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Expired European patentEurope

Distillation column

EP 1756497 B1 · Applicant: L'AIR LIQUIDE, Société Anonyme 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 May 30, 2005 and granted January 10, 2018. A European patent lasts at most 20 years from filing, so its term ended May 30, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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, 2005
PublishedFebruary 28, 2007
GrantedJanuary 10, 2018
Term endedMay 30, 2025
Application numberEP 05750225
Classification (CPC)B01J19/32

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedMay 30, 2005PublishedFeb 28, 2007Patent grantedJan 10, 2018Term endedMay 30, 2025

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.