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Expired European patentEurope

Depleted semi-conductor element with a potential minimum for majority carriers

EP 0179102 B1 · Applicant: Lutz, Gerhard, Dr.

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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 25, 1985 and granted July 1, 1992. A European patent lasts at most 20 years from filing, so its term ended April 25, 2005.
  • 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 25, 2010.
  • 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 25, 1985
PublishedApril 30, 1986
GrantedJuly 1, 1992
Term endedApril 25, 2005
Application numberEP 85901982
Classification (CPC)H10F39/15 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedApril 25, 1985PublishedApril 30, 1986Patent grantedJuly 1, 1992Term endedApril 25, 2005

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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