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经营范围
发明名称
Beneficiation of lubricating oils
摘要
申请公布号
US2175548(A)
申请公布日期
1939.10.10
申请号
US19360077016
申请日期
1936.04.29
申请人
THE STANDARD OIL COMPANY
发明人
MUSSELMAN JOHN M.;LANKELMA HERMAN P.
分类号
主分类号
代理机构
代理人
主权项
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