Inventor
KAJIMOTO NOBUYUKI
JP19 patents
Patents
19 patentsUS4775733AOct 4, 1988
High-refractivity plastic lens resin formed by reacting at least one polyisocyanate with at least one polythiol
MITSUI TOATSU CHEMICALS186 citations99
US4689387AAug 25, 1987
S-alkyl thiocarbamate base lens resin
MITSUI TOATSU CHEMICALS197 citations99
US5753730AMay 19, 1998
Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur-containing urethane resin lens and lens prepared thereby
MITSUI TOATSU CHEMICALS111 citations98
US4946923AAug 7, 1990
S-alkyl thiocarbamate base resin, plastic lens comprising the resin, and process for making the lens
MITSUI TOATSU CHEMICALS57 citations96
US4680369AJul 14, 1987
Sulfur-containing polyurethane base lens resin
MITSUI TOATSU CHEMICALS56 citations96
US5594088AJan 14, 1997
Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur containing urethane resin lens and lens prepared thereby
MITSUI TOATSU CHEMICALS47 citations93
US4791185ADec 13, 1988
High-refractivity plastic lens resin formed from a polyisocyanate and a polythiol
MITSUI TOATSU CHEMICALS38 citations93
US5126388AJun 30, 1992
Highly-refractive plastic lens and process for making the lens
MITSUI TOATSU CHEMICALS25 citations92
US5021503AJun 4, 1991
Resin for plastic lens having high-refractive index, lens comprising the resin, and method for preparation of the lens
MITSUI TOATSU CHEMICALS26 citations92
US5013496AMay 7, 1991
Process for molding a highly-refractive plastic lens
MITSUI TOATSU CHEMICALS27 citations92
US4929707AMay 29, 1990
Polyurethane base lens resin, plastic lens comprising the resin and preparation method of the lens
MITSUI TOATSU CHEMICALS47 citations92
US4780522AOct 25, 1988
Sulfur-containing polyurethane base lens resin
MITSUI TOATSU CHEMICALS28 citations92
US4804783AFeb 14, 1989
Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines
MITSUI TOATSU CHEMICALS22 citations82
US4952731AAug 28, 1990
Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines
MITSUI TOATSU CHEMICALS5 citations74
US4918186AApr 17, 1990
Process for producing cyclic ureas
MITSUI TOATSU CHEMICALS7 citations74
US4871875AOct 3, 1989
Process for producing diphenylamines or N,N'-diphenylphenylenediamines
MITSUI TOATSU CHEMICALS11 citations74
US4731453AMar 15, 1988
Process for producing 1, 3-dialkyl-2-imidazolidinone
MITSUI TOATSU CHEMICALS11 citations73
US4900820AFeb 13, 1990
Process for producing cyclic ureas
MITSUI TOATSU CHEMICALS3 citations63
US4668793AMay 26, 1987
Process for producing 1,3-dimethyl-2-imidazolidinone
MITSUI TOATSU CHEMICALS5 citations61