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Expired European patentEurope

A method of removing carbon dioxide from a gas stream

EP 0085809 B1 · Applicant: Cheh, Christopher Huk-Shi

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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 7, 1982 and granted August 19, 1987. A European patent lasts at most 20 years from filing, so its term ended December 7, 2002.
  • 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 7, 2008.
  • 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 7, 1982
PublishedAugust 17, 1983
GrantedAugust 19, 1987
Term endedDecember 7, 2002
Application numberEP 82306503
Classification (CPC)G21F9/02 +1 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedDec 7, 1982PublishedAug 17, 1983Patent grantedAug 19, 1987Term endedDec 7, 2002

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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