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Expired European patentEurope

Method for maufacturing welded pipes

EP 0243533 B1 · Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 May 30, 1983 and granted March 27, 1991. A European patent lasts at most 20 years from filing, so its term ended May 30, 2003.
  • 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 November 30, 2008.
  • 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.
FiledMay 30, 1983
PublishedNovember 4, 1987
GrantedMarch 27, 1991
Term endedMay 30, 2003
Application numberEP 86111988
Classification (CPC)B23K20/04 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMay 30, 1983PublishedNov 4, 1987Patent grantedMarch 27, 1991Term endedMay 30, 2003

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.