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. 27, 1999
Filed:
Oct. 11, 1996
Ryouichi Ikeda, Osaka, JP;
Minoru Komura, Osaka, JP;
Yoshihiro Okano, Tokyo, JP;
Norio Shoji, Tokyo, JP;
Toshiyuki Namioka, Kanagawa, JP;
Akio Kida, Tokyo, JP;
Kiyotaka Hirahara, Hyogo, JP;
Nitto Denko Corporation, Osaka, JP;
Nippon Kokan Co., Ltd., Tokyo, JP;
Nippon Kokan Koji Kabushiki Kaisha, Kanagawa, JP;
Abstract
In a joint between welded end portions of corrosion-protectively coated steel pipes, a heat-shrinkable tube is positioned so as to cover the outer circumference of a welded portion and the outer circumferences of its adjacent portions, and the heat-shrinkable tube is thermally shrunk in a state in which a gap between the heat-shrinkable tube and the aforementioned portions is kept in a vacuum so that the aforementioned portions are corrosion-protectively coated with the heat-shrinkable outer layer of the heat-shrinkable tube thus thermally shrunk.