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Expired European patentEurope

Separating argon/oxygen mixtures

EP 0321163 B1 · Applicant: AIR PRODUCTS AND CHEMICALS, INC.

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Overview

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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 December 9, 1988 and granted August 21, 1996. A European patent lasts at most 20 years from filing, so its term ended December 9, 2008.
  • 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 June 9, 2014.
  • 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.
FiledDecember 9, 1988
PublishedJune 21, 1989
GrantedAugust 21, 1996
Term endedDecember 9, 2008
Application numberEP 88311713
Classification (CPC)F25J3/04412 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedDec 9, 1988PublishedJune 21, 1989Patent grantedAug 21, 1996Term endedDec 9, 2008

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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