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Expired European patentEurope

Method and apparatus for transferring information by utilizing electron beam

EP 0256641 B1 · Applicant: CANON 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 June 23, 1987 and granted December 1, 1993. A European patent lasts at most 20 years from filing, so its term ended June 23, 2007.
  • 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 23, 2012.
  • 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 23, 1987
PublishedFebruary 24, 1988
GrantedDecember 1, 1993
Term endedJune 23, 2007
Application numberEP 87305598
Classification (CPC)G11C7/005 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedJune 23, 1987PublishedFeb 24, 1988Patent grantedDec 1, 1993Term endedJune 23, 2007

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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