Surfactant free topical compositions and method for rapid preparation thereof
CA 2399229 A1 · Owner: Aust, Duncan T. · Inventors: Hayward, James A.; Crawford, Timothy K.; Aust, Duncan T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a composition for topical oral, nasal, anal, ophthalmic, or vaginal application comprising a base composition and at least one dispersion comprising suspended particles of a hydrophobic active agent a , hydrophobic adjuvant, or a combination thereof. The base composition comprises a rheology modifying agent and water. The composition is substantially free of emulsifying surfactants and the suspended particles generally have a diameter less than about 500 or 1,000 nm. Another embodiment is a method of preparing a composition comprising mixing the aforementioned base composition with the aforementioned dispersion. Mixing may be performed with a propeller …
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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 January 31, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 31, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2023.
- 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.