Improved electrosurgical instrument
CA 2433413 A1 · Owner: Heim, Warren Paul · Inventors: Brassell, James L.; Olichney, Michael; Heim, Warren Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved electrosurgical instrument (10) and method is disclosed for reducing smoke generation at a surgical site. The electrosurgical instrument comprises a metal body (20) having an outer insulating layer (30) to reduce thermal/electrical discharge from non-functional portions of the instrument. In one aspect of the invention, an insulating layer having a thermal conductance of about 1.2 W/cm K and a dielectric withstand strength of at least about 50 volts is employed. Such insulating layer may advantageously comprise silicon and/or carbon. In another aspect of the invention the metal , body is provided to have a thermal conductivity of at least about .35 W/cm K and may …
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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 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2023.
- 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.