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Expired European patentEurope

Cryptographic system and method with fast decryption

EP 1031204 B1 · Applicant: MICROSOFT 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 September 16, 1998 and granted January 25, 2006. A European patent lasts at most 20 years from filing, so its term ended September 16, 2018.
  • 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 March 16, 2024.
  • 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.
FiledSeptember 16, 1998
PublishedAugust 30, 2000
GrantedJanuary 25, 2006
Term endedSeptember 16, 2018
Application numberEP 98967018
Classification (CPC)H04L9/3239 +1 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedSep 16, 1998PublishedAug 30, 2000Patent grantedJan 25, 2006Term endedSep 16, 2018

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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