Method of preventing loss of liquid from a well hole in the earth,申请号US19450625941-传众专利搜索

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发明名称	Method of preventing loss of liquid from a well hole in the earth
摘要
申请公布号	US2502191(A)	申请公布日期	1950.03.28
申请号	US19450625941	申请日期	1945.10.31
申请人	THE DOW CHEMICAL COMPANY	发明人	WILLIAMS GUY F.
分类号	E21B21/00	主分类号	E21B21/00
代理机构		代理人
主权项
地址

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