Nasal oxygen therapy mask
Patent 4266540 Issued on May 12, 1981. Estimated Expiration Date: 
October 13, 1998. 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.
October 13, 1998. 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 1176886 2241535 2260701 2843122 2859748 3603306 3889671 Breathing mask and variable concentration oxygen diluting device therefor Patent #: 3977432 InventorsApplicationNo. 05/951744 filed on 10/13/1978US Classes:128/207.13, Covering nose only128/204.25, Gas stream passed through jet nozzle or venturi passage128/205.11, Means for varying air/oxygen ratio128/205.25, Face mask covering a breathing passage128/207.12Valve for controlling gas flowExaminersPrimary: Recla, Henry J.Attorney, Agent or FirmInternational ClassA61M 16/06 (20060101)AbstractAn oxygen mask which covers only a patient's nose is attached to the patient by a flexible strap. A clip is attached to the outer surface of the mask to hold the portion of the mask firmly in place relative to the bridge of the patient's nose. An exhaust port is included in the mask. The mask also includes an integral mixing valve for mixing air and gas such as oxygen to achieve a prescribed percentage mixture as may be required for patient therapy. The mixing valve is supported by a support member attached to the mounting strap. | |
