发明名称 |
PROCESS FOR MAKING REFRACTORY METAL MATERIAL |
摘要 |
An improved process for making refractory metal material is disclosed wherein in the process of manufacturing the material, the additional steps of treating the material in a liquid anhydrous sodium hydroxide bath, in a nitric acid bath, and finally in a hot water bath for specified periods of time are incorporated into the process.
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申请公布号 |
US3649260(A) |
申请公布日期 |
1972.03.14 |
申请号 |
USD3649260 |
申请日期 |
1970.02.27 |
申请人 |
SYLVANIA ELECTRIC PRODUCTS INC. |
发明人 |
DAVID M. DENNISTON;DAVID A. SHANKS;NEVILLE H. SIMPSON |
分类号 |
C23G1/32;(IPC1-7):B22F3/24 |
主分类号 |
C23G1/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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