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:
Sep. 22, 2020
Filed:
Mar. 22, 2016
Donaldson Company, Inc., Minneapolis, MN (US);
Daniel L. Tuma, St. Paul, MN (US);
Ryan M. Callahan, Minneapolis, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
The present technology is generally related to a filter assembly. The filter assembly has a first layer has a base layer defining a first perimeter region and a region central to the first perimeter region. A first adhesive is disposed on a first surface of the first layer substantially within the central region, and first adsorbent beads are coupled to the first adhesive. A second layer has a first sheet of filter material having a second perimeter region, wherein the first perimeter region and the second perimeter region are bonded. A third layer has a second sheet of filter material having a third perimeter region, wherein the first perimeter region and the third perimeter region are bonded. The base layer, second layer, and third layer are substantially coextensive.