Stretch resistant vaso-occlusive coils
CA 2198765 C · Owner: Stryker Corporation · Inventors: Gia, Son M.; Engelson, Erik T.; Ken, Christopher G.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This is an implantable vaso-occlusive device. It is typically a vaso-occlusive coil comprising a primary helically wound coil which may then be wound into a secondary shape. Central to the invention is the use of a stretch-resisting member extending through the lumen formed which stretch -resisting, member is fixedly attached directly or indirectly, to the coil in at least two locations. The stretch resisting member is preferably somewhat loose within the interior of the lumen so to prevent the coil from collapsing binding, and therefore, stiffening during passage of turns through the human body. The coil should bend easily. In some variations of the invention the stretch-resisting member …
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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 February 27, 1997 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2019.
- 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.