Number | Date | Country | Kind |
---|---|---|---|
3013273 | Apr 1980 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3973903 | Clarke | Aug 1976 | |
4281112 | Lehment et al. | Jul 1981 |
Number | Date | Country |
---|---|---|
2825296 | Dec 1979 | DEX |
2164645 | Mar 1973 | FRX |
Entry |
---|
Chemical Abstracts, Band 83, Nr. 4, 28, Jul. 1975, Pate 98, Nr. 29878s. |