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Expired European patentEurope

Colour ribbon for dye transfer by heat reaction

EP 0256971 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 13, 1987 and granted May 2, 1990. A European patent lasts at most 20 years from filing, so its term ended August 13, 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 February 13, 2013.
  • 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 13, 1987
PublishedFebruary 24, 1988
GrantedMay 2, 1990
Term endedAugust 13, 2007
Application numberEP 87730092
Classification (CPC)B41M5/423

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedAug 13, 1987PublishedFeb 24, 1988Patent grantedMay 2, 1990Term endedAug 13, 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

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