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Expired European patentEurope

Semiconductor wafer and production method therefor

EP 1197992 B1 · Applicant: MATSUSHITA ELECTRIC INDUSTRIAL 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 March 27, 2001 and granted August 20, 2008. A European patent lasts at most 20 years from filing, so its term ended March 27, 2021.
  • 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 September 27, 2026.
  • 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.
FiledMarch 27, 2001
PublishedApril 17, 2002
GrantedAugust 20, 2008
Term endedMarch 27, 2021
Application numberEP 01915871
Classification (CPC)H10P14/2905 +2 more

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedMarch 27, 2001PublishedApril 17, 2002Patent grantedAug 20, 2008Term endedMarch 27, 2021

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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