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:
Nov. 08, 2005
Filed:
Feb. 04, 2004
Applicants:
Kazuo Taguchi, Tokyo, JP;
Toshio Ohta, Tokyo, JP;
Inventors:
Kazuo Taguchi, Tokyo, JP;
Toshio Ohta, Tokyo, JP;
Assignee:
Furukawa-Sky Aluminum Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22F001/04 ;
U.S. Cl.
CPC ...
Abstract
Disclosed are aluminum alloy hollow materials and processes for producing the same wherein an aluminum alloy hollow material is produced by subjecting an ingot of an aluminum alloy containing 0.3˜1.5 wt % Mn to port hole extrusion or port hole extrusion and drawing-elongation processing and wherein a difference in electric conductivity between individual portions in lengthwise direction of the hollow material is not more than 1.0 IACS %. According to the aluminum alloy hollow materials, preferential corrosion in welding potions in port hole extrusion can be prevented.