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Expired European patentEurope

Non-return valve for pulsating burners

EP 0130211 B1 · Applicant: MARECK B.V.

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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 30, 1983 and granted May 27, 1987. A European patent lasts at most 20 years from filing, so its term ended December 30, 2003.
  • 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 30, 2009.
  • 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 30, 1983
PublishedJanuary 9, 1985
GrantedMay 27, 1987
Term endedDecember 30, 2003
Application numberEP 84900417
Classification (CPC)F23C15/00

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedDec 30, 1983PublishedJan 9, 1985Patent grantedMay 27, 1987Term endedDec 30, 2003

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.