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:
Sep. 27, 2005
Filed:
Aug. 02, 2001
Takaaki Toyooka, Tokyo, JP;
Takatoshi Okabe, Tokyo, JP;
Motoaki Itadani, Tokyo, JP;
Masatoshi Aratani, Tokyo, JP;
Osamu Kondo, Tokyo, JP;
Takaaki Toyooka, Tokyo, JP;
Takatoshi Okabe, Tokyo, JP;
Motoaki Itadani, Tokyo, JP;
Masatoshi Aratani, Tokyo, JP;
Osamu Kondo, Tokyo, JP;
JFE Steel Corporation, Tokyo, JP;
Abstract
An impeder, for manufacturing a welded pipe, including an insulating casecontaining laminationshaving coated steel sheetsformed by providing an insulating coating on untreated steel sheets having a thickness of 0.3 mm or less and an insulating casecontaining the laminations, wherein the steel sheets contain 1.5-20% of Cr, 2.5-10% of Si, and 100 ppm or less of C and N in total, or further contain one or more of Al, Mn, and P, where the content of Al is 5% or less and the content of each of Mn and P is 1% or less, the remainder being Fe and unavoidable impurities; and preferably have a resistivity of 60 μΩ·cm or more.