Improvements to aerosol devices
CA 2001817 C · Owner: Clarke, Michael John · Inventors: Clarke, Michael John; Corbett, John Stuart; Blower, Andrew William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aerosol inhalation device suitable for use in association with a pressurised medicament container having a valve stem has a spray head adapted to receive the salve stem. The spray head has an outlet orifice which is provided with a spout. The device is especially useful in the administration of hygroscopic medicaments for example, sodium cromoglycate or nedocromil sodium.
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 20, 1989 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2011.
- 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.