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:
May. 25, 2004
Filed:
Jun. 14, 2002
Applicant:
Inventors:
James O. Kubokawa, Saint Paul, MN (US);
Allen J. Rivard, White Bear Lake, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 4/500 ;
U.S. Cl.
CPC ...
B01D 4/500 ;
Abstract
A reversibly expandable filter element includes pleated filter media and a flexible spacing structure attached to the pleated media that provides the pleated media with uniform pleat spacing.