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Expired European patentEurope

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EP 0449400 B1 · Applicant: CROSFIELD ELECTRONICS LIMITED

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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.

Why it's free to use

  • Filed January 22, 1991 and granted December 29, 1997. A European patent lasts at most 20 years from filing, so its term ended January 22, 2011.
  • 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 July 22, 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.
FiledJanuary 22, 1991
PublishedOctober 2, 1991
GrantedDecember 29, 1997
Term endedJanuary 22, 2011
Application numberEP 91300466
Classification (CPC)G06T11/10

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJan 22, 1991PublishedOct 2, 1991Patent grantedDec 29, 1997Term endedJan 22, 2011

Sources & verification