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Expired European patentEurope

Image processing with noise enhancing operators for moiré reduction and/or random dot generation

EP 0402162 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 June 8, 1990 and granted November 20, 1996. A European patent lasts at most 20 years from filing, so its term ended June 8, 2010.
  • 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 8, 2015.
  • 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 8, 1990
PublishedDecember 12, 1990
GrantedNovember 20, 1996
Term endedJune 8, 2010
Application numberEP 90306251
Classification (CPC)H04N1/40075 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedJune 8, 1990PublishedDec 12, 1990Patent grantedNov 20, 1996Term endedJune 8, 2010

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.