CA Patent

CA2147260C — Dry powder inhaler

Assigned to Dura Pharmaceuticals Inc · Expires 1999-04-13 · 27y expired

What this patent protects

A dry powder medecine inhaler has an impeller (31) non-concentrically disposed in a mixing chamber (25). A motor spins the impeller at high speed. A plunger (106) introduces a dose of powdered medecine into the chamber so that all powder particles are available for intermixing di…

USPTO Abstract

A dry powder medecine inhaler has an impeller (31) non-concentrically disposed in a mixing chamber (25). A motor spins the impeller at high speed. A plunger (106) introduces a dose of powdered medecine into the chamber so that all powder particles are available for intermixing disaggregation and comminution. An aperture (51) receives a first stream of air and passes it towards the mouthpiece for inhalation by the user. A wall (11) has at least one aperture (59) for diverting a portion of a main air stream into the aerosolizing chamber to mix with the particles to form a fine, low density, low velocity, dry mist of powdered medecine for inhalation by the user.

Drugs covered by this patent

Patent Metadata

Patent number
CA2147260C
Jurisdiction
CA
Classification
—
Expires
1999-04-13
Drug substance claim
No
Drug product claim
No
Assignee
Dura Pharmaceuticals Inc
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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