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:
Jul. 13, 1976
Filed:
Apr. 23, 1975
Applicant:
Inventor:
Hans-Joachim Wallbaum, Osnabruck, DT;
Assignee:
Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft, Hannover, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ; C22F / ;
U.S. Cl.
CPC ...
148 / ; 72258 ; 72363 ; 148 / ;
Abstract
Sheet metal or strips are rolled and heated for dispersion hardening. Disks are cut (punched), stacked, and extruded. The disks in the stack may alternate with disks which have not yet been hardened. Subsequent heat treatment of the extruded product strengthens it throughout. The method is used specifically to make a dispersion-strengthened copper alloy to be used for making electrodes for resistance welding.