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经营范围
发明名称
MINERAL GRINDING AIDS
摘要
申请公布号
US3492138(A)
申请公布日期
1970.01.27
申请号
USD3492138
申请日期
1967.05.15
申请人
W.R. GRACE & CO.
发明人
FRANK G. SERAFIN
分类号
B01J2/00;C04B24/02;C04B24/16;(IPC1-7):C04B7/54
主分类号
B01J2/00
代理机构
代理人
主权项
地址
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