Inhalation device without propellant gas
CA 2090224 C · Owner: Boehringer Ingelheim Kg · Inventors: Poss, Gerhard; Wittekind, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a propellent-free inhalation device having a supply of medicinal substance to be inhaled, a manually operable metering device for removing a given dose of the medicinal substance for the inhalation process and having a mouthpiece for actively breathing in and an air space for distributing the particular dose of medicinal substance in the air stream. In inhalers of this kind it is important that the dose of medicinal substance to be inhaled should be highly reproducible. In order to solve this problem the invention proposes a holder in which the supply of medicinal substance is not in powder form as in the, known embodiments, but is contained in solidified form in a …
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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 August 13, 1991 and granted October 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 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.