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Details for Patent: 5,435,076

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Summary for Patent: 5,435,076

Title: Injection device
Abstract:A device for an injection apparatus, including a dual-chamber injection cartridge. The cartridge includes a front end, a rear end, a front opening in the vicinity of a front end of the cartridge, a front chamber located in the vicinity of the front opening and including a drug freeze-dried in the front chamber, a rear chamber including a liquid component, a movable wall separating the front chamber and the rear chamber, a bypass for transferring the liquid component between the front chamber and the rear chamber, and a rear piston. The cartridge is slidably arranged within a cylindrical sleeve substantially the same length as the cartridge. A stopper is located in the vicinity of the front opening of the cartridge. The stopper is directed rearwardly coaxially with the cartridge, wherein as the sleeve is displaced rearwardly after the freeze-drying of the drug, the stopper enters the front opening of the cartridge to sealingly close the cartridge. An actuator for actuating the rear piston may be attached in the vicinity of the rear end of the cartridge.
Inventor(s): Hjertman; Birger (Vallingby, SE), Levander; Gustav (Bromma, SE), Ljungquist; Olle (Taby, SE)
Assignee: Pharmacia Aktiebolag (SE)
Application Number:08/142,408
Patent Claim Types:
see list of patent claims
Device; Delivery; Use; Process; Formulation;

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Foreign Priority and PCT Information for Patent: 5,435,076

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Sweden9201247Apr 21, 1992
PCT Information
PCT FiledApril 16, 1993PCT Application Number:PCT/SE93/00336
PCT Publication Date:October 28, 1993PCT Publication Number: WO93/20869

International Patent Family for Patent: 5,435,076

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria133567<disabled in preview>
Australia4273993<disabled in preview>
Australia663794<disabled in preview>
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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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