Compact member comprising a plurality of porous cellulose matrices, (pcms), method of manufacturing and use thereof
CA 2271652 A1 · Owner: Pharmacia Aktiebolag · Inventors: Nystrom, Christer; Gren, Torkel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a compact member comprising a plurality of porous cellulose matrices (PCMs), and providing extended release of an active compound located in the pores of said PCMs together with a release-modifying agent. The friability of the compact member is less than 2.1% and the , disintegration time in vitro of said compact member is less than 240 minutes. The compact member is manufactured by exposing a plurality of PCMs to an active compound and a release-modifying agent in optional sequence or , mixture, for a time sufficient for said active compound and release-modifying agent to fill the pores in said PCMs to a preselected level. The PCMs are subsequently compacted …
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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 November 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2019.
- 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
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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.