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:
Mar. 25, 2008
Filed:
Jan. 28, 2000
Kwok-shun Cheng, Nashua, NH (US);
Cha P. Doh, Sudbury, MA (US);
Larry Y. Yen, Andover, MA (US);
Rajnikant B. Patel, Tewksbury, MA (US);
T. Dean Gates, Bedford, MA (US);
Kwok-Shun Cheng, Nashua, NH (US);
Cha P. Doh, Sudbury, MA (US);
Larry Y. Yen, Andover, MA (US);
Rajnikant B. Patel, Tewksbury, MA (US);
T. Dean Gates, Bedford, MA (US);
Entegris, Inc., Chaska, MN (US);
Abstract
A filtration cartridge having a housing with an inlet and an outlet and a filtration membrane contained within the housing and located between the inlet and the outlet is described. The membrane is sealed in such a manner that all fluid must flow through the membrane between entering the inlet and leaving the outlet of the housing. The entire cartridge, housing, membrane and any other components are all formed of one or more perfluorinated thermoplastic resins. These resins preferably are PFA, MFA, FEP and blends thereof. The membrane may be in the form of hollow fibers, wound fibers such as in a depth filter, or a flat sheet which may be formed into various configurations such as spiral filters, pleated filters, spiral pleated filters, disks and the like. These cartridges provide an inert, high temperature and acid/oxidative chemical resistant filter having properties similar to that of PTFE resins.