Inventor
CHAN KA-KONG
40 patents
Patents
40 patentsUS4171318AOct 16, 1979
Fluorinated polyenes
HOFFMANN LA ROCHE19 citations81
US4642364AFeb 10, 1987
Unsaturated eicosanoic acids
HOFFMANN LA ROCHE11 citations74
US4345084AAug 17, 1982
Unsaturated eicosanoic acids
HOFFMANN LA ROCHE10 citations74
US4045475AAug 30, 1977
Optically active alcohols and lower esters thereof
HOFFMANN LA ROCHE7 citations74
US4898962AFeb 6, 1990
Natural vitamin E intermediate
HOFFMANN LA ROCHE9 citations72
US5147871ASep 15, 1992
Anti-bacterial cephalosporin compounds
HOFFMANN LA ROCHE11 citations70
US4599443AJul 8, 1986
Unsaturated eicosanoic acids
HOFFMANN LA ROCHE3 citations63
US4110346AAug 29, 1978
Tetramethyl chromanyl pentane derivatives
HOFFMANN LA ROCHE1 citations63
US4100175AJul 11, 1978
Claisen intermediates
HOFFMANN LA ROCHE1 citations63
US4097495AJun 27, 1978
Tetramethyl-benzyloxy chromans
HOFFMANN LA ROCHE1 citations63
US4086249AApr 25, 1978
Tetramethyl chromanyl pentane amide
HOFFMANN LA ROCHE1 citations63
US4076739AFeb 28, 1978
Synthesis of vitamin E
HOFFMANN LA ROCHE1 citations63
US4029678AJun 14, 1977
Asymmetric synthesis
HOFFMANN LA ROCHE2 citations63
US4016178AApr 5, 1977
Synthesis of vitamin E
HOFFMANN LA ROCHE2 citations63
US4000169ADec 28, 1976
Asymmetric synthesis of optically active compounds
HOFFMANN LA ROCHE3 citations63
US4375563AMar 1, 1983
Fluorinated aromatic polyenes
HOFFMANN LA ROCHE4 citations62
US4201727AMay 6, 1980
Fluorinated aromatic polyenes
HOFFMANN LA ROCHE4 citations62
US4137246AJan 30, 1979
Fluorinated aromatic polyenes
HOFFMANN LA ROCHE4 citations62
US4914217AApr 3, 1990
Asymmetric synthesis of natural vitamin E
HOFFMANN LA ROCHE4 citations61
US4900476AFeb 13, 1990
Quinone intermediates for asymmetric synthesis of natural vitamin E
HOFFMANN LA ROCHE4 citations61
US4855085AAug 8, 1989
Asymmetric synthesis of natural vitamin E
HOFFMANN LA ROCHE2 citations61
US4831185AMay 16, 1989
Asymmetric synthesis of natural vitamin E
HOFFMANN LA ROCHE4 citations61
US4500462AFeb 19, 1985
Unsaturated eicosanoic acids
HOFFMANN LA ROCHE1 citations52
US4160865AJul 10, 1979
Asymmetric synthesis
HOFFMANN LA ROCHE0 citations52
US4151360AApr 24, 1979
Optically active amine salts
HOFFMANN LA ROCHE0 citations52
US4102909AJul 25, 1978
Optically active esters and amides
HOFFMANN LA ROCHE0 citations52
US4094885AJun 13, 1978
6(6-Substituted-2,5,7,8-tetramethyl-2-chromanyl)-3-methyl-4-hexenoic acid derivatives
HOFFMANN LA ROCHE0 citations52
US4094892AJun 13, 1978
Process for preparing optically active esters
HOFFMANN LA ROCHE0 citations52
US4093632AJun 6, 1978
6(6-Substituted-2,5,7,8-tetramethyl-2-chromanyl)-3-methyl hexanol derivatives
HOFFMANN LA ROCHE0 citations52
US4088662AMay 9, 1978
Optically active amides and process for producing the same
HOFFMANN LA ROCHE0 citations52
US4913851AApr 3, 1990
Asymmetric synthesis of natural vitamin E.
HOFFMANN LA ROCHE0 citations51
US4898953AFeb 6, 1990
Natural Vitamin E intermediate
HOFFMANN LA ROCHE0 citations51
US4395575AJul 26, 1983
5(Halophenyl)-2-fluoro-pentadienals
HOFFMANN LA ROCHE1 citations51
US4338253AJul 6, 1982
Fluorinated aromatic polyenes
HOFFMANN LA ROCHE1 citations51
US4335248AJun 15, 1982
Fluorinated polyenes
HOFFMANN LA ROCHE0 citations51
US4321209AMar 23, 1982
Fluorinated aromatic polyenes
HOFFMANN LA ROCHE1 citations51
US4299995ANov 10, 1981
Fluorinated polyenes
HOFFMANN LA ROCHE1 citations51
US4266073AMay 5, 1981
Fluorinated aromatic polyenes
HOFFMANN LA ROCHE1 citations51
US4231944ANov 4, 1980
Fluorinated polyenes
HOFFMANN LA ROCHE1 citations51
US4169100ASep 25, 1979
Fluorinated aromatic polyenes
HOFFMANN LA ROCHE0 citations51