Loop electrodes for electrocautery probes for use with a resectoscope
CA 2218519 C · Owner: Symbiosis Corporation · Inventors: Hahnen, Kevin F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrocautery probe (112) includes a distal loop electrode (122) mounted between a pair of arms (123, 125) which are joined at their proximal ends to an electrode lead (127), and a mounting sleeve (129) for slidable coupling the probe to the guide tube (14) of a resectoscope (10). The loop electrode is formed with a relatively broad lower surface defining a sharp distal edge (122a) and a sharp proximal edge (122b). The electrode may have a triangular cross section or a cross section which is defined by an upper convex surface and a lower flat surface. Tests have demonstrated that the electrode according to the invention is approximately 90 % more effective in coagulation than …
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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 April 19, 1996 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2018.
- 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.