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Expired European patentEurope

Adjusting an input signal level of a sigma-delta converter

EP 1801977 B1 · Applicant: Telefonaktiebolaget L M Ericsson AB (Publ)

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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 December 22, 2005 and granted July 15, 2009. A European patent lasts at most 20 years from filing, so its term ended December 22, 2025.
  • 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.
FiledDecember 22, 2005
PublishedJune 27, 2007
GrantedJuly 15, 2009
Term endedDecember 22, 2025
Application numberEP 05388113
Classification (CPC)H03M3/49

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedDec 22, 2005PublishedJune 27, 2007Patent grantedJuly 15, 2009Term endedDec 22, 2025

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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