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European application, no grantEurope

Semiconductor device, heterojunction bipolar transistor, and high electron mobility transistor

EP 0624907 A2 · Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA

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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 April 29, 1994 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 29, 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 October 29, 2019.
  • 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.
FiledApril 29, 1994
PublishedNovember 17, 1994
GrantedNever granted
Term endedApril 29, 2014
Application numberEP 94106749
Classification (CPC)H10D62/8164 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedApril 29, 1994PublishedNov 17, 1994Term endedApril 29, 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.