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Expired European patentEurope

Method of detecting root gap and arc welding method using the former

EP 1013370 B1 · Applicant: NKK CORPORATION

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Overview

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed March 26, 1998 and granted July 30, 2003. A European patent lasts at most 20 years from filing, so its term ended March 26, 2018.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by September 26, 2023.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledMarch 26, 1998
PublishedJune 28, 2000
GrantedJuly 30, 2003
Term endedMarch 26, 2018
Application numberEP 98911014
Classification (CPC)B23K9/095 +1 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedMarch 26, 1998PublishedJune 28, 2000Patent grantedJuly 30, 2003Term endedMarch 26, 2018

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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