Filed:
Jun. 28, 2007
Chantal R. Swartele, Laarne, BE;
John M. Rosenbaum, Richmond, CA (US);
Marc J. DE Weerdt, Machelen, BE;
Thomas Plaetinck, Zomergem, BE;
Stephen J. Miller, San Francisco, CA (US);
Mark L. Sztenderowicz, San Francisco, CA (US);
Chantal R. Swartele, Laarne, BE;
John M. Rosenbaum, Richmond, CA (US);
Marc J. De Weerdt, Machelen, BE;
Thomas Plaetinck, Zomergem, BE;
Stephen J. Miller, San Francisco, CA (US);
Mark L. Sztenderowicz, San Francisco, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A process to make a shock absorber fluid having improved performance properties, the properties including an air release after 1 minute by DIN 51381 of less than 0.8 vol %, a kinematic viscosity at 100° C. less than 5 mm/s and an aniline point greater than or equal to 95° C., or meeting the specifications for Kayaba 0304-050-0002 or VW TL 731 class A. The shock absorber fluid is made by blending a base oil having less than 10 wt % naphthenic carbon and a high viscosity index with low levels of (or no) viscosity index improver and pour point depressant.