Number | Date | Country | Kind |
---|---|---|---|
43 26 128.0 | Aug 1993 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3271106 | Nylander | Sep 1966 | |
3941667 | Von Semel | Mar 1976 | |
4132759 | Schafer | Jan 1979 | |
4261803 | Suhara | Apr 1981 |
Number | Date | Country |
---|---|---|
1209562 | Aug 1966 | DEX |
3805266 | Aug 1989 | DEX |
Entry |
---|
Ullmanns Encyklopadie der technischen Chemie, vol. 9, pp. 338-340. |