Monopolar polypectomy snare with coagulation electrode
CA 2085402 A1 · Owner: Everest Medical Corporation · Inventors: Stock, John F.; Rydell, Mark A.; Zenk, John L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A monopolar electrosurgical instrument for excising polyps from the gastrointestinal tract comprises an elongated flexible plastic tube having a first monopolar electrode mounted a small predetermined distance from the distal end of the tubular member and a conductive wire loop affixed to a pull-wire the pull-wire, extending through the lumen of the tubular member and being connected at its proximal end to a plunger-type handle whereby the loop can be opened and closed by extending and retracting the loop relative to the distal end of the tubular member. By incorporating both the surface electrode and the loop on the same instrument polyps may be severed electrosurgically using the snare …
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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 15, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2014.
- 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.