Patent Yard Sign in
European application, no grantEurope

Semiconductor ballistic transistor

EP 0366861 A1 · Applicant: International Business Machines Corporation

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed June 10, 1989 and never granted as a European patent. Had it been granted, its 20-year term would have ended June 10, 2009.
  • 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 December 10, 2014.
  • 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.
FiledJune 10, 1989
PublishedMay 9, 1990
GrantedNever granted
Term endedJune 10, 2009
Application numberEP 89110544
Classification (CPC)H10D30/40 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedJune 10, 1989PublishedMay 9, 1990Term endedJune 10, 2009

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.