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Expired European patentEurope

Heat exchanger with double barrier

EP 0072736 B1 · Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel

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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 August 4, 1982 and granted July 4, 1984. A European patent lasts at most 20 years from filing, so its term ended August 4, 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 February 4, 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.
FiledAugust 4, 1982
PublishedFebruary 23, 1983
GrantedJuly 4, 1984
Term endedAugust 4, 2002
Application numberEP 82401472
Classification (CPC)F28D7/0008

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedAug 4, 1982PublishedFeb 23, 1983Patent grantedJuly 4, 1984Term endedAug 4, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.