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Expired European patentEurope

Process for isolating and purifying a fraction capable of inhibiting mutagenicity of a mutagenic material from burdock juice

EP 0040641 B1 · Applicant: KANEBO, 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 26, 1980 and granted July 4, 1984. A European patent lasts at most 20 years from filing, so its term ended November 26, 2000.
  • 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 26, 2006.
  • 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 26, 1980
PublishedDecember 2, 1981
GrantedJuly 4, 1984
Term endedNovember 26, 2000
Application numberEP 80902301
Classification (CPC)A61K36/28

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedNov 26, 1980PublishedDec 2, 1981Patent grantedJuly 4, 1984Term endedNov 26, 2000

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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