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Expired Canadian patentCanada

Principles and methods for personalizing newsfeeds via an analysis of information novelty and dynamics

CA 2498376 C · Owner: Dumais, Susan T. · Inventors: Dumais, Susan T.; Horvitz, Eric J.; Gabrilovich, Evgeniy

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Abstract From the Canadian patent

A system and methodology is provided for filtering temporal streams of information such as news stories by statistical measures of information novelty. Various techniques can be applied to custom tailor news feeds or other types of information based on information that a user has already reviewed. Methods for analyzing information novelty are provided along with a system that personalizes and filters information for users by identifying the novelty of stories in the context of stories they have already reviewed. The system employs novelty-analysis algorithms that represent articles as a bag of words and named entities. The algorithms analyze inter- and infra- document dynamics by …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed February 24, 2005 and granted October 22, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 24, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 24, 2005
GrantedOctober 22, 2013
Term endedFebruary 24, 2025
Patent numberCA 2498376 C
Classification (IPC)G06F17/30

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2006200820102012201420162018202020222024Application filedFeb 24, 2005Patent grantedOct 22, 2013Term endedFeb 24, 2025

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.