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. 11, 2001
Filed:
Aug. 16, 1994
Applicant:
Inventors:
Thomas R. Forbus, Jr., Newtown, PA (US);
Chwan P. Kyan, Mantua, NJ (US);
Assignee:
Mobil Oil Corporation, Fairfax, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10G 7/302 ;
U.S. Cl.
CPC ...
C10G 7/302 ;
Abstract
Lubricant oils of low pour point and improved oxidation stability are produced by catalytically dewaxing a lube feedstock over a zeolite dewaxing catalyst such as ZSM-5 in the hydrogen or decationized form. The use of these catalysts enables products of excellent oxidative stability to be obtained and reduces the catalyst aging rate in the first and subsequent dewaxing cycles to values below 5° F./day. The duration of the dewaxing cycles may be extended, particularly in the second and subsequent cycles after hydrogen reactivation.