Number | Date | Country | Kind |
---|---|---|---|
75.19408 | Jun 1975 | FR | |
76.11140 | Apr 1976 | FR |
Number | Name | Date | Kind |
---|---|---|---|
3562253 | Twrown | Feb 1971 |
Number | Date | Country |
---|---|---|
224,638 | Dec 1972 | OE |
1,136,793 | Dec 1968 | UK |
Entry |
---|
Voronkov et al., Chemical Abstracts, vol. 76, 3730t (1972). |