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:
Dec. 03, 1991
Filed:
Sep. 07, 1989
Applicant:
Inventors:
Darrell W Brownawell, Scotch Plains, NJ (US);
Paul K Ladwig, Randolph, NJ (US);
Assignee:
Exxon Research & Engineering Company, Florham Park, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210749 ; 210806 ; 210314 ; 210315 ; 210335 ; 210338 ; 2104165 ; 210209 ; 208182 ; 208183 ;
Abstract
A filter system containing, in series, a first filter media having a chemically active filter media, a physically active filter media, or mixtures thereof and a second filter media having an inactive filter media can effectively rejuvenate used lubricating oils. In a preferred embodiment, the chemically or physically active filter media will be within a cannister that is separate from a container having both active and inactive filter media.