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经营范围
发明名称
Drilling fluids incorporating derivatives of lignitic materials
摘要
申请公布号
US2813827(A)
申请公布日期
1957.11.19
申请号
US19530401070
申请日期
1953.12.29
申请人
GULF RESEARCH & DEVELOPMENT COMPANY
发明人
CROWLEY EDGAR I.;FRANKE NORMAN W.
分类号
C09K8/03
主分类号
C09K8/03
代理机构
代理人
主权项
地址
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