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Expired European patentEurope

Storage masking circuit and method for a multiprocessor system

EP 0185137 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 August 20, 1985 and granted June 21, 1995. A European patent lasts at most 20 years from filing, so its term ended August 20, 2005.
  • 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 February 20, 2011.
  • 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.
FiledAugust 20, 1985
PublishedJune 25, 1986
GrantedJune 21, 1995
Term endedAugust 20, 2005
Application numberEP 85110386
Classification (CPC)G06F12/0806

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedAug 20, 1985PublishedJune 25, 1986Patent grantedJune 21, 1995Term endedAug 20, 2005

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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