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Expired European patentEurope

Cache memory and its operating method

EP 0075715 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 17, 1982 and granted March 15, 1989. A European patent lasts at most 20 years from filing, so its term ended August 17, 2002.
  • 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 17, 2008.
  • 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 17, 1982
PublishedApril 6, 1983
GrantedMarch 15, 1989
Term endedAugust 17, 2002
Application numberEP 82107496
Classification (CPC)G06F12/0864

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedAug 17, 1982PublishedApril 6, 1983Patent grantedMarch 15, 1989Term endedAug 17, 2002

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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