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Expired European patentEurope

Method for the automatic ranging of detector addresses by an alarm system

EP 0489346 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 November 27, 1991 and granted September 25, 1996. A European patent lasts at most 20 years from filing, so its term ended November 27, 2011.
  • 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 May 27, 2017.
  • 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.
FiledNovember 27, 1991
PublishedJune 10, 1992
GrantedSeptember 25, 1996
Term endedNovember 27, 2011
Application numberEP 91120252
Classification (CPC)H04L12/10 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedNov 27, 1991PublishedJune 10, 1992Patent grantedSep 25, 1996Term endedNov 27, 2011

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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