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Expired European patentEurope

Trans-4-alkyloxymethyl-1-(4'-substituted biphenylyl-4)cyclohexanes and liquid crystal compositions containing the same

EP 0096850 B1 · Applicant: Chisso Corporation

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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 June 9, 1983 and granted September 25, 1985. A European patent lasts at most 20 years from filing, so its term ended June 9, 2003.
  • 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 December 9, 2008.
  • 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.
FiledJune 9, 1983
PublishedDecember 28, 1983
GrantedSeptember 25, 1985
Term endedJune 9, 2003
Application numberEP 83105659
Classification (CPC)C07C29/147 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJune 9, 1983PublishedDec 28, 1983Patent grantedSep 25, 1985Term endedJune 9, 2003

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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