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Expired European patentEurope

Process for the preparation of 3-alkyl-6-methyl-beta-resorcylic-acid esters

EP 0074497 B1 · Applicant: HÜLS TROISDORF AKTIENGESELLSCHAFT

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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 August 12, 1982 and granted November 27, 1985. A European patent lasts at most 20 years from filing, so its term ended August 12, 2002.
  • 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 February 12, 2008.
  • 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.
FiledAugust 12, 1982
PublishedMarch 23, 1983
GrantedNovember 27, 1985
Term endedAugust 12, 2002
Application numberEP 82107318
Classification (CPC)C07C67/333

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedAug 12, 1982PublishedMarch 23, 1983Patent grantedNov 27, 1985Term endedAug 12, 2002

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.