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:
Apr. 28, 1981
Filed:
Oct. 19, 1976
Applicant:
Inventor:
Johann Siebels, Wolfsburg, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ; F16L / ; B32B / ;
U.S. Cl.
CPC ...
428 36 ; 428329 ; 428450 ; 428469 ; 428472 ;
Abstract
A thermally insulated article for conducting high temperature gases, such as exhaust gases from an internal combustion engine. The article comprises a core of ceramic material forming a flow passage and a metal jacket cast directly around the core. According to the invention, the ceramic core consists at least partially of a silicate fiber material.