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Expired European patentEurope

Process for the generation and storage of digitized threshold density values for the scanning of a half-tone image pattern

EP 0539397 B1 · Applicant: LINOTYPE-HELL AG

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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 July 10, 1991 and granted August 30, 1995. A European patent lasts at most 20 years from filing, so its term ended July 10, 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 January 10, 2017.
  • 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.
FiledJuly 10, 1991
PublishedMay 5, 1993
GrantedAugust 30, 1995
Term endedJuly 10, 2011
Application numberEP 91911800
Classification (CPC)H04N1/4058

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJuly 10, 1991PublishedMay 5, 1993Patent grantedAug 30, 1995Term endedJuly 10, 2011

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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