Patent Yard Sign in
Expired European patentEurope

Semiconductor memory device having a plurality of charge-storage type memory cells

EP 0100908 B1 · Applicant: KABUSHIKI KAISHA TOSHIBA

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 July 14, 1983 and granted May 2, 1990. A European patent lasts at most 20 years from filing, so its term ended July 14, 2003.
  • 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 January 14, 2009.
  • 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.
FiledJuly 14, 1983
PublishedFebruary 22, 1984
GrantedMay 2, 1990
Term endedJuly 14, 2003
Application numberEP 83106923
Classification (CPC)G11C11/4094

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedJuly 14, 1983PublishedFeb 22, 1984Patent grantedMay 2, 1990Term endedJuly 14, 2003

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.