Method and apparatus for regenerating cold traps within liquid-metal systems
Patent 3941586 Issued on March 2, 1976. Estimated Expiration Date: 
March 2, 1993. 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.
March 2, 1993. 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 3618770 3622303 3831912 3854933 InventorApplicationNo. 581612 filed on 05/29/1975US Classes:75/378, Pressure sensed210/85, WITH ALARM, INDICATOR, REGISTER, RECORDER, SIGNAL OR INSPECTION MEANS376/312, By cold traps or hot traps423/461, Recovery or purification75/589Alkali metal, singly or in combinationExaminersPrimary: Andrews, R. L.Attorney, Agent or FirmAbstractOxide and hydride impurities of a liquid metal such as sodium are removed from a cold trap by heating to a temperature at which the metal hydroxide is stable in a molten state. The partial pressure of hydrogen within the system is measured to determine if excess hydride or oxide is present. Excess hydride is removed by venting hydrogen gas while excess oxide can be converted to molten hydroxide through the addition of hydrogen. The resulting, molten hydroxide is drained from the trap which is then returned to service at cold trap temperatures within the liquid-metal system. |
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