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Electrophilic substitution of triphenylene-based discotic liquid crystals

EP 0751925 A1 · Applicant: THE UNIVERSITY OF LEEDS

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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 23, 1995 and never granted as a European patent. Had it been granted, its 20-year term would have ended March 23, 2015.
  • 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 23, 2020.
  • 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 23, 1995
PublishedJanuary 8, 1997
GrantedNever granted
Term endedMarch 23, 2015
Application numberEP 95912341
Classification (CPC)C07C247/16 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedMarch 23, 1995PublishedJan 8, 1997Term endedMarch 23, 2015

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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