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Expired European patentEurope

Power circuit and method of rising output voltage of power circuit

EP 1690331 B1 · Applicant: Ricoh Company, Ltd.

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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 30, 2004 and granted October 27, 2010. A European patent lasts at most 20 years from filing, so its term ended November 30, 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 30, 2004
PublishedAugust 16, 2006
GrantedOctober 27, 2010
Term endedNovember 30, 2024
Application numberEP 04819954
Classification (CPC)H02M1/36 +1 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedNov 30, 2004PublishedAug 16, 2006Patent grantedOct 27, 2010Term endedNov 30, 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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