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经营范围
发明名称
Process of recovering oil from oil sands
摘要
申请公布号
US1822271(A)
申请公布日期
1931.09.08
申请号
US19310510331
申请日期
1931.01.21
申请人
COGGESHALL GEORGE W
发明人
COGGESHALL GEORGE W.
分类号
C09K8/584
主分类号
C09K8/584
代理机构
代理人
主权项
地址
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