Starch encapsulation of biologically active agents by a continuous process
CA 2085875 C · Owner: Bagley, Edward B. · Inventors: Doane, William M.; Wing, Robert E.; Bagley, Edward B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Biologically active agents to be encapsulated are continuously blended with a starchy material and water subjected to, high-shear mechanical action at a temperature above the gelatinization temperature of starch and continuously recovered as an, insolubilized matrix of starch that entraps discontinuous domains of the agent. Alternatively the core material to be encapsulated, is added and blended with the aqueous dispersion of starch after the starch and water have been subjected to an elevated temperature sufficient to gelatinize the starch. Rate of release of agents to the environment can be controlled by preselecting a set of conditons related to various processing parameters. …
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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 June 19, 1991 and granted May 25, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2013.
- 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.