Oral drug delivery system
CA 2810477 C · Owner: Durect Corporation · Inventors: Yum, Su Il; Gibson, John W.; Schoenhard, Grant
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Drug formulations, dosage forms and drug delivery devices suitable for administration of pharmaceutical compounds and compositions including oral administration are provided. Embodiments of this invention provide an oral formulation comprising: a drug component; sucrose acetate isobutyrate (SAIB); and a cellulose acetate butyrate (CAB) having a butyryl content ranging from about 17% to about 38% an acetyl content ranging from about 13% to about 30% a hydroxyl content ranging from about 0.8% to about 1.7% or a combination thereof.
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 December 15, 2003 and granted September 17, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2025.
- 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.