Method and system for conducting reverse index scans
CA 2279092 C · Owner: Mcarthur, Catherine S. · Inventors: Cranston, Leslie A.; Mcarthur, Catherine S.; Huras, Matthew A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method executed by a data processor for scanning a reverse range. The scan is conducted, in an index for a table having an upper end and a lower end. The reverse range has a start key value, for defining the reverse range and the index has a set of keys representing a set of records and record, attributes in the table. Each key in the set of keys has a RID designating a record in the table and, a key value corresponding to an attribute of the record in the table. The method includes the steps, of searching the index for a start key selecting an upper bound of the , reverse range and, if the upper, bound is the first key in the index indicating that the index does not , contain any …
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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 July 29, 1999 and granted September 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.