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Expired Canadian patentCanada

Systems, methods, software, and interfaces for multilingual information retrieval

CA 2591897 C · Owner: Thomson Reuters Enterprise Centre Gmbh · Inventors: Moulinier, Isabelle; Lund, Elizabeth S.

CIPO record

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Abstract From the Canadian patent

The present inventors have a devised one or more novel methods systems, and , interfaces for facilitating multi-lingual searches. One exemplary method entails creating multiple language-specific indices for a collection of documents, with each index including stemmed and non-stemmed versions of terms from the documents. Users submit queries that are associated with a set of one or more target languages. Query processing entails translating original and stemmed versions of each term in a query into each of the target languages using one or more techniques that each yield a set of potentially equivalent query terms. Each set of potentially equivalent query terms is then processed …

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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 January 4, 2006 and granted March 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2026.
  • 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.
FiledJanuary 4, 2006
GrantedMarch 19, 2013
Term endedJanuary 4, 2026
Patent numberCA 2591897 C
Classification (IPC)—

Timeline

Timeline From CIPO dates

2007200920112013201520172019202120232025Application filedJan 4, 2006Patent grantedMarch 19, 2013Term endedJan 4, 2026

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