Powdered medicament dispensing device
CA 2091366 C · Owner: Norton Healthcare Limited · Inventors: Bacon, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A powder inhalation device comprising a powder reservoir (42) capable of containing a powdered medicament (44) and a volume of air (46), a metering chamber (48) extending from the powder reservoir to allow removal of the powdered medicament from the reservoir in discrete amounts and a means for compressing the air in the reservoir wherein a passage is provided to allow air to vent from the powder reservoir, through the metering chamber and into atmosphere as the pressure of the air in the powder reservoir is increased.
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 November 29, 1991 and granted June 3, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2013.
- 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.