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Expired European patentEurope

Co-doping for fermi level control in semi-insulating group iii nitrides

EP 1709669 B1 · Applicant: Cree, 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 September 28, 2004 and granted November 21, 2018. A European patent lasts at most 20 years from filing, so its term ended September 28, 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.
FiledSeptember 28, 2004
PublishedOctober 11, 2006
GrantedNovember 21, 2018
Term endedSeptember 28, 2024
Application numberEP 04789255
Classification (CPC)H10P14/3444 +2 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedSep 28, 2004PublishedOct 11, 2006Patent grantedNov 21, 2018Term endedSep 28, 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

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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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