Method and apparatus for detecting change in intrathoracic electrical impedance
CA 2508403 A1 · Owner: Medtronic, Inc. · Inventors: Stadler, Robert W.; Wang, Li
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for detection of changes in impedance a patient that includes generating measured impedances generating an adaptive baseline trend of the measured impedances corresponding to a first time period generating a , short term trend of the measured impedances corresponding to a second time period less than the first time period and generating a metric of impedance , change between the adaptive baseline trend and one of a most recent measured impedance and the short term trend of the measured impedances.
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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 4, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2025.
- 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
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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.