Remotely interrogated diagnostic implant device with electrically passive sensor
CA 2364869 A1 · Owner: Christy, Daniel P. · Inventors: Spillman, William B. Jr.; Christy, Daniel P.; Weissman, Eric M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An implant device (32) is provided which is responsive to an external interrogation circuit (38). The implant device (32) includes a structure implantable within a living animal (34) and operatively configured to carry out or assist in carrying out a function within the living animal. The device (32) further includes an electrically passive sensing circuit (not shown) integral with the structure for sensing a parameter associated with the function. In particular, the sensing circuit includes (not shown) an inductive element, wherein the sensing circuit has a frequency dependent variable impedance loading effect on the interrogation circuit (38) in response to an interrogation …
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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 March 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2022.
- 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.