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:
Jul. 09, 2013
Filed:
Mar. 13, 2008
John M. Rosenbaum, Richmond, CA (US);
Brent K. Lok, San Francisco, CA (US);
David C. Kramer, San Anselmo, CA (US);
John O'brien, Walton on Thames, GB;
Stephen J. Miller, San Francisco, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Brent K. Lok, San Francisco, CA (US);
David C. Kramer, San Anselmo, CA (US);
John O'Brien, Walton on Thames, GB;
Stephen J. Miller, San Francisco, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A process for producing an API Group I base oil, comprising: blending a lower quality base oil that does not meet API Group I specifications with a Fischer-Tropsch derived distillate fraction having defined pour point, viscosity index and Oxidator B, and isolating an API Group I base oil that has improved defined properties. A process for producing an API Group I base oil, consisting essentially of: (a) selecting a lower quality base oil not meeting API Group I specifications, having defined saturates, viscosity index and Oxidator BN; and (b) blending the lower quality base oil with a Group II base oil and a Fischer-Tropsch derived base oil. A process for improving the lubricating properties of a lower quality base oil. Also, a process for operating a base oil plant.