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. 07, 1986
Filed:
May. 24, 1983
Applicant:
Inventors:
Hans-Ulrich Breitscheidel, Siegburg, DE;
Cosmas Lorry, Niederkassel, DE;
Helmut Rehlen, 7951 Ingoldingen, DE;
Jurgen Roellinghoff, 7950 Mettenburg, DE;
Assignees:
Dynamit Nobel AG, Troisdorf, DE;
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E04F / ; F01N / ;
U.S. Cl.
CPC ...
181224 ; 181252 ; 181286 ; 181290 ; 181291 ; 181294 ;
Abstract
A sound-insulated flow duct is provided with walls made up of a composite of an elastic thermoplastic, predominantly closed-cell foam material as the outer layer and an open-cell, elastic soft foam material as the inner layer.