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Expired European patentEurope

Oxadithiadiazapentalenes, their preparation, fungicidal compositions containing them and the control of fungi using them

EP 0003261 B1 · Applicant: CHEVRON RESEARCH COMPANY

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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 13, 1978 and granted December 30, 1981. A European patent lasts at most 20 years from filing, so its term ended December 13, 1998.
  • 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 13, 2004.
  • 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 13, 1978
PublishedAugust 8, 1979
GrantedDecember 30, 1981
Term endedDecember 13, 1998
Application numberEP 78300814
Classification (CPC)C07D513/04 +2 more

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedDec 13, 1978PublishedAug 8, 1979Patent grantedDec 30, 1981Term endedDec 13, 1998

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.