Self-limiting electrosurgical return electrode
CA 2393878 A1 · Owner: Megadyne Medical Products, Inc. · Inventors: Kieda, David B.; Isaacson, James D.; Fleenor, Richard P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-limiting electrosurgical return electrode (41) for use with electrosurgery. Through the selection of impedance characteristics for the electrode materials of the principal body of the electrode and through , tailoring of electrode geometries the return electrode of the present , invention is self-regulating and self-limiting as to current density and temperature rise so as to prevent patient trauma. The electrosurgical return electrode includes a sheet of material having an effective bulk impedance equal to or greater than about 4,000 cm and one or more connectors for making electrical connection to the sheet. The effective bulk impedance of the sheet may arise from resistive …
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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 6, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 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.