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Expired European patentEurope

An arithmetic processing unit for executing a floating point operation

EP 0164451 B1 · Applicant: NEC 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 December 27, 1984 and granted May 20, 1992. A European patent lasts at most 20 years from filing, so its term ended December 27, 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 June 27, 2010.
  • 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.
FiledDecember 27, 1984
PublishedDecember 18, 1985
GrantedMay 20, 1992
Term endedDecember 27, 2004
Application numberEP 84116332
Classification (CPC)G06F7/485

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedDec 27, 1984PublishedDec 18, 1985Patent grantedMay 20, 1992Term endedDec 27, 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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