Process for extracting helium,申请号US19290382221-传众专利搜索

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发明名称	Process for extracting helium
摘要
申请公布号	US1850529(A)	申请公布日期	1932.03.22
申请号	US19290382221	申请日期	1929.07.30
申请人	THE HELIUM COMPANY	发明人	BOTTOMS ROBERT ROGER
分类号	F25J3/02;F25J3/08	主分类号	F25J3/02
代理机构		代理人
主权项
地址

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