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Expired European patentEurope

Ensuring data integrity in multiprocessor or pipelined processor system

EP 0465321 B1 · Applicant: DIGITAL EQUIPMENT 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 June 27, 1991 and granted August 13, 1997. A European patent lasts at most 20 years from filing, so its term ended June 27, 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 December 27, 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.
FiledJune 27, 1991
PublishedJanuary 8, 1992
GrantedAugust 13, 1997
Term endedJune 27, 2011
Application numberEP 91401769
Classification (CPC)G06F9/3004 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJune 27, 1991PublishedJan 8, 1992Patent grantedAug 13, 1997Term endedJune 27, 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

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