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Expired European patentEurope

Process and plant for separating a gas mixture by cryogenic distillation

EP 0678317 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 10, 1995 and granted February 20, 2002. A European patent lasts at most 20 years from filing, so its term ended April 10, 2015.
  • 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 10, 2020.
  • 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 10, 1995
PublishedOctober 25, 1995
GrantedFebruary 20, 2002
Term endedApril 10, 2015
Application numberEP 95400804
Classification (CPC)F25J3/04412 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedApril 10, 1995PublishedOct 25, 1995Patent grantedFeb 20, 2002Term endedApril 10, 2015

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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