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经营范围
发明名称
Process of concentrating ores and minerals by flotation
摘要
申请公布号
US1943758(A)
申请公布日期
1934.01.16
申请号
US19250011589
申请日期
1925.02.25
申请人
E. I. DU PONT DE NEMOURS & COMPANY, INC.
发明人
DOUGLASS WILLIAM A.
分类号
B03D1/012
主分类号
B03D1/012
代理机构
代理人
主权项
地址
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