Biliquid foams, stable dispersions thereof and a corresponding process of manufacturing
CA 2533740 C · Owner: Drug Delivery Solutions Limited · Inventors: Wheeler, Derek; Dias, Monica; Guffogg, Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A biliquid foam comprising from 10% to 98% by weight of a non-polar liquid other than a fuel and from 2 to 88% by weight of a continuous phase polar liquid comprising a C1-C4 alcohol, a liquid polyethylene glycol ethylene , glycol or propylene glycol, or mixtures thereof in an amount of at least 65% , by weight relative to the weight of the continuous phase wherein the , biliquid foam is stabilized with an amount of from 0.05% to 2% by weight based on the total formulation of a surfactant which is selected from castor oil/poly(alkylene glycol) adducts containing from 20 to 50 alkoxy groups a C8-, C24 fatty acid or hydrogenated castor oil/poly(alkylene glycol) adducts containing from 20 …
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 July 30, 2004 and granted January 28, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2026.
- 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.