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European application, no grantEurope

Method and means for managing space re-use in a shadow written B-tree via free space lists

EP 0453707 A2 · Applicant: International Business Machines Corporation

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Overview

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

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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 January 18, 1991 and never granted as a European patent. Had it been granted, its 20-year term would have ended January 18, 2011.
  • 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 July 18, 2016.
  • 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.
FiledJanuary 18, 1991
PublishedOctober 30, 1991
GrantedNever granted
Term endedJanuary 18, 2011
Application numberEP 91100537
Classification (CPC)G06F16/9027

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJan 18, 1991PublishedOct 30, 1991Term endedJan 18, 2011

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.