Inhaler
CA 2562386 C · Owner: Peng, Weidong · Inventors: Townsend, Christopher Andrew; Peng, Weidong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dry powder inhaler comprises an airway (1) along which in use, air is drawn , from an upstream inlet end (2) to a downstream, outlet end (3). The airway (1) includes a medicament presentation region (4) at which in use, a dose of , medicament is presented to the airway (1) a primary air inlet (10), and a , barrel (5) extending from the medicament presentation region (4) to the outlet end (3) of the airway (1). The inlet end of the barrel (5) is of reduced internal dimension relative to the medicament presentation region (4) and relative to the outlet end of the barrel (5) such that the inlet end of the , barrel (5) constitutes a constriction of the airway (1). At least one secondary …
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 April 21, 2005 and granted November 18, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.