Annular ultrasonic transducers in a catheter
CA 2093645 C · Owner: Catheter Technology Co. · Inventors: Vilkomerson, David; De Bernardis, Francis A. Jr.; Gardineer, Bayard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ultrasonic transducer (11) for use in locating devices with an ultrasonic imaging system which is sensitive over a broad range or angles or incident acoustic beams such as those beams (14) emitted in ultrasonic systems has a curved surface (21), and, is an annular member in shape. The elongated catheter (20) or other device passes through the opening (22) of the annular transducer (11). Based on the shape of such transducers and the wavelength used. the response of the transducers is a function of the angle of the insonifying beam to the catheter axis (r). The particular response of such transducers is shown to depend on the curvature of the annular marker, with the radius of curvature …
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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 October 8, 1991 and granted April 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2013.
- 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.