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Expired European patentEurope

Process for the purification of mercapto benzothiazole

EP 0015802 B1 · Applicant: ELF ATOCHEM S.A.

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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 February 19, 1980 and granted May 30, 1984. A European patent lasts at most 20 years from filing, so its term ended February 19, 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 August 19, 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.
FiledFebruary 19, 1980
PublishedSeptember 17, 1980
GrantedMay 30, 1984
Term endedFebruary 19, 2000
Application numberEP 80400231
Classification (CPC)C07D277/72

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedFeb 19, 1980PublishedSep 17, 1980Patent grantedMay 30, 1984Term endedFeb 19, 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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