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Expired European patentEurope

Digital signal processing apparatus

EP 0881831 B1 · Applicant: Sony United Kingdom Limited

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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 May 13, 1993 and granted July 17, 2002. A European patent lasts at most 20 years from filing, so its term ended May 13, 2013.
  • 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 November 13, 2018.
  • 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.
FiledMay 13, 1993
PublishedDecember 2, 1998
GrantedJuly 17, 2002
Term endedMay 13, 2013
Application numberEP 98202186
Classification (CPC)H04N9/7973 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedMay 13, 1993PublishedDec 2, 1998Patent grantedJuly 17, 2002Term endedMay 13, 2013

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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