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Expired European patentEurope

A method of halftoning digitized grey value images and an image processing device suitable for performing such a method

EP 0625844 B1 · Applicant: Océ-Technologies B.V.

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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 April 5, 1994 and granted February 24, 1999. A European patent lasts at most 20 years from filing, so its term ended April 5, 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 October 5, 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.
FiledApril 5, 1994
PublishedNovember 23, 1994
GrantedFebruary 24, 1999
Term endedApril 5, 2014
Application numberEP 94200919
Classification (CPC)H04N1/4052

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedApril 5, 1994PublishedNov 23, 1994Patent grantedFeb 24, 1999Term endedApril 5, 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

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