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. 13, 2010
Filed:
Jul. 31, 2006
Andrew R. Fox, Oakdale, MN (US);
John D. Stelter, St. Joseph Township, WI (US);
Seyed A. Angadjivand, Woodbury, MN (US);
Timothy J. Lindquist, Woodbury, MN (US);
John M. Brandner, St. Paul, MN (US);
James E. Springett, Hudson, WI (US);
Andrew R. Fox, Oakdale, MN (US);
John D. Stelter, St. Joseph Township, WI (US);
Seyed A. Angadjivand, Woodbury, MN (US);
Timothy J. Lindquist, Woodbury, MN (US);
John M. Brandner, St. Paul, MN (US);
James E. Springett, Hudson, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A pleated filter is made from a monocomponent monolayer nonwoven web containing a bimodal mass fraction/fiber size mixture of intermingled larger size and smaller size continuous monocomponent polymeric fibers of the same polymeric composition. Rows of pleats are formed in the nonwoven web, and the pleated web is cut to a desired size and shape to provide a filter element containing a self-supporting porous monocomponent monolayer matrix of fibers bonded to one another at at least some points of fiber intersection and having an average initial submicron efficiency of at least 15% at a 1.52 meters/sec face velocity. The filter element is deformation resistant without requiring stiffening layers, bicomponent fibers or other reinforcing measures in the filter media layer.