| Number | Date | Country | Kind |
|---|---|---|---|
| 76 24618 | Aug 1976 | FRX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 2396275 | Kirby | Mar 1946 | |
| 2423460 | McQueen | Jul 1947 | |
| 2428108 | McQueen | Sep 1947 | |
| 2463838 | Wilson | Mar 1949 | |
| 2994693 | Blake et al. | Aug 1961 | |
| 3081281 | Beghin | Mar 1963 | |
| 3147235 | Zweidler et al. | Sep 1964 | |
| 3251743 | Hahn et al. | May 1966 | |
| 3278486 | Meek et al. | Nov 1966 | |
| 3403200 | Randall | Sep 1968 | |
| 3535255 | Kalopissis et al. | Oct 1970 | |
| 3617165 | Kalopissis et al. | Nov 1971 | |
| 3720653 | Kalopissis et al. | Mar 1973 | |
| 3743622 | Wagner et al. | Jul 1973 | |
| 3790512 | Wagner et al. | Feb 1974 | |
| 3915635 | Kalopissis et al. | Oct 1975 | |
| 3919265 | Bugaut et al. | Nov 1975 | |
| 4013787 | Varierberghe et al. | Mar 1977 |
| Number | Date | Country |
|---|---|---|
| 1167161 | Oct 1969 | GBX |
| Entry |
|---|
| Chem. Abstracts, vol. 61 (1964), 1343h, Bykov et al. |
| Chem. Abstracts, vol. 69 (1968), 20071b, Krasovitskii et al. |
| Chem. Abstracts, vol. 8 (1974), 49064q, Gangneux. |
| Chem. Abstracts, vol. 85 (1976), 178021a, Fatten et al. |