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:
Feb. 17, 2004
Filed:
Apr. 15, 1999
Applicant:
Inventors:
Patrick R. Spearman, The Woodlands, TX (US);
Michael R. Spearman, The Woodlands, TX (US);
Majid Zia, White Bear Township, MN (US);
Assignee:
Porous Media Corporation, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 2/935 ;
U.S. Cl.
CPC ...
B01D 2/935 ;
Abstract
A conically shaped filtration and/or separation apparatus is provided which is constructed from a stack of filters at least some of which are different sizes superposed above each, other, of said plurality of said filters in a fluid communicable relationship. A collapsible version of such conically shaped filter and/or separation apparatus is provided whereby a plurality of such filters are connected together using two piece interlocking or connecting end caps.