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Expired European patentEurope

Method for performing a "rotate through carry" operation

EP 0772809 B1 · Applicant: NATIONAL SEMICONDUCTOR 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 May 16, 1996 and granted August 27, 2003. A European patent lasts at most 20 years from filing, so its term ended May 16, 2016.
  • 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 16, 2021.
  • 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 16, 1996
PublishedMay 14, 1997
GrantedAugust 27, 2003
Term endedMay 16, 2016
Application numberEP 96920254
Classification (CPC)G06F5/01 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedMay 16, 1996PublishedMay 14, 1997Patent grantedAug 27, 2003Term endedMay 16, 2016

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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