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. 17, 2002
Filed:
Apr. 23, 1996
Applicant:
Inventor:
Mary Anne Alvin, Pittsburgh, PA (US);
Assignee:
Siemens Westinghouse Power Corporation, Orlando, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/920 ; B01D 4/624 ;
U.S. Cl.
CPC ...
B01D 3/920 ; B01D 4/624 ;
Abstract
A filter element having a plurality of membrane layers. The filter element has a filter member having a porous sidewall. The sidewall has an outer surface and an inner surface which allow a gas to flow through. A first membrane is in communication with the outer surface for preventing particulate matter from penetrating the outer surface. A second membrane is in communication with the inner surface for preventing particulate matter from penetrating the inner surface.