Prefilled two-compartment syringe
Patent 4171698 Issued on October 23, 1979. Estimated Expiration Date: 
August 15, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 15, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1234582 1279069 2841145 2869543 3370754 3477432 3570486 3724460 3785379 InventorAssigneeApplicationNo. 05/824463 filed on 08/15/1977US Classes:604/88SeptumExaminersPrimary: Yasko, John D.Attorney, Agent or FirmInternational ClassesA61M 5/28 (20060101)A61M 5/315 (20060101) AbstractA prefilled, ready to use, disposable syringe wherein a fluid medicament and a diluent therefor are sealed in two separate telescoping syringe barrels. A medicinal powder is sealed in an outer barrel adjacent the nozzle section by means of a pierceable stopper and the diluent is sealed in an inner barrel between another pierceable stopper and a plunger stopper. A double-pointed cannula is positioned between the two pierceable stoppers by means of a telescoping guide arrangement. Movement of the plunger stopper inwardly in the inner barrel initially effects a piercing of both pierceable stoppers and intermixing of the medicinal powder with the diluent. Continued movement of the plunger stopper will expel the mixed medicament from the syringe. | |
