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:
Aug. 09, 2011
Filed:
May. 23, 2008
Christian Hassmann, Mittelneufnach, DE;
Hans-jürgen Meitinger, Grossaitingen, DE;
Kurt Plötz, Waldems, DE;
Jürgen Umminger, Lauda-Königshofen, DE;
Michael Schöps, Berlin, DE;
Christian Hassmann, Mittelneufnach, DE;
Hans-Jürgen Meitinger, Grossaitingen, DE;
Kurt Plötz, Waldems, DE;
Jürgen Umminger, Lauda-Königshofen, DE;
Michael Schöps, Berlin, DE;
Johns Manville, Denver, CO (US);
Abstract
The present invention relates to a filter composed of a multi-ply filter medium, which comprises at least one non-woven stiffening layer, at least one filtration layer, at least one covering layer and where necessary at least one non-woven microfiber layer, the non-woven stiffening layer comprising fibers of synthetic polymers and the fibers being both partially oriented and oriented fibers.