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Expired European patentEurope

A scalar interrupt-acknowledgement system

EP 0714535 B1 · Applicant: NATIONAL SEMICONDUCTOR CORPORATION

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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 24, 1994 and granted January 20, 1999. A European patent lasts at most 20 years from filing, so its term ended June 24, 2014.
  • 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 24, 2019.
  • 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 24, 1994
PublishedJune 5, 1996
GrantedJanuary 20, 1999
Term endedJune 24, 2014
Application numberEP 94922449
Classification (CPC)G06F13/24

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 24, 1994PublishedJune 5, 1996Patent grantedJan 20, 1999Term endedJune 24, 2014

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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