Patent ID: 11957790
Assignee: nan
Field: Pharmaceuticals (Chemistry)
Classification: CPC A  F | IPC A  F

Claim 6:
7. A lyophilization syringe assembly comprising the:
a. a lyophilization syringe comprising an elongate central barrel characterized by an exterior surface, an interior surface, and a hollow interior bore configured to retain both an initial product in liquid and lyophilized forms, an open distal tip configured to engage a hypodermic needle assembly; and an open proximal end configured to removably receive a stopper; and
b. stopper removably mounted to the open proximal end of the elongate central barrel of said syringe, wherein said stopper includes (i) at least one vent channel disposed along a lateral surface, and (ii) at least one circumferential sealing rib proximal to a distal end of said stopper at least one vent channel that engages said interior surface to form a gas and fluid tight seal that guards against contamination and leakage of syringe barrel contents.