Solid dispersion compositions of tebufelone
CA 2135603 C · Owner: Kelm, Gary Robert · Inventors: Dobrozsi, Douglas Joseph; Kelm, Gary Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The subject invention relates to compositions in dosage form comprising a solid dispersion which is a solidified melt mixture consisting essentially of the following components: (a) from about 15 % to about 75 % of tebufelone; (b) from about 25 % to about 65 % of a poloxamer surfactant having a melting point of about 40 °C or greater the poloxamer surfactant consisting, essentially of a block copolymer having three polymer blocks a middle block of poly(oxypropylene) with a molecular weight of from about 1450 daltons to about 6000 daltons and end blocks of poly(oxyethylene), the end blocks being from about 50 % to about 90 % of the copolymer; and (c) from 0 % to about 60 % of other …
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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 April 30, 1993 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2015.
- 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.