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Expired European patentEurope

Transistor with workfunction-induced charge layer

EP 1709689 B1 · Applicant: Acorn Technologies, Inc.

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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 December 14, 2004 and granted December 10, 2014. A European patent lasts at most 20 years from filing, so its term ended December 14, 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.
FiledDecember 14, 2004
PublishedOctober 11, 2006
GrantedDecember 10, 2014
Term endedDecember 14, 2024
Application numberEP 04814157
Classification (CPC)H10D62/151 +2 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedDec 14, 2004PublishedOct 11, 2006Patent grantedDec 10, 2014Term endedDec 14, 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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