Number | Date | Country | Kind |
---|---|---|---|
3715869 | May 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3134792 | Kaspar et al. | May 1964 | |
3758523 | Philippson et al. | Sep 1973 | |
4591585 | Kerb et al. | May 1986 |
Number | Date | Country |
---|---|---|
3338212 | Oct 1983 | DEX |
3322285 | Dec 1984 | DEX |
2177700 | Jan 1987 | GBX |
Entry |
---|
J. Am. Chem. Soc. 82, pp. 5488 to 5493 (1960). |