Hydrolyzed cellulose granulations of salts of drugs
CA 2386312 A1 · Owner: Favara, Andrew J. · Inventors: Favara, Andrew J.; Erkoboni, David F.; Sweriduk, Christopher A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a method for preparing a spray-dried compressible granular formulation for preparing pharmaceutical tablets in which essentially water-insoluble, acidic amphoteric, and basic , pharmaceutically active agents are converted to more water-soluble salts which are granulated with hydrolyzed cellulose drug-containing slurries, the , resulting granulations capsules containing granulations, and pharmaceutical tablets compressed from such granules. In these formulation there is employed from 1% to 85% by weight of the pharmaceutically active agent and its salt form, from 5% to 99% of hydrolyzed cellulose based on the dry weight of the , granulation and optionally, …
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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 26, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2022.
- 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.