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发明名称
Purification of refractory metals
摘要
申请公布号
US2778726(A)
申请公布日期
1957.01.22
申请号
US19520284866
申请日期
1952.04.29
申请人
E. I. DU PONT DE NEMOURS & COMPANY
发明人
JR. CHARLES H. WINTER,;TULLY JOHN N.
分类号
C22B34/00
主分类号
C22B34/00
代理机构
代理人
主权项
地址
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