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Details for Patent: 4,668,218

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Summary for Patent: 4,668,218

Title: Indicating means for a dosage dispensing device
Abstract:An indicating means in a dosage dispensing device for medicaments, particularly a dosage inhaler which indicates a number of dosages administered from the dosage dispensing device. The indicating means includes a rotatable disc (1) having apertures (2) passing therethrough which can be filled with a medicament in particle form. By rotating the disc the apertures can be brought into an air channel or duct (3) through which air is inhaled. The rotatable disc has associated with a central portion a spiral groove or ridge (4) which can engage with peripheral teeth (8) on a toothed wheel (6), such that rotation of the disc (1) results in rotation of the toothed wheel and the toothed wheel is provided with one or more markings (9) which are visible from outside the dosage inhaler upon rotating the disc a predetermined number of times.
Inventor(s): Virtanen; Risto (Nurmij/a/ rvi, FI)
Assignee: Aktiebolaget Draco (SE)
Application Number:06/850,959
Patent Claim Types:
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Delivery; Device;

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Foreign Priority and PCT Information for Patent: 4,668,218

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Sweden8501806Apr 12, 1985

International Patent Family for Patent: 4,668,218

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Israel78233► subscribe
Ireland57522► subscribe
Ireland860897► 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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