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:
Jun. 01, 1993
Filed:
Sep. 10, 1991
Applicant:
Inventor:
Kazushige Tanabe, Tokyo, JP;
Assignee:
Nippon Roki Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
2104941 ; 21049701 ; 55500 ; 55502 ; 55520 ;
Abstract
The object of the present invention is to offer a general-purpose size filter cartridge for liquid filtration, which can extensively increase the service life for filtration. A depth type filter cartridge comprises a cylindrical hard porous core with threads wound thereupon, and it is characterized in that a sheet-like filter element is wound on said porous core directly or through a thread-winding layer, and a sheet-like filter element with a large number of pores is wound on said sheet-like filter element through a spacer.