US Patent
US11957832 — Breath actuated inhaler
Formulation · Assigned to Norton Waterford Ltd · Expires 2041-05-05 · 15y remaining
Vulnerability score
38/100
Strong — defensible against typical IPR challenges
What this patent protects
This patent protects a breath-actuated metered dose inhaler with a canister fire system that fires a medicament-containing canister in response to patient inhalation.
USPTO Abstract
A breath actuated metered dose inhaler may comprise a canister fire system configured to fire a medicament containing canister in response to patient inhalation. The canister fire system may comprise a pneumatic force holding unit and having a rest configuration in which a metering valve of the canister is in a refill configuration; a prepared configuration in which a canister actuation force is retained by the pneumatic force holding unit and the canister fire system is actuatable by patient inhalation induced airflow; and a fire configuration in which the metering valve is in a dose delivery position. When in the prepared configuration, the force retained by the pneumatic force holding unit may be reduced by less than about 6% over a period of 5 minutes, preferably less than about 3% over a period of 5 minutes.
Drugs covered by this patent
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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