Number | Date | Country | Kind |
---|---|---|---|
3032358 | Aug 1980 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3255226 | McShane, Jr. | Jun 1966 | |
3707486 | Oertel et al. | Dec 1972 | |
3903124 | Schnabel et al. | Sep 1975 | |
3933701 | Puig et al. | Jan 1976 | |
3941822 | Babiec, Jr. et al. | Mar 1976 |
Number | Date | Country |
---|---|---|
1428578 | Mar 1976 | GBX |
Entry |
---|
Siefken, Annalen der Chemie, vol. 562, p. 135 (1949). |