Inventor
WALKER DEREK
32 patents
⚠️ This page may combine multiple inventors who share the name “WALKER DEREK”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BRISTOL MYERS CO
16 patentsUS4424343AJan 3, 1984
Preparation of 1-N- ω-amino-α-hydroxyalkanoyl!kanamycin polysilylates and products
BRISTOL MYERS CO28 citations87
US4347354AAug 31, 1982
Preparation of 1-N-[ω-amino-α-hydroxyalkanoyl]aminoglycoside polysilylated antibiotics and products obtained therefrom
BRISTOL MYERS CO44 citations87
US4223135ASep 16, 1980
Production of cephalosporins
BRISTOL MYERS CO10 citations72
US4176131ANov 27, 1979
Chemical process
BRISTOL MYERS CO8 citations72
US4351766ASep 28, 1982
Production of penicillins
BRISTOL MYERS CO5 citations61
US4316017AFeb 16, 1982
Cephalosporin intermediates
BRISTOL MYERS CO2 citations61
US4518773AMay 21, 1985
"3-Carbamoyloxy cephalosporins"
BRISTOL MYERS CO2 citations60
US4426520AJan 17, 1984
3-Carbamoyloxy-cepham-4-carboxylic acid derivatives
BRISTOL MYERS CO2 citations60
US4374982AFeb 22, 1983
Cepham compounds
BRISTOL MYERS CO3 citations60
US4322347AMar 30, 1982
2-Carbamoyloxymethyl-penicillin derivatives
BRISTOL MYERS CO6 citations60
US4310459AJan 12, 1982
Process for producing carbamoyl substituted penams and carbamoyl substituted cephams from penicillin sulfoxide esters
BRISTOL MYERS CO5 citations60
US4316016AFeb 16, 1982
Cephalosporin intermediates
BRISTOL MYERS CO1 citations51
US4310458AJan 12, 1982
Production of penicillins
BRISTOL MYERS CO0 citations51
US4278600AJul 14, 1981
Production of penicillins
BRISTOL MYERS CO0 citations51
US4240960ADec 23, 1980
Trimethylsilyl substituted penicillins
BRISTOL MYERS CO1 citations51
US4407755AOct 4, 1983
6-Amino penam derivatives
BRISTOL MYERS CO0 citations50
GLAXO LAB LTD
6 patentsUS4076913AFeb 28, 1978
Solid or gel polymers containing a plurality of free hydrazone groups
GLAXO LAB LTD9 citations70
US4038469AJul 26, 1977
Aqueous insoluble polymers containing a plurality of diazomethylene groups
GLAXO LAB LTD17 citations70
US4059573ANov 22, 1977
Extraction of N-blocked amino acids from aqueous media
GLAXO LAB LTD5 citations61
US4083837AApr 11, 1978
Oxidation of hydrazones to the corresponding diazo compound
GLAXO LAB LTD4 citations54
US4067858AJan 10, 1978
Acid derivative immobilized cephalosporin carboxylic carrying polymer
GLAXO LAB LTD0 citations48
US3960843AJun 1, 1976
Process for the preparation of esters of N-blocked penicillin acids which comprises reacting the acid or a salt thereof with a primary amine and a nitrosating agent
GLAXO LAB LTD0 citations33
YORKSHIRE IMPERIAL PLASTICS
3 patentsUS4340344AJul 20, 1982
Apparatus for manufacture of thermoplastics pipe
YORKSHIRE IMPERIAL PLASTICS27 citations78
US4323535AApr 6, 1982
Manufacture of thermoplastics pipe
YORKSHIRE IMPERIAL PLASTICS3 citations58
US4318681AMar 9, 1982
Manufacture of thermoplastics pipe
YORKSHIRE IMPERIAL PLASTICS1 citations48
SCHERING CORP
3 patentsUS5571910ANov 5, 1996
Process for the preparation of intermediates useful in the synthesis of cephalosporins
SCHERING CORP4 citations73
US5660711AAug 26, 1997
Process for the preparation of intermediates useful in the synthesis of cephalosporins
SCHERING CORP5 citations72
US5847116ADec 8, 1998
Process for the preparation of intermediates useful in the synthesis of cephalosporins
SCHERING CORP0 citations50