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Expired European patentEurope

Combustion process, applicable in cement production

EP 1065461 B1 · Applicant: L'air Liquide, S.A. à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés 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 June 20, 2000 and granted March 17, 2004. A European patent lasts at most 20 years from filing, so its term ended June 20, 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 December 20, 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.
FiledJune 20, 2000
PublishedJanuary 3, 2001
GrantedMarch 17, 2004
Term endedJune 20, 2020
Application numberEP 00401748
Classification (CPC)F27B7/36

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedJune 20, 2000PublishedJan 3, 2001Patent grantedMarch 17, 2004Term endedJune 20, 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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