Hypodermic syringe
Patent 4900311 Issued on February 13, 1990. Estimated Expiration Date: 
December 6, 2008. 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.
December 6, 2008. 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 ReferencesAutomatic protracting and locking hypodermic needle guard Shield assembly for hypodermic injection devices Injection devices Patent #: 4813940 InventorsApplicationNo. 280637 filed on 12/06/1988US Classes:604/198, Cover or protector for body entering conduit movable axially relative to one another604/263Removable cover or protector for body inserted conduitExaminersPrimary: Yasko, John D.Attorney, Agent or FirmInternational ClassA61M 005/32AbstractA hypodermic syringe has a needle guard of elliptical cross section which is releasable by compressing the needle guard along its major axis, and, which can be moved between an extended and a retracted position when released. Optionally, a compression spring is provided for urging the needle guard towards an extended position.Field of SearchCover or protector for body entering conduit movable axially relative to one anotherInjector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.) Removable cover or protector for body inserted conduit Portion of body entering conduit stored in material receiving syringe reservoir | |
