Number | Name | Date | Kind |
---|---|---|---|
3691729 | De Rooy et al. | Sep 1972 |
Number | Date | Country |
---|---|---|
1248639 | Aug 1967 | DEX |
1541273 | Apr 1968 | FRX |
49-13770 | Mar 1974 | JPX |
Entry |
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Zardi et al, Recycle Carbamate via Ejector, "Hydrocarbon Processing", vol. 49, (No. 4), pp. 115-116 (1970). |