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Generated: December 11, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,662,271

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Summary for Patent: 5,662,271

Title: Atomizing devices and methods
Abstract:A metered dose inhaler comprises a piston which is mounted in a cavity within a body, and is urged by a pre-loaded spring into a reduced cross-section pressure chamber. The piston may be loaded by means of an actuating rod having a handle, and may be latched in a loaded position by a latching means. A liquid drug (e.g. in aqueous solution) is contained in a collapsible bag. Metered quantities of the drug are successively presented in the pressure chamber, and then subjected to a sudden and great increase in pressure, to eject the liquid drug through an atomising head, to reduce it to fine atomised spray of small mean particle size--for example less than 30 micrometers. Non-return valves control the flow of liquid through the device. The sudden pressure pulse is caused be releasing the spring loaded piston, upon depressing an actuating button connected by the latching means.
Inventor(s): Weston; Terence Edward (Woodbridge, GB2), Dunne; Stephen Terence (Ipswich, GB2)
Assignee: Boehringer Ingelheim International GmbH (DE)
Application Number:08/459,458
Patent Claim Types:
see list of patent claims
Device; Delivery; Use;

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Foreign Priority and PCT Information for Patent: 5,662,271

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom9006340Mar 21, 1990
United Kingdom9023767Nov 01, 1990

International Patent Family for Patent: 5,662,271

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
China1199009► Subscribe
China1119182► Subscribe
Czech Republic283820► Subscribe
Germany69128419► Subscribe
Germany69131966► Subscribe
Denmark0521061► Subscribe
Denmark0627230► Subscribe
European Patent Office0521061► Subscribe
European Patent Office0627230► Subscribe
Spain2109943► 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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