Details for Patent: 5,497,944
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Summary for Patent: 5,497,944
Title: | Atomising devices and methods |
Abstract: | A metered dose inhaler for dispensing a fluid medicament as droplets of small mean particle size without the use of pressurized gas or liquefied propellants. A liquid drug is contained in a fluid reservoir, and metered quantities of the drug are successively presented into a reduced cross-section pressure chamber, with non-return valves controlling the flow of liquid through the device. The metered quantity of the drug is then subjected to a sudden and great increase in pressure by releasing a piston into the pressure chamber. The liquid drug is thereby ejected through an atomizing head, to reduce it to a fine atomized spray of small mean particle size, preferably less than approximately 12 micrometers. |
Inventor(s): | Weston; Terence E. (Woodbridge, GB2), Dunne; Stephen T. (Shotley, GB2) |
Assignee: | DMW (Technology) Limited (GB) |
Application Number: | 07/938,174 |
Patent Claim Types: see list of patent claims | Device; Use; Delivery; |
Drugs Protected by US Patent 5,497,944
Applicant | Tradename | Generic Name | Dosage | NDA | Approval Date | TE | Type | RLD | RS | Patent No. | Patent Expiration | Product | Substance | Delist Req. | Patented / Exclusive Use | Submissiondate |
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>Applicant | >Tradename | >Generic Name | >Dosage | >NDA | >Approval Date | >TE | >Type | >RLD | >RS | >Patent No. | >Patent Expiration | >Product | >Substance | >Delist Req. | >Patented / Exclusive Use | >Submissiondate |
Foreign Priority and PCT Information for Patent: 5,497,944
Foriegn Application Priority Data | ||
Foreign Country | Foreign Patent Number | Foreign Patent Date |
United Kingdom | 9006340 | Mar 21, 1990 |
United Kingdom | 9023767 | Nov 01, 1990 |
PCT Information | |||
PCT Filed | March 21, 1991 | PCT Application Number: | PCT/GB91/00433 |
PCT Publication Date: | October 03, 1991 | PCT Publication Number: | WO91/14468 |
International Family Members for US Patent 5,497,944
Country | Patent Number | Estimated Expiration | Supplementary Protection Certificate | SPC Country | SPC Expiration |
---|---|---|---|---|---|
Austria | 160947 | ⤷ Try a Trial | |||
Austria | 189413 | ⤷ Try a Trial | |||
Australia | 650870 | ⤷ Try a Trial | |||
Australia | 7548491 | ⤷ Try a Trial | |||
Brazil | 9106249 | ⤷ Try a Trial | |||
Canada | 2078683 | ⤷ Try a Trial | |||
Canada | 2206753 | ⤷ Try a Trial | |||
>Country | >Patent Number | >Estimated Expiration | >Supplementary Protection Certificate | >SPC Country | >SPC Expiration |