Dynamic cut-off frequency varying filter
CA 2590716 C · Owner: Texaco Development Corporation · Inventors: Sun, Hongqiao; Mirkovic, Vesna R.; Wheat, W. Spencer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus are disclosed. The apparatus includes a store (103) of at least one historical sensor measurement a store of potential cut-off , frequencies (106) and a filter (109). Each potential cut-off frequency (106) is associated with a respective potential difference (112) between a sensor measurement (115) and the stored historical sensor measurement (118). The filter (109) has a cut-off frequency (121) dynamically selected from the stored potential cut-off frequencies (106) on the basis of a difference (112) between the stored historical sensor measurement (118) and a current sensor measurement (115). The method includes determining a difference between a current …
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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 December 9, 2005 and granted December 2, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.