Sustained release pharmaceutical preparation and process for preparing the same
CA 2064150 A1 · Owner: Tanabe Seiyaku Co. Ltd. · Inventors: Maejima, Toru; Osawa, Takashi; Kobayashi, Masao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sustained release pharmaceutical preparation comprising a carrier, an effective ingredient layer containing a medicinal compound and a heat-meltable material as a binder which is formed around said carrier and a coating layer containing a non-heat-meltable dissolution-controlling agent and a heat-meltable material as a binder which is formed around said effective ingredient layer and the process for preparing the same. According to the present invention the formation of the, effective ingredient layer and the formation of the coating layer can be successively carried out in the same apparatus without using any solvents or drying step in short hours to give a sustained release …
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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 March 26, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2014.
- 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.