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Expired European patentEurope

Audio signal processors

EP 1051879 B1 · Applicant: IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY & MEDICINE

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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 January 8, 1999 and granted September 21, 2005. A European patent lasts at most 20 years from filing, so its term ended January 8, 2019.
  • 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 8, 2024.
  • 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 8, 1999
PublishedNovember 15, 2000
GrantedSeptember 21, 2005
Term endedJanuary 8, 2019
Application numberEP 99900555
Classification (CPC)H04R3/00 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedJan 8, 1999PublishedNov 15, 2000Patent grantedSep 21, 2005Term endedJan 8, 2019

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.