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:
May. 07, 1985
Filed:
Sep. 14, 1983
Applicant:
Inventors:
Georg Blatt, Ingolstadt, DE;
Johannes van den Boom, Kosching, DE;
Geert Kuipers, Ingolstadt, DE;
Heinz Hollerweger, Ingolstadt, DE;
Assignee:
Audi NSU Auto Union A.G., Ingolstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E04B / ;
U.S. Cl.
CPC ...
181290 ; 181286 ; 181288 ;
Abstract
The invention relates to a noise reduction lining of the kind for use in passenger compartments of automobiles for absorbing engine noise of five or six cylinder combustion engines, and comprises between a cover layer and a base layer an absorption layer of open-pored elastic material into which is embedded a perforsted extinction layer.