Modified release dosage forms
CA 2446759 A1 · Owner: Lee, Der-Yang · Inventors: Li, Shun-Por; Mcteigue, Daniel; Thomas, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dosage form comprises: (a) at least one active ingredient; (b) a core; and(c) a shell which surrounds the core wherein the shell is substantially , free of pores having a diameter of 0.5-5.0 microns and the shell comprises a , first shell portion and a second shell portion which are compositionally different and the dosage form provides a modified release profile of the active ingredient upon contacting of the dosage form with a liquid medium. In another embodiment, the dosage form comprises: (a) at least one active ingredient; (b) a core comprising first and second core portions; and (c) a shell which surrounds the core, wherein the shell comprises first and second shell portions …
Read the whole patent
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.