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Expired European patentEurope

A multi-level quantizer with current mode DEM switch matrices and separate DEM decision logic for a multibit sigma delta modulator

EP 1819044 B1 · Applicant: Nokia Corporation

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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 12, 2002 and granted April 22, 2009. A European patent lasts at most 20 years from filing, so its term ended June 12, 2022.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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 12, 2002
PublishedAugust 15, 2007
GrantedApril 22, 2009
Term endedJune 12, 2022
Application numberEP 07108826
Classification (CPC)H03M1/066

Timeline

Timeline From EPO dates

2003200520072009201120132015201720192021Application filedJune 12, 2002PublishedAug 15, 2007Patent grantedApril 22, 2009Term endedJune 12, 2022

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

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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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