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:
Aug. 10, 1993
Filed:
Mar. 19, 1991
Applicant:
Inventor:
Mordechai Pasternak, Spring Valley, NY (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; B01D / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
208308 ; 585818 ; 585819 ; 21050027 ; 21050036 ; 210638 ; 210651 ;
Abstract
Dewaxed oil containing dewaxing solvent from solvent dewaxing is treated by contact with a separating elastomer membrane to yield a retentate containing increased content of dewaxed oil and decreased content of dewaxing solvent and a permeate which contains increased content of dewaxing solvent and decreased content of dewaxed oil--the membrane including a barrier layer of an adduct of maleic acid anhydride and a poly(aliphatic terpene) which has been thermally cross-linked.