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. 26, 2013
Filed:
Sep. 29, 2006
Hemang Patel, Middletown, CT (US);
Keith Wesner, East Hampton, CT (US);
Thomas J. Hamlin, Vernon, CT (US);
Robert A. Governal, Middletown, CT (US);
Guillermo M. Vidal, Cincinnati, OH (US);
Dimitris I. Collias, Mason, OH (US);
Jeannine R. Bahm, Milford, OH (US);
Hemang Patel, Middletown, CT (US);
Keith Wesner, East Hampton, CT (US);
Thomas J. Hamlin, Vernon, CT (US);
Robert A. Governal, Middletown, CT (US);
Guillermo M. Vidal, Cincinnati, OH (US);
Dimitris I. Collias, Mason, OH (US);
Jeannine R. Bahm, Milford, OH (US);
Pur Water Purification Products, Inc., Cincinnati, OH (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
In one embodiment, the present disclosure provides fail-safe mechanisms for final filters. The fail-safe mechanisms of the present disclosure include a prefilter that is essentially transparent or translucent to TOC contaminants and a microporous filter downstream from the prefilter that filters contaminants by means of size-exclusion, mechanical interception, coagulation, or a combination thereof, the filter being adapted to significantly reduce fluid flow and undergo blockage under a challenge by TOC contaminants. In another embodiment, the present disclosure provides a method of filtration that includes the steps of providing a microporous filter disposed upstream from a final filter, the microporous filter capable of filtering contaminants from a fluid by means of size-exclusion, mechanical interception, coagulation, or a combination thereof, and said filter being adapted to significantly reduce fluid flow and undergo blockage under a challenge by TOC contaminants, and filtering the fluid through the microporous filter