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Expired European patentEurope

Process and gas mixture for arc welding aluminium workpieces

EP 0761380 B1 · Applicant: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE

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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 September 6, 1996 and granted December 8, 1999. A European patent lasts at most 20 years from filing, so its term ended September 6, 2016.
  • 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 March 6, 2022.
  • 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.
FiledSeptember 6, 1996
PublishedMarch 12, 1997
GrantedDecember 8, 1999
Term endedSeptember 6, 2016
Application numberEP 96401915
Classification (CPC)B23K35/383

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedSep 6, 1996PublishedMarch 12, 1997Patent grantedDec 8, 1999Term endedSep 6, 2016

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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