Drilling fluid compositions,申请号US19490105067-传众专利搜索

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发明名称	Drilling fluid compositions
摘要
申请公布号	US2542020(A)	申请公布日期	1951.02.20
申请号	US19490105067	申请日期	1949.07.15
申请人	UNION OIL COMPANY OF CALIFORNIA	发明人	FISCHER PAUL W.
分类号	C09K8/32	主分类号	C09K8/32
代理机构		代理人
主权项
地址

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