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Expired European patentEurope

Method and apparatus used to diminish russet-red fumes in an oxycutting operation

EP 1052050 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 April 19, 2000 and granted May 19, 2004. A European patent lasts at most 20 years from filing, so its term ended April 19, 2020.
  • 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 October 19, 2025.
  • 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.
FiledApril 19, 2000
PublishedNovember 15, 2000
GrantedMay 19, 2004
Term endedApril 19, 2020
Application numberEP 00401091
Classification (CPC)B23K7/08

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedApril 19, 2000PublishedNov 15, 2000Patent grantedMay 19, 2004Term endedApril 19, 2020

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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