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Expired European patentEurope

Chlordioxide containing agent against fishparasites

EP 0544950 B1 · Applicant: JAPAN PET DRUGS CO., LTD.

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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 November 29, 1991 and granted January 15, 1997. A European patent lasts at most 20 years from filing, so its term ended November 29, 2011.
  • 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 May 29, 2017.
  • 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.
FiledNovember 29, 1991
PublishedJune 9, 1993
GrantedJanuary 15, 1997
Term endedNovember 29, 2011
Application numberEP 91311153
Classification (CPC)A61K33/40

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedNov 29, 1991PublishedJune 9, 1993Patent grantedJan 15, 1997Term endedNov 29, 2011

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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