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. 26, 2007
Filed:
Jan. 17, 2006
Z. Gerald Liu, Madison, WI (US);
Matthew P. Henrichsen, Evansville, WI (US);
William C. Haberkamp, Cookeville, TN (US);
Elaine M. Yorkgitis, St. Paul, MN (US);
Robert K. Miller, Indianapolis, IN (US);
Thomas E. Wood, Stillwater, MN (US);
Zhongshu Tan, St. Paul, MN (US);
Barry M. Verdegan, Stoughton, WI (US);
Z. Gerald Liu, Madison, WI (US);
Matthew P. Henrichsen, Evansville, WI (US);
William C. Haberkamp, Cookeville, TN (US);
Elaine M. Yorkgitis, St. Paul, MN (US);
Robert K. Miller, Indianapolis, IN (US);
Thomas E. Wood, Stillwater, MN (US);
Zhongshu Tan, St. Paul, MN (US);
Barry M. Verdegan, Stoughton, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Cummins Filtration IP, Inc., Minneapolis, MN (US);
Abstract
A filter, system and method is provided for filtering nanoparticles in a hot gas, namely particles <about 1 micron in a gas >about 200° C. and further particularly >about 450° C. including diesel exhaust. The filter includes filter media material composed of fibrous filter media having a plurality of fibers and granular filter media having a plurality of granules extending from the surfaces of the fibers. The filter is characterized by a permeability >about 3×10mand an inertial resistance coefficient <about 1×10m. The filter captures particles in the Most Penetrating Region (MPR). A filter system includes a nanoparticle filter in series with a diesel exhaust treatment element.