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Expired European patentEurope

Aromatic bismaleimido compounds and process for their preparation

EP 0253891 B1 · 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 18, 1986 and granted April 3, 1991. A European patent lasts at most 20 years from filing, so its term ended December 18, 2006.
  • 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 18, 2012.
  • 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 18, 1986
PublishedJanuary 27, 1988
GrantedApril 3, 1991
Term endedDecember 18, 2006
Application numberEP 87900271
Classification (CPC)C07D207/452

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedDec 18, 1986PublishedJan 27, 1988Patent grantedApril 3, 1991Term endedDec 18, 2006

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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