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:
Mar. 10, 1992
Filed:
Feb. 20, 1990
Heinrich K Feichtinger, Hinteregg, DE;
Gerald Stein, Essen, DE;
Marcus O Speidel, Birnenstorf, DE;
Joachim Menzel, Essen, DE;
Vereinigte Schmiedewerke GmbH, Osnabruck, DE;
Abstract
A method of manufacturing high strength and hard metallic composite layer materials by connecting several metal layers with one another, includes forming the metal layers as flat products by rolling from a metal with low base strength, alloying and hardening the flat products over their whole cross-section with a metalloid by heat treatment in a metalloid containing gas atmosphere, then connecting the flat products with one another by diffusion welding. As metalloids preferably nitrogen, boron and carbon are used. Diffusion welding is performed by hot isostatic pressure method.