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Expired European patentEurope

Gas sensor, method of manufacturing the same, and gas sensor system using the gas sensor

EP 1004877 B1 · Applicant: NGK SPARK PLUG 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 November 24, 1999 and granted January 7, 2009. A European patent lasts at most 20 years from filing, so its term ended November 24, 2019.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by May 24, 2025.
  • 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 24, 1999
PublishedMay 31, 2000
GrantedJanuary 7, 2009
Term endedNovember 24, 2019
Application numberEP 99309386
Classification (CPC)G01N27/4175

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedNov 24, 1999PublishedMay 31, 2000Patent grantedJan 7, 2009Term endedNov 24, 2019

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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