Medicinal aerosol formulations
CA 2425035 A1 · Owner: 3M Innovative Properties Company · Inventors: Lister, James T.; Mckenzie, Lesley; Jinks, Philip A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Use of particulate bulking agents having an extremely small mass median diameter of less than one micron, preferably less than 300 nm in , pharmaceutical aerosol formulations comprising a suspension of drug particles in a propellant. Examples of bulking agents include ascorbic acid saccharides, polysaccharides, amino acids organic and inorganic salts, urea, and propyliodone.
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 October 1, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 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.