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Expired European patentEurope

Cold-cathode electron source element and method for producing the same

EP 0681312 B1 · Applicant: TDK Corporation

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Overview

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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 22, 1994 and granted February 26, 2003. A European patent lasts at most 20 years from filing, so its term ended November 22, 2014.
  • 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 22, 2020.
  • 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 22, 1994
PublishedNovember 8, 1995
GrantedFebruary 26, 2003
Term endedNovember 22, 2014
Application numberEP 95900936
Classification (CPC)H01J9/025 +1 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedNov 22, 1994PublishedNov 8, 1995Patent grantedFeb 26, 2003Term endedNov 22, 2014

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.