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Expired Canadian patentCanada

System for analyzing the syntactical structure of a sentence

CA 2001439 C · Owner: Tucker, Ruth Linden · Inventors: Tucker, Ruth Linden

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Readers and composers of English language sentences can analyze and synthesize, respectively, such sentences using the system of this invention including a method of syntactically categorizing the constituents of such sentences and a schema. The schema depicts all possible categories to which the constituents of any sentence could belong it, depicts the general order of appearance of the basic elements (foundation elements) in a sentence, and it depicts alignment of the constituents according to the functions they perform in a sentence, the alignment being informative to a schema user of certain relationships between constituents of a common function. In one embodiment of the schema all …

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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 October 25, 1989 and granted June 30, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2009.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 25, 1989
GrantedJune 30, 1998
Term endedOctober 25, 2009
Patent numberCA 2001439 C
Classification (IPC)G09B19/00 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedOct 25, 1989Patent grantedJune 30, 1998Term endedOct 25, 2009

Sources & verification

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