Oral dosage from comprising a liquid active agent formulation and controlling release thereof by an expandable osmotic composition
CA 2490412 A1 · Owner: Yum, Si-Hong · Inventors: Yum, Si-Hong; Shafi, Keru; Dong, Liang-Chang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a controlled release oral dosage form for the delivery of a liquid active agent formulation. The dosage form of the present invention includes a reservoir formed of a water impermeable material and filled with a liquid active agent formulation. The dosage form of the present invention also includes an expandable osmotic composition positioned within the reservoir, and optionally, the expandable osmotic composition is separated from contact with the liquid active agent formulation by a barrier layer that is substantially impermeable to the passage of liquid. To facilitate expulsion of the liquid active agent formulation the dosage form of the present , …
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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 June 27, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 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
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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.