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Expired European patentEurope

Alpha-Methylcinnamic acid ester derivative and liquid crystal composition

EP 0240184 B1 · Applicant: MITSUBISHI RAYON CO., LTD.

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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 March 10, 1987 and granted August 21, 1991. A European patent lasts at most 20 years from filing, so its term ended March 10, 2007.
  • 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 September 10, 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.
FiledMarch 10, 1987
PublishedOctober 7, 1987
GrantedAugust 21, 1991
Term endedMarch 10, 2007
Application numberEP 87302017
Classification (CPC)C09K19/46 +1 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMarch 10, 1987PublishedOct 7, 1987Patent grantedAug 21, 1991Term endedMarch 10, 2007

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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