Ablation device with spiral array ultrasound transducer
CA 2533537 C · Owner: Keidar, Yaron · Inventors: Keidar, Yaron
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a device assembly and tissue ablation transducer (400) having a plurality of helical elements that can be operated out of phase to orient the acoustical energy beam forward or backward in the longitudinal direction. The transducers includes a cylindrical inner electrode (402), a cylindrical piezoelectric (403) material disposed over the inner electrode, and a cylindrical outer electrode (404) disposed over the cylindrical piezoelectric material. Spiral grooves (figure 4a) are cut through at least the outer electrode separating the transducer into a plurality of functionally discrete helical transducer segments. The helical transducer segments can be …
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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 July 20, 2004 and granted April 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2026.
- 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.