| 发明名称 |
Method of producing gemstone quality topaz |
| 摘要 |
Gemstone quality topaz is produced by a procedure which involves irradiating the topaz with fast neutrons at elevated temperature to an exposure level of at least about 1017 cm-2 followed by irradiation with electrons or gamma rays.
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| 申请公布号 |
US5477055(A) |
申请公布日期 |
1995.12.19 |
| 申请号 |
US19940304503 |
申请日期 |
1994.09.12 |
| 申请人 |
OSTRO GEMS |
发明人 |
SKOLD, KURT;SVENDSEN, ERIK;YELON, WILLIAM |
| 分类号 |
C30B33/00;G21H5/00;(IPC1-7):G21G5/00;A61N5/00 |
主分类号 |
C30B33/00 |
| 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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