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. 04, 2009
Filed:
Oct. 13, 2003
Herbert Gunther, Allendorf, DE;
Christel Kretschmar, Borthen, DE;
Uwe Partsch, Dresden, DE;
Peter Otschik, Possendorf, DE;
Herbert Gunther, Allendorf, DE;
Christel Kretschmar, Borthen, DE;
Uwe Partsch, Dresden, DE;
Peter Otschik, Possendorf, DE;
Gunther GmbH & Co., Metallverarbeitung, Frankenberg/Eder, DE;
Abstract
A compound body comprises a steel base element on which is deposited a heater layer. The base element is made of a precipitation hardening steel. In the form of a manifold or material feed tube in a hot duct system, said base element comprises a round or convex surface receiving the heater layer. This heater layer is a compound layer having several strata and/or strata elements which are thick film pastes or sheets and in such form are consecutively deposited, dried and baked-on. The pre-compression generated in this process in the heater layer is increased in controlled manner by precipitation hardening the base element.