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Expired European patentEurope

Dry toner with mixed azo dye charge control agent

EP 0629920 B1 · Applicant: LEXMARK INTERNATIONAL, INC.

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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 13, 1994 and granted September 1, 1999. A European patent lasts at most 20 years from filing, so its term ended June 13, 2014.
  • 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 13, 2019.
  • 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 13, 1994
PublishedDecember 21, 1994
GrantedSeptember 1, 1999
Term endedJune 13, 2014
Application numberEP 94304267
Classification (CPC)G03G9/091

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 13, 1994PublishedDec 21, 1994Patent grantedSep 1, 1999Term endedJune 13, 2014

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.