Improved venous valve cutter for in-situ incision of venous valve leaflets
CA 2131702 C · Owner: Poloyko, Alexander · Inventors: Melinyshyn, Lev; Goldberg, Mark; Poloyko, Alexander
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved valve cutter (10) for in-situ incision of valve leaflets which safely efficiently, and consistently renders venous valves incompetent while minimizing frictional forces on the endothelium of the vessel and preventing inadvertent contact between cutting surfaces and the intima of the vein wall. The valve cutter (10) includes a plurality of proximally directed prongs (36) presenting sharp edges, where the prongs (36) are separated by slots (38) similarly presenting sharp edges to pierce the valve leaflets so that the cutting head (12) is provided with a continuous cutting surface in multiple planes running along the entire forward edge of the cutting head. Means are provided for …
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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 9, 1993 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 2015.
- 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.