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:
Nov. 09, 1999
Filed:
Aug. 15, 1997
Applicant:
Inventors:
Linelle R Johnson, Bloomington, MN (US);
Gary L Butler, Silver Lake, MN (US);
Thomas J Bachinski, Minnetonka, MN (US);
Assignee:
Donaldson Company, Inc., Minnespolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
96135 ; 55486 ; 55514 ; 55524 ; 55527 ; 96154 ; 210491 ; 2105021 ; 210505 ; 428 362 ; 428 74 ; 442 21 ; 442 45 ; 442121 ; 442393 ;
Abstract
A filter includes a center layer of carbon cloth interposed between two layers of filter material whose edges are welded together to provide not only a filter edge substantially free of carbon particles, but also an effective barrier to the migration of carbon particles from the filter's interior to its exterior. A filter pouch, encapsulating the carbon filter, includes a layered structure welded together proximate its edges. The filter pouch is also suitable for use with a desiccant filter.