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:
Nov. 24, 2009
Filed:
Jul. 17, 2006
Douglas C Sundet, Hudson, WI (US);
Rahul R. Shah, Woodbury, MN (US);
John M. Brandner, St Paul, MN (US);
Tien T. Wu, Woodbury, MN (US);
Douglas C Sundet, Hudson, WI (US);
Rahul R. Shah, Woodbury, MN (US);
John M. Brandner, St Paul, MN (US);
Tien T. Wu, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A filter element in the form of a nonwoven self-supporting filtration web having rows of folded or corrugated spaced-apart pleats, the web containing continuous thermoplastic fibers a majority of which are aligned at 90°±20° with respect to the row direction. The filter element can be made by forming rows of pleats in such a nonwoven web and cutting the web to a desired size and shape. The filter elements can provide improved mechanical and filtration properties and can exhibit reduced susceptibility to pleat deformation and the loss of space between pleats.