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:
Jul. 24, 2007
Filed:
Dec. 02, 1999
Stephen Proulx, Boxboro, MA (US);
George Perivolotis, Littleton, MA (US);
Zhenwu Lin, Taipei, TW;
Gregory Straeffer, North Chelmsford, MA (US);
George A. Gagne, Dracut, MA (US);
Kenneth King, West Newbury, MA (US);
Ralph J. Stankowski, Westford, MA (US);
Stephen Proulx, Boxboro, MA (US);
George Perivolotis, Littleton, MA (US);
Zhenwu Lin, Taipei, TW;
Gregory Straeffer, North Chelmsford, MA (US);
George A. Gagne, Dracut, MA (US);
Kenneth King, West Newbury, MA (US);
Ralph J. Stankowski, Westford, MA (US);
Entegris, Inc., Chaska, MN (US);
Abstract
A depth filter design is disclosed which has little if any open void area upstream of the media. Preferably, it also has little if any open void area downstream of the media as well. A preferred embodiment uses layers of stacked, fibrous media with several of the layers being separated from the others by spacers which serve to compress the media and to prevent the bypass of fluid around the media adjacent the inner wall of the housing. Several designs for attaching the end caps which allow for the compression of the media are also disclosed.