Emergency mask
Patent 4677976 Issued on July 7, 1987. Estimated Expiration Date: 
July 7, 2004. 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.
July 7, 2004. 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 1928238 2284949 2893387 3072119 3161491 3621841 Personal emergency breathing hood with nose blocking device Universal canister mount Patent #: 4453544 InventorsAssigneeApplicationNo. 06/594973 filed on 03/27/1984US Classes:128/201.25, Means for removing substance from respiratory gas128/206.15, With gas flow control valve128/206.17With separate filter encircling element, or housing, securing filter on maskExaminersPrimary: Recla, Henry J.Attorney, Agent or FirmInternational ClassesA62B 23/00 (20060101)A62B 18/04 (20060101) A62B 23/02 (20060101) A62B 18/00 (20060101) Foreign Application Priority Data1983-04-01 JPAbstractThe disclosed emergency mask comprises a hood, a face piece in the hood for respiration, and a canister-holder secured to the outer surface of the hood and communicating with the face piece. The canister-holder has an inlet opening to hold a canister containing antidote and check valves to prevent the user's expiration from entering the canister.Field of SearchWith gas flow control valveWith separate filter encircling element, or housing, securing filter on mask Including body or head supported means covering user's scalp And nose and mouth also covered Means for removing substance from respiratory gas Having valve, or valve control, structure Garment associated with head cover With frame, shaping means, reinforcement, or filter formed of wire Covering nose and mouth Including means inserted in mouth | |
