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:
Jan. 31, 2012
Filed:
Aug. 28, 2008
Nekheel Gajjar, Chicago, IL (US);
Paul R. Micheli, Glen Ellyn, IL (US);
Nekheel Gajjar, Chicago, IL (US);
Paul R. Micheli, Glen Ellyn, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A system, in certain embodiments, includes a fluid filter that includes a first set of strips of a first filter material having a first density, and a second set of strips of a second filter material having a second density greater than the first density, wherein the first set and second set of strips are arranged in an alternating pattern to define a first filter layer. The system also includes a second filter layer comprising a third filter material having a third density greater than the second density, wherein the first filter layer is coupled to the second filter layer. In other embodiments, the system includes a fluid filter which includes a first filter material having a first density, a second filter material having a second density greater than the first density, and a third filter material having a third density greater than the second density. The system may also include the first filter material coupled to both the second filter material and the third filter material, as well as the second filter material coupled to both the first filter material and the third filter material.