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. 15, 1991
Filed:
Dec. 08, 1989
Yoshihisa Ohashi, Takarazuka, JP;
Mutsuo Nakanishi, Kobe, JP;
Shigeharu Takai, Nishinomiya, JP;
Junichi Kikuchi, Nishinomiya, JP;
Tadashi Fukuda, Amagasaki, JP;
Nobushige Hiraishi, Nishinomiya, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
A process for manufacturing clad metal tubing from two different types of metals having different deformation resistances is disclosed. The process comprises preparing a combined billet having two blank pipes arranged concentrically with each other, the pipes being made of different metals, and applying hot extrusion to the billet while adjusting the heating temperature of the pipe such that a pipe of the metal having a higher deformation resistance is heated to a higher temperature.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile