Number | Date | Country | Kind |
---|---|---|---|
6-290785 | Nov 1994 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3102849 | Vander et al. | Sep 1963 | |
5348567 | Chappell | Sep 1994 | |
5461185 | Forsberg et al. | Oct 1995 |
Number | Date | Country |
---|---|---|
61-26898 | Feb 1986 | JPX |
6-96852 | Apr 1994 | JPX |
Entry |
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Kagaku Binran (2nd edition) edited by The Chemical Society of Japan, p. 667 (1958) "Rare Metal Dictionary" edited by Japan Technology Transfer Association, p. 209, published by Japan Techno System Co., Ltd. |