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Expired European patentEurope

Light-emitting semiconductor device having a super lattice

EP 0188080 B1 · Applicant: SHARP 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 November 28, 1985 and granted August 16, 1990. A European patent lasts at most 20 years from filing, so its term ended November 28, 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 May 28, 2011.
  • 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.
FiledNovember 28, 1985
PublishedJuly 23, 1986
GrantedAugust 16, 1990
Term endedNovember 28, 2005
Application numberEP 85308679
Classification (CPC)H10H20/824 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedNov 28, 1985PublishedJuly 23, 1986Patent grantedAug 16, 1990Term endedNov 28, 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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