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. 20, 1982
Filed:
May. 09, 1980
Applicant:
Inventors:
Tadaaki Taira, Fukuyama, JP;
Toshio Ishihara, Fukuyama, JP;
Hiromichi Itoshima, Fukuyama, JP;
Yutaka Mihara, Tokyo, JP;
Takashi Kogawa, Kawasaki, JP;
Assignee:
Nippon Kokan Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72412 ; 72367 ; 72416 ;
Abstract
For producing steel pipe from thick steel plate, a foreign member is arranged on a die at the center of its caliber in the length thereof such that the member meets the edge groove of the steel, and in such a condition O-ing is carried out thereon, thereby to produce a thick welded pipe having very little the peaking amount.
Taira, Tadaaki. (1982). Method and apparatus for producing thick welded steel pipe (U.S. Patent No. 4339941). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4339941
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile