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| Number | Title | Issue Date |
| 4267320 | Cephalosporin antibiotics The invention provides novel antibiotic cefuroxime esters of the formula ##STR1## (wherein R1 is a primary or secondary alkyl group containing 1 to 4 carbon atoms and R2 is a primary or secondary alkyl group containing 1 to 6 ca... | 05/12/1981 |
| 4076913 | Solid or gel polymers containing a plurality of free hydrazone groups Novel polymers are provided which carry diazomethylene or hydrazonomethylene groups. Such polymers are of special use in immobilizing carboxylic acids, such as amino acids, with a view to subsequent chemical transformation of such acids, e.g. peptide synt... | 02/28/1978 |
