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经营范围
发明名称
Process for lowering residual tantalum values in niobium
摘要
申请公布号
US4948570(A)
申请公布日期
1990.08.14
申请号
US19890378319
申请日期
1989.07.11
申请人
TELEDYNE INDUSTRIES, INC.
发明人
SOMMERS, JAMES A.
分类号
C01G33/00;C01G35/00
主分类号
C01G33/00
代理机构
代理人
主权项
地址
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