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Expired European patentEurope

Control of data flow in a network

EP 1844583 B1 · Applicant: British Telecommunications Public Limited Company

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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 31, 2006 and granted December 16, 2009. A European patent lasts at most 20 years from filing, so its term ended January 31, 2026.
  • 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.
FiledJanuary 31, 2006
PublishedOctober 17, 2007
GrantedDecember 16, 2009
Term endedJanuary 31, 2026
Application numberEP 06704070
Classification (CPC)H04L69/16 +2 more

Timeline

Timeline From EPO dates

2007200920112013201520172019202120232025Application filedJan 31, 2006PublishedOct 17, 2007Patent grantedDec 16, 2009Term endedJan 31, 2026

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.