Sustained release pharmaceutical preparation comprising multilayer granules
CA 1292913 C · Owner: Ando, Hidenobu · Inventors: Watanabe, Sumio; Yamakawa, Ichiro; Miyake, Yasuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multilayer granule is disclosed which comprises a core, a slow-release layer, a rapid-release layer provided outside the slow-release layer and a film layer containing a metal stearate and disposed between the slow-release layer and the rapid-release layer. A pharmacologically effective component can thereby be released over a prolonged period of time.
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
- Granted December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
- 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.