Dosage forms having an inner core and outer shell
CA 2446760 A1 · Owner: Bunick, Frank J. · Inventors: Lee, Der-Yang; Bunick, Frank J.; Thomas, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In one embodiment, the dosage form of this invention comprises a core having an outer surface and a shell having outer and inner surfaces wherein the , shell surrounds the core such that the shell inner surface resides substantially conformally upon the core outer surface the shell thickness is , in the range of about 100-400 microns the relative standard deviation of the shell thickness on the dosage form is less than about 30 % the shell , comprises less than about 50 % crystallizable sugar and the dosage form is , substantially free of charge control agents. In another embodiment the dosage , form comprises a core having an outer surface and a shell having outer and inner surfaces, …
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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 28, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 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.