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Expired European patentEurope

Mesomorphous polymers with highly dielectrical anisotropie lateral chains, and process for their preparation

EP 0241338 B1 · Applicant: THOMSON-CSF

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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 19, 1987 and granted September 5, 1990. A European patent lasts at most 20 years from filing, so its term ended March 19, 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 19, 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 19, 1987
PublishedOctober 14, 1987
GrantedSeptember 5, 1990
Term endedMarch 19, 2007
Application numberEP 87400620
Classification (CPC)C07C255/00 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMarch 19, 1987PublishedOct 14, 1987Patent grantedSep 5, 1990Term endedMarch 19, 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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