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Expired European patentEurope

Accelerated finite field operations on an elliptic curve

EP 0874307 B1 · Applicant: Certicom Corp.

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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 March 25, 1998 and granted January 14, 2009. A European patent lasts at most 20 years from filing, so its term ended March 25, 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 September 25, 2023.
  • 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.
FiledMarch 25, 1998
PublishedOctober 28, 1998
GrantedJanuary 14, 2009
Term endedMarch 25, 2018
Application numberEP 98302286
Classification (CPC)H04L9/3247 +2 more

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedMarch 25, 1998PublishedOct 28, 1998Patent grantedJan 14, 2009Term endedMarch 25, 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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