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Expired European patentEurope

Method and apparatus for the resolution enhancement of gray scale images that include text and line art

EP 0768792 B1 · Applicant: XEROX 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 September 20, 1996 and granted July 24, 2002. A European patent lasts at most 20 years from filing, so its term ended September 20, 2016.
  • 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 March 20, 2022.
  • 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.
FiledSeptember 20, 1996
PublishedApril 16, 1997
GrantedJuly 24, 2002
Term endedSeptember 20, 2016
Application numberEP 96306847
Classification (CPC)G06T3/403 +1 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedSep 20, 1996PublishedApril 16, 1997Patent grantedJuly 24, 2002Term endedSep 20, 2016

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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