Number | Date | Country | Kind |
---|---|---|---|
3702363 | Jan 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2315329 | Hood et al. | Mar 1943 | |
3406120 | Hagemeyer et al. | Oct 1968 | |
3721632 | Miller et al. | Mar 1973 | |
3948759 | King et al. | Apr 1976 |
Entry |
---|
Roempps Chemie-Lexikon (edited by O. A. Neumueller) 8th Edition, Stuttgart, vol. 3, pp. 2052-2058. |
Ser. No. 142,202, 1-11-88, Aulich et al. |