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Details for Patent: 6,543,448

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Summary for Patent: 6,543,448

Title: Apparatus and methods for dispersing dry powder medicaments
Abstract:A method for aerosolizing a powdered medicament comprises coupling a powder inlet end of a feed tube with a penetration in a receptacle containing the powder. Powder is drawn upward through the tube and dispersed in a high pressure gas stream flowing past a portion of the feed tube. Apparatus comprise the feed tube mounted within a base enclosure proximate a holder for one or more receptacles, which may be in the form of a cartridge containing a plurality of receptacles formed in a continuous web. The cartridge may be reciprocated relative to the feed tube and a separate piercing mechanism in order to sequentially piercing the receptacle and thereafter couple the feed tube through the resulting penetration for extracting the powder. Alternatively, penetration(s) through the receptacle may be formed as the feed tube is coupled, or some penetrations formed prior to coupling with other penetrations formed at the time of coupling.
Inventor(s): Smith; Adrian E. (Belmont, CA), Burr; John D. (Redwood City, CA), Etter; Jeffrey W. (Castro Valley, CA), Axford; George S. (Menlo Park, CA), Anthony; Jack M. (Palo Alto, CA)
Assignee: Inhale Therapeutic Systems, Inc. (San Carlos, CA)
Application Number:09/583,300
Patent Claim Types:
see list of patent claims
Device; Use;
Patent Metrics:
Source: PatentQuant.com
Field: Medical technology
Back Citations: 127th percentile
Forward Citations: 5th percentile

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Premature patent expiration for: 6,543,448

Expiration due to failure to pay maintenance fee

Patent Number Expiration Date
6,543,448 April 08, 2011

International Patent Family for Patent: 6,543,448

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Japan2006077032► subscribe
Japan2008163033► subscribe
Spain2203792► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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