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Expired European patentEurope

Apparatus for implementing a symmetric block ciphering algorithm without the complementation property

EP 0660563 B1 · Applicant: GENERAL INSTRUMENT 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 November 16, 1994 and granted February 28, 2001. A European patent lasts at most 20 years from filing, so its term ended November 16, 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 May 16, 2020.
  • 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.
FiledNovember 16, 1994
PublishedJune 28, 1995
GrantedFebruary 28, 2001
Term endedNovember 16, 2014
Application numberEP 94118066
Classification (CPC)H04L9/0625

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedNov 16, 1994PublishedJune 28, 1995Patent grantedFeb 28, 2001Term endedNov 16, 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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