Dosage forms having an inner core and outer shell with different shapes
CA 2447984 A1 · Owner: Sowden, Harry S. · Inventors: Bunick, Frank J.; Mcnally, Gerard P.; Sowden, Harry S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dosage form comprises an active ingredient a core having an outer surface , and a first shape and a shell having outer and inner surfaces and a second shape, in which the shell surrounds at least a portion of the core and the , first and second shapes are substantially different. In one embodiment the shell comprises at least about 80% of a flowable material selected from the group consisting of film formers, gelling polymers thermoplastic materials, low melting hydrophobic materials non-crystallizable sugars, non-, crystallizable sugar-alcohols and mixtures thereof. In another embodiment the shell is substantially free of pores having a diameter of 0.5 to 5.0 microns. In another …
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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.