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Expired European patentEurope

Novel prodrugs of biologically active agents containing mercapto groups, process for preparing and therapeutically effective composition containing the same

EP 0038541 B1 · Applicant: Merck & 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 April 16, 1981 and granted August 13, 1986. A European patent lasts at most 20 years from filing, so its term ended April 16, 2001.
  • 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 October 16, 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.
FiledApril 16, 1981
PublishedOctober 28, 1981
GrantedAugust 13, 1986
Term endedApril 16, 2001
Application numberEP 81102940
Classification (CPC)C07D233/84 +2 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedApril 16, 1981PublishedOct 28, 1981Patent grantedAug 13, 1986Term endedApril 16, 2001

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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