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Expired European patentEurope

Circuit arrangement comprising a memory and an access control unit

EP 0127809 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 May 14, 1984 and granted August 17, 1988. A European patent lasts at most 20 years from filing, so its term ended May 14, 2004.
  • 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 November 14, 2009.
  • 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.
FiledMay 14, 1984
PublishedDecember 12, 1984
GrantedAugust 17, 1988
Term endedMay 14, 2004
Application numberEP 84105460
Classification (CPC)G06Q20/357 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedMay 14, 1984PublishedDec 12, 1984Patent grantedAug 17, 1988Term endedMay 14, 2004

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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