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Expired European patentEurope

Differentiation method in the processing of alarm signals

EP 0874342 B1 · Applicant: Deutsche Telekom AG

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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 February 20, 1998 and granted July 31, 2002. A European patent lasts at most 20 years from filing, so its term ended February 20, 2018.
  • 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 August 20, 2023.
  • 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.
FiledFebruary 20, 1998
PublishedOctober 28, 1998
GrantedJuly 31, 2002
Term endedFebruary 20, 2018
Application numberEP 98102965
Classification (CPC)G08B29/18

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedFeb 20, 1998PublishedOct 28, 1998Patent grantedJuly 31, 2002Term endedFeb 20, 2018

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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