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:
Oct. 23, 2012
Filed:
Sep. 02, 2009
Lisa M. Croll, Battersea, CA;
Jeffrey R. Dahn, Upper Tantallon, CA;
Allen R. Siedle, Lake Elmo, MN (US);
Jock W. H. Smith, Halifax, CA;
Philippe Westreich, New Castle, PA (US);
Thomas E. Wood, Stillwater, MN (US);
Lisa M. Croll, Battersea, CA;
Jeffrey R. Dahn, Upper Tantallon, CA;
Allen R. Siedle, Lake Elmo, MN (US);
Jock W. H. Smith, Halifax, CA;
Philippe Westreich, New Castle, PA (US);
Thomas E. Wood, Stillwater, MN (US);
Other;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A filter for removing contaminants from air. The filter includes (a) a substrate that does not have any volatile ammonia on the surface thereof; (b) copper that has been impregnated onto the substrate; and (c) molybdenum and/or tungsten that has been impregnated onto the substrate. The filter can be made using an aqueous solution(s) that contains one or more of a first copper salt and a second salt that include a polynuclear anion that contains molybdenum, tungsten, or both. Because the metals can be impregnated onto the substrate surface without using an ammonium-based solution, the need to manage ammonia off-gassing is avoided. Further, no volatile ammonia would be present on the resulting substrate surface.