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Expired European patentEurope

Trench semiconductor device having gate oxide layer with multiple thicknesses and processes of fabricating the same

EP 1186019 B1 · Applicant: Williams, Richard K.

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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 24, 2000 and granted May 12, 2010. A European patent lasts at most 20 years from filing, so its term ended May 24, 2020.
  • 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 November 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.
FiledMay 24, 2000
PublishedMarch 13, 2002
GrantedMay 12, 2010
Term endedMay 24, 2020
Application numberEP 00932771
Classification (CPC)H10D84/148 +2 more

Timeline

Timeline From EPO dates

2001200320052007200920112013201520172019Application filedMay 24, 2000PublishedMarch 13, 2002Patent grantedMay 12, 2010Term endedMay 24, 2020

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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