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Expired European patentEurope

Operation of operating devices for light sources using switch modulation of a DC bus

EP 1843641 B1 · Applicant: Tridonic GmbH & Co KG

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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 25, 2004 and granted March 16, 2016. A European patent lasts at most 20 years from filing, so its term ended November 25, 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.
FiledNovember 25, 2004
PublishedOctober 10, 2007
GrantedMarch 16, 2016
Term endedNovember 25, 2024
Application numberEP 07109703
Classification (CPC)H05B41/245 +2 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedNov 25, 2004PublishedOct 10, 2007Patent grantedMarch 16, 2016Term endedNov 25, 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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