Delivery of physiological agents with in-situ gels comprising anionic polysaccharides
CA 2537290 C · Owner: Ni, Yawei · Inventors: Ni, Yawei; Yates, Kenneth M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In-situ gelling compositions for delivering pharmacologically active substances to the tissues, body fluids and mucosal surfaces of animal , patients in the form of liquids solids and powders, comprising anionic polysaccharides and especially low methoxyl pectins as gelling agents methods , of preparation, and method of use of the in-situ gelling compositions for the delivery and sustained release of a physiologically active agent and , especially vaccine antigens, to the tissues and mucosal surfaces of an animal.
Read the whole patent
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 May 24, 2004 and granted July 9, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2026.
- 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.