Number | Name | Date | Kind |
---|---|---|---|
2014404 | Weed | Sep 1935 | |
2173909 | Kritchervsky | Sep 1939 | |
2412217 | Havens | Dec 1946 | |
3473656 | Sel | Oct 1969 | |
3951786 | Petrovich | Apr 1976 | |
4225428 | Petrovich | Sep 1980 |
Number | Date | Country |
---|---|---|
1021302 | Dec 1977 | DEX |
Entry |
---|
Chem. Abst., 69, 1968, 793464. |
Chem. Absts., 78, 1973, 128755C |
Inst. min. metall, trans, sort C., 1973 82 Dec. 207, 13 Sob. esat et al. |