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:
Oct. 28, 2014
Filed:
Aug. 27, 2009
Klaus Veeser, Weinheim, DE;
Martin Krause, Hirschberg, DE;
Toan-hieu Giang, Viernheim, DE;
Jochen Zabold, Birkenau, DE;
Klaus Veeser, Weinheim, DE;
Martin Krause, Hirschberg, DE;
Toan-Hieu Giang, Viernheim, DE;
Jochen Zabold, Birkenau, DE;
Carl Freudenberg KG, Weinheim, DE;
Abstract
A method for manufacturing an electret filter element includes preparing fibers and producing, by a spray device, a spray mist of fluid droplets which include an electrical charge formed by an electric field between detaching fluid droplets and a counter-electrode. The fibers are passed through the spray mist so as to wet the fibers with the fluid droplets. The fibers are laid down to form a fibrous layer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile