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Expired European patentEurope

The method of controlling the user calling load in soft switch system

EP 1583338 B1 · Applicant: ZTE Corporation

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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 December 23, 2003 and granted October 29, 2008. A European patent lasts at most 20 years from filing, so its term ended December 23, 2023.
  • 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.
FiledDecember 23, 2003
PublishedOctober 5, 2005
GrantedOctober 29, 2008
Term endedDecember 23, 2023
Application numberEP 03785459
Classification (CPC)H04M3/36

Timeline

Timeline From EPO dates

2004200620082010201220142016201820202022Application filedDec 23, 2003PublishedOct 5, 2005Patent grantedOct 29, 2008Term endedDec 23, 2023

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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