Number | Date | Country | Kind |
---|---|---|---|
1-90375 | Apr 1989 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
1572766 | Chevalier et al. | Feb 1926 | |
2489316 | Proell | Nov 1949 | |
2732398 | Brice et al. | Jan 1956 | |
3829484 | Sowerby et al. | Aug 1974 | |
3919295 | Wechsberg et al. | Nov 1975 | |
4167525 | Kataoka et al. | Sep 1979 | |
4925975 | Aramaki et al. | May 1990 |
Entry |
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J. Chem. Soc. (1957), by J. Burdon et al., pp. 2574-2578. |