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Expired European patentEurope

Liquid crystalline medium

EP 0445274 B1 · Applicant: MERCK PATENT GmbH

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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 August 18, 1990 and granted January 18, 1995. A European patent lasts at most 20 years from filing, so its term ended August 18, 2010.
  • 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 February 18, 2016.
  • 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.
FiledAugust 18, 1990
PublishedSeptember 11, 1991
GrantedJanuary 18, 1995
Term endedAugust 18, 2010
Application numberEP 90914700
Classification (CPC)C09K19/3001 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedAug 18, 1990PublishedSep 11, 1991Patent grantedJan 18, 1995Term endedAug 18, 2010

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.