Automatically relaxable query for information retrieval
CA 2120447 C · Owner: Lizee, Martin · Inventors: Lizee, Robert; Lizee, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A data processing system is disclosed for automatically querying databases. The system uses an Automatically Relaxable Query (ARQ) consisting of a list of query conditions ordered in descending degree of importance. When an ARQ is processed the, database is queried on the first condition of the ARQ; if any object is found, the first condition is labelled. Then the, system proceeds with a query composed of all the conditions labelled previously in conjunction with the next condition of the ARQ; if any object is found then this next condition is labelled. The last step is repeated until all the remaining conditions of the ARQ have been used. The system then reports which conditions were …
Read the whole patent
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 March 31, 1994 and granted August 25, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.