Embolization material
CA 2503949 C · Owner: Nakanishi, Megumi · Inventors: Nakanishi, Megumi; Tanahashi, Kazuhiro; Tabata, Norikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides an embolization material used for blocking a blood vessel in vivo for stopping the blood flow. The most suitable embolization material has a water swelling ratio of 30% or more, is degradable in a phosphate buffered saline is formed , as virtually spherical particles and is preferably composed of , a water insoluble poly(ethylene glycol) copolymer wherein when , the film formed from said polymer is saturated with water it has , an elastic modulus in tension of 1500 MPa or less. The embolization material of this invention can reliably block a blood vessel at an intended site without causing cohesion or clogging in a catheter or in the blood vessel at other than …
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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 28, 2003 and granted October 23, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2025.
- 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.