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| Patents for C07C 273 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups (3,705) |
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| 01/20/1976 | US3933753 Alkenylaromatic polymers with α-ketoalhydic groups | | 01/20/1976 | US3933468 Herbicidal compositions | | 01/13/1976 | US3932504 From nh3 and co2; decomposition and reuse of carbamate by-product | | 01/06/1976 | US3931316 Method of preparing O-methyl-isourea hydrogen sulfate and O-methyl-isourea sulfate from cyanamide | | 01/06/1976 | US3931311 N,N,N-trisubstituted N-halogenomethylurea and thiourea compounds and process for their preparation |
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