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Expired European patentEurope

Circuit for noise elimination in stereo broadcast signals

EP 0558910 B1 · Applicant: Blaupunkt-Werke GmbH

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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 January 25, 1993 and granted May 19, 1999. A European patent lasts at most 20 years from filing, so its term ended January 25, 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 July 25, 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.
FiledJanuary 25, 1993
PublishedSeptember 8, 1993
GrantedMay 19, 1999
Term endedJanuary 25, 2013
Application numberEP 93101057
Classification (CPC)H04B1/1661

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedJan 25, 1993PublishedSep 8, 1993Patent grantedMay 19, 1999Term endedJan 25, 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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