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Expired European patentEurope

Process for the preparation of carboxylic acid esters of beta-formyl-crotylic alcohol by an allyl transposition

EP 0009159 B1 · Applicant: BASF 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 September 3, 1979 and granted September 23, 1981. A European patent lasts at most 20 years from filing, so its term ended September 3, 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 March 3, 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.
FiledSeptember 3, 1979
PublishedApril 2, 1980
GrantedSeptember 23, 1981
Term endedSeptember 3, 1999
Application numberEP 79103247
Classification (CPC)C07C67/293 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedSep 3, 1979PublishedApril 2, 1980Patent grantedSep 23, 1981Term endedSep 3, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.