Ferromagnetic sensing method and apparatus
CA 2427503 A1 · Owner: Mcclure, Richard J. · Inventors: Avrin, William F.; Mcclure, Richard J.; Massengill, R. Kemp
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 sequentially exposing a region of a patient to a low, level DC magnetic field, first without movement of the region to the sensing, apparatus, then with movement of the region to detect synchronous changes in the, detected signal, indicative of a ferromagnetic foreign body in the region. The ing and, signal detection can take place at a plurality of test zone set points at increasing, magnitudes of the applied magnetic field. The sensing apparatus can be ed at each, test zone set point prior to introduction of the patient.
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 May 1, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 1, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 1, 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
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.