Composition for sustained release injections and production method thereof
CA 2448814 A1 · Owner: Nakanishi, Kiyo · Inventors: Yamashita, Noboru; Saito, Katsumi; Maeda, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sustained-release compositions for injection wherein controlled release at the early stage and continuous release can be achieved by spray-drying a physiologically active protein while sustaining its physiological activity and enclosing it in a biodegradable polymer substance at a high efficiency; and physiologically active protein-containing sustained-release compositions for injection which substantially consist of the physiologically active protein and saccharides prepared by dissolving a spray-dried fine powder containing particles having a diameter of 10 µm or less at a ratio of 90% or above in a solution of a biodegradable polymer substance in an organic solvent and then …
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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 July 8, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2024.
- 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.