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Expired European patentEurope

Process for the preparation of alkyl imidazolidinone (meth) acrylates

EP 0829475 B1 · Applicant: ELF ATOCHEM S.A.

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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 4, 1997 and granted July 26, 2000. A European patent lasts at most 20 years from filing, so its term ended September 4, 2017.
  • 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 4, 2023.
  • 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 4, 1997
PublishedMarch 18, 1998
GrantedJuly 26, 2000
Term endedSeptember 4, 2017
Application numberEP 97402064
Classification (CPC)C07D233/32

Timeline

Timeline From EPO dates

1998200020022004200620082010201220142016Application filedSep 4, 1997PublishedMarch 18, 1998Patent grantedJuly 26, 2000Term endedSep 4, 2017

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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