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Expired European patentEurope

System for controlling a machine tool by a tool controller under supervision of a central data processor

EP 0052707 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 September 16, 1981 and granted May 24, 1989. A European patent lasts at most 20 years from filing, so its term ended September 16, 2001.
  • 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 March 16, 2007.
  • 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.
FiledSeptember 16, 1981
PublishedJune 2, 1982
GrantedMay 24, 1989
Term endedSeptember 16, 2001
Application numberEP 81107296
Classification (CPC)G06F11/261 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedSep 16, 1981PublishedJune 2, 1982Patent grantedMay 24, 1989Term endedSep 16, 2001

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.