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Expired European patentEurope

Ozone generating apparatus

EP 0246344 B1 · Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA

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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 May 21, 1986 and granted December 27, 1989. A European patent lasts at most 20 years from filing, so its term ended May 21, 2006.
  • 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 November 21, 2011.
  • 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.
FiledMay 21, 1986
PublishedNovember 25, 1987
GrantedDecember 27, 1989
Term endedMay 21, 2006
Application numberEP 86106921
Classification (CPC)C01B13/11

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMay 21, 1986PublishedNov 25, 1987Patent grantedDec 27, 1989Term endedMay 21, 2006

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.