Subsaturated transdermal delivery device
CA 1338700 C · Owner: Yum, Su Il · Inventors: Osborne, James Lee; Yum, Su Il; Gale, Robert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Subsaturated, rate controlled delivery devices (I) for delivering an agent (5). The initial equilibrated concentration of the agent in the agent reservoir (3) and the adhesive (5) is below saturation. The initial loading of the agent in reservoir (3) is sufficient to prevent the activity of the agent in the reservoir (3) from decreasing by more than about 75% and preferably no more than about 25% during the predetermined period of administration. The thicknesses of the adhesive (5), rate controlling membrane (4) and reservoir (3) layers are selected so that at least 50% and preferably at least 75% of the initial equilibrated agent loading is in the reservoir layer (3). The devices (1) are …
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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
- Granted November 12, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2013.
- 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.