Process of detecting oil dispersed in well drilling fluids,申请号US19420450605-传众专利搜索

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发明名称	Process of detecting oil dispersed in well drilling fluids
摘要
申请公布号	US2422852(A)	申请公布日期	1947.06.24
申请号	US19420450605	申请日期	1942.07.11
申请人	NATIONAL LEAD COMPANY	发明人	RATCLIFFE GEORGE L.
分类号	E21B49/00	主分类号	E21B49/00
代理机构		代理人
主权项
地址

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