Hfc solution formulations containing an anticholinergic
CA 2531847 C · Owner: Schmidt, Friedrich · Inventors: Schmidt, Friedrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to stable pharmaceutical solution formulations suitable for aerosol administration containing an anticholinergic of formula (I) wherein X- is a pharmaceutically acceptable anion. More particularly this , invention relates to stable pharmaceutical solution formulations suitable for aerosol administration containing an anticholinergic of formula (I) in an environmentally safe hydrofluorocarbon (HFC) as a propellant together with an , organic compound as a cosolvent wherein either an inorganic acid or an organic acid is added to the aerosol solution formulation.
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 6, 2004 and granted May 8, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 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.