Suspension aerosol formulations
CA 2320129 C · Owner: Schultz, Robert K. · Inventors: Oliver, Martin J.; Moris, Robert A.; Jinks, Philip A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metered dose aerosol canister, equipped with a metering valve, containing a medicinal aerosol formulation suitable fox inhalation comprising a therapeutically effective amount of a drug in suspension and a proellant selected from the group consisting of HFC 134a HFC 227 and, mixtures thereof, the formulation being further characterized in that it is free of surfactant includes 5, to 15 percent ethanol, and said drug is albuterol sulfate.
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 11, 1992 and granted February 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2014.
- 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.