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Expired European patentEurope

Biometrical authentication in a communication system

EP 1507431 B1 · Applicant: Semiconductor Energy Laboratory Co., 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 May 11, 2001 and granted August 12, 2009. A European patent lasts at most 20 years from filing, so its term ended May 11, 2021.
  • 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.
FiledMay 11, 2001
PublishedFebruary 16, 2005
GrantedAugust 12, 2009
Term endedMay 11, 2021
Application numberEP 04027785
Classification (CPC)G07C9/37 +2 more

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedMay 11, 2001PublishedFeb 16, 2005Patent grantedAug 12, 2009Term endedMay 11, 2021

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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