| Number | Date | Country | Kind |
|---|---|---|---|
| 3506117 | Feb 1985 | DEX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 2105828 | Wilson | Jan 1938 | |
| 2567351 | Rievesehl | Sep 1951 | |
| 2812327 | Ohnacker et al. | Nov 1957 | |
| 3468885 | Sanne et al. | Sep 1969 | |
| 3472845 | Thiele | Oct 1969 | |
| 3478096 | Cyba | Nov 1969 | |
| 3651067 | Elpern et al. | Mar 1972 | |
| 3673260 | Esclamadon | Jun 1972 | |
| 3790569 | Mauvernay et al. | Feb 1974 | |
| 3840605 | Gordon | Oct 1974 | |
| 3891709 | Higuchi et al. | Jun 1975 | |
| 4299957 | Brennan | Nov 1981 | |
| 4474988 | Kaiser | Oct 1984 |
| Number | Date | Country |
|---|---|---|
| 162899 | Apr 1949 | DEX |
| 193860 | Dec 1957 | DEX |
| 267634 | Jul 1950 | CHX |
| 331991 | Sep 1958 | CHX |
| 1351505 | May 1974 | GBX |
| 1352286 | May 1974 | GBX |
| 1549123 | Jul 1979 | GBX |
| 1590148 | May 1981 | GBX |
| Entry |
|---|
| Eprova Ltd., Chemical Abstracts, vol. 53 (1959) 18067c. |