Number | Date | Country | Kind |
---|---|---|---|
2757176 | Dec 1977 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2124151 | Rothrock | Jul 1938 | |
2572256 | Garner et al. | Oct 1951 | |
4102840 | Pusch | Jul 1978 |
Number | Date | Country |
---|---|---|
1230805 | Dec 1966 | DEX |
1670153 | Jul 1970 | DEX |
Entry |
---|
Petersen, H., Angewanote Chemie, 76 (1964), pp. 909-919. |