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. 24, 2013
Filed:
Apr. 27, 2011
Andre Bertram, Bielefeld, DE;
Seyfettin Kara, Spenge, DE;
Monika Seifert, Detmold, DE;
Stefan Tiekoetter, Bielefeld, DE;
Cornelius Wolf, Bielefeld, DE;
Andre Bertram, Bielefeld, DE;
Seyfettin Kara, Spenge, DE;
Monika Seifert, Detmold, DE;
Stefan Tiekoetter, Bielefeld, DE;
Cornelius Wolf, Bielefeld, DE;
Miele & Cie. KG, Guetersloh, DE;
Abstract
A filter includes a filter medium, a filter inlet side, a filter outlet side and an indicator device. The indicator device is configured to be acted upon by air flow through the filter and is disposed adjacent to the filter medium and extends from the filter inlet side to the filter outlet side. The indicator device includes an air path starting from the filter inlet side, a viewing window covering the air path on the filter outlet side, and a flow-through usage indicator configured to receive filtered material and disposed in the air path and visible beneath the viewing window on the filter outlet side.