Use of a colloidal suspension of a cationic polymer to treat a support for medical use
CA 2655624 C · Owner: Thomas, Michel · Inventors: Thomas, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a composite support comprising a base support for the treatment of a biological fluid in which: " the base support is essentially- constituted by a first polymer carrying anionic or anionizable groups; " at least a part of the surface of the base support is coated with a second polymer ionically bonded to the first polymer the second polymer carrying the cationic or cationizable groups which are capable of forming an ionic bond with the anionic or anionizable groups of the first polymer; in which the second polymer is in the colloidal form and in mixture with a polyacid during application to the support allowing the composite membrane to adsorb at least one entity …
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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 September 6, 2006 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 6, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.