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Expired European patentEurope

Control arrangement for magnetic bubble memories

EP 0075666 B1 · Applicant: International Business Machines Corporation

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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 July 13, 1982 and granted May 18, 1988. A European patent lasts at most 20 years from filing, so its term ended July 13, 2002.
  • 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 13, 2008.
  • 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 13, 1982
PublishedApril 6, 1983
GrantedMay 18, 1988
Term endedJuly 13, 2002
Application numberEP 82106256
Classification (CPC)G06F3/007 +1 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedJuly 13, 1982PublishedApril 6, 1983Patent grantedMay 18, 1988Term endedJuly 13, 2002

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.