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Expired European patentEurope

Method and apparatus for estimating halftone image from binary image

EP 0200534 B1 · Applicant: KONICA CORPORATION

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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 April 29, 1986 and granted April 19, 1995. A European patent lasts at most 20 years from filing, so its term ended April 29, 2006.
  • 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 29, 2011.
  • 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 29, 1986
PublishedNovember 5, 1986
GrantedApril 19, 1995
Term endedApril 29, 2006
Application numberEP 86303257
Classification (CPC)H04N1/40075

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedApril 29, 1986PublishedNov 5, 1986Patent grantedApril 19, 1995Term endedApril 29, 2006

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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