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Expired European patentEurope

Tryptophane derivative and process for preparing same

EP 0051071 B1 · Applicant: AJINOMOTO CO., INC.

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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 November 15, 1979 and granted February 20, 1985. A European patent lasts at most 20 years from filing, so its term ended November 15, 1999.
  • 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 15, 2005.
  • 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 15, 1979
PublishedMay 12, 1982
GrantedFebruary 20, 1985
Term endedNovember 15, 1999
Application numberEP 79901543
Classification (CPC)C12P21/02 +2 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedNov 15, 1979PublishedMay 12, 1982Patent grantedFeb 20, 1985Term endedNov 15, 1999

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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