Number | Date | Country | Kind |
---|---|---|---|
3114072 | Apr 1981 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3531523 | Nelson et al. | Sep 1970 |
Number | Date | Country |
---|---|---|
10249 | Aug 1979 | EPX |
0023725 | Feb 1981 | EPX |
2261918 | Jun 1973 | DEX |
2304006 | Aug 1973 | DEX |
2311638 | Sep 1973 | DEX |
2001635 | Feb 1979 | GBX |
Entry |
---|
Chemical Abstracts, vol. 76, (1972), No. 158359c. |