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:
Mar. 24, 2026
Filed:
Aug. 30, 2021
Applicant:
Chevron U.s.a. Inc., San Ramon, CA (US);
Inventors:
Subhasis Bhattacharya, San Ramon, CA (US);
Yihua Zhang, Albany, CA (US);
Guan-Dao Lei, Walnut Creek, CA (US);
Ajit R. Pradhan, San Ramon, CA (US);
Assignee:
CHEVRON U.S.A. INC., San Ramon, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G 45/62 (2006.01); B01J 29/74 (2006.01); C10G 45/64 (2006.01); C10G 65/04 (2006.01);
U.S. Cl.
CPC ...
C10G 45/62 (2013.01); B01J 29/74 (2013.01); C10G 45/64 (2013.01); C10G 65/043 (2013.01); C10G 2300/302 (2013.01); C10G 2300/304 (2013.01); C10G 2400/10 (2013.01);
Abstract
An improved process and catalyst system for making a base oil product and for improving base oil cloud point and pour point characteristics, while also providing good product yields. The process and catalyst system generally involves the use of a layered catalyst system comprising an SSZ-91 catalyst and an SSZ-32X catalyst arranged to sequentially contact a hydrocarbon feedstock with both catalysts and thereby provide dewaxed base oil products.