Bipolar electrosurgical scissors and method of manufacture
CA 2191823 C · Owner: Valleylab, Inc. · Inventors: Heard, David Nichols
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bipolar electrosurgical scissors has an improved coagulation capability. Both poles of electrosurgical energy are exposed on the exterior surfaces 17 of each shearing member so that the scissors can be used to coagulate tissue using only one shearing member. There may be two or more electrically conductive regions 22 on the exterior surface of each shearing member. The conductive regions 22 may be formed by laminating depositing or inlaying electrically conductive material on the exterior surfaces 17. The conductive regions 22 are electrically insulated from each other. In one embodiment the shearing surfaces 15 are also electrically conductive and are each connected to the same …
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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 2, 1996 and granted May 4, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 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.