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European application, no grantEurope

Process of preparing unsaturated carboxylic acid amides

EP 0321256 A2 · Applicant: MITSUI TOATSU CHEMICALS, Inc.

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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 December 16, 1988 and never granted as a European patent. Had it been granted, its 20-year term would have ended December 16, 2008.
  • 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 June 16, 2014.
  • 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.
FiledDecember 16, 1988
PublishedJune 21, 1989
GrantedNever granted
Term endedDecember 16, 2008
Application numberEP 88311899
Classification (CPC)C07D295/182

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

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