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Expired European patentEurope

Method for regulating the pump power of an optical amplifier

EP 1695467 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 December 15, 2004 and granted February 25, 2009. A European patent lasts at most 20 years from filing, so its term ended December 15, 2024.
  • 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 15, 2004
PublishedAugust 30, 2006
GrantedFebruary 25, 2009
Term endedDecember 15, 2024
Application numberEP 04804860
Classification (CPC)H04B10/2931 +2 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedDec 15, 2004PublishedAug 30, 2006Patent grantedFeb 25, 2009Term endedDec 15, 2024

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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