Inventor
ITOH HISATO
JP50 patents
⚠️ This page may combine multiple inventors who share the name “ITOH HISATO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUI TOATSU CHEMICALS
43 patentsUS5578419ANov 26, 1996
Dyes for color filters, and photosensitive resist resin composition containing the same
MITSUI TOATSU CHEMICALS46 citations96
US4808503AFeb 28, 1989
Electrophotographic receptors with charge generating azo-substituted tetraphenyl-thiophene or thiophene 1,1-dioxide
MITSUI TOATSU CHEMICALS36 citations93
US5751483AMay 12, 1998
Color filter having polarizability
MITSUI TOATSU CHEMICALS26 citations92
US5739298AApr 14, 1998
Water-soluble azo compounds
MITSUI TOATSU CHEMICALS25 citations92
US5446135AAug 29, 1995
Sulfonyloxy substituted tris-azoaryl dyes and copper complex salts thereof and polarizing films dyed therewith
MITSUI TOATSU CHEMICALS27 citations92
US5380842AJan 10, 1995
Phthalocyanine compounds and usage thereof
MITSUI TOATSU CHEMICALS28 citations92
US5318856AJun 7, 1994
Water-soluble azo dyes and polarizing films using the dyes
MITSUI TOATSU CHEMICALS38 citations92
US5124067AJun 23, 1992
Near infrared absorbers and display/recording materials using the same
MITSUI TOATSU CHEMICALS32 citations92
US5024926AJun 18, 1991
Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
MITSUI TOATSU CHEMICALS39 citations92
US4960538AOct 2, 1990
1,2-naphthalocyanine near-infrared absorbent and recording/display materials using same
MITSUI TOATSU CHEMICALS24 citations92
US5695911ADec 9, 1997
Optical recording medium
MITSUI TOATSU CHEMICALS7 citations74
US5548073AAug 20, 1996
Water-soluble azo compounds
MITSUI TOATSU CHEMICALS5 citations74
US5482986AJan 9, 1996
Benzopyran compound and use of the same
MITSUI TOATSU CHEMICALS7 citations74
US5482804AJan 9, 1996
Resin composition for color filter
MITSUI TOATSU CHEMICALS14 citations74
US5446141AAug 29, 1995
Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
MITSUI TOATSU CHEMICALS9 citations74
US5423100AJun 13, 1995
Water-soluble azo compounds and polarizing films using the compounds
MITSUI TOATSU CHEMICALS7 citations74
US5358833AOct 25, 1994
Amorphous phthalocyanine compound or mixture of amorphous phthalocyanine compounds, and method for preparing same
MITSUI TOATSU CHEMICALS11 citations74
US5350843ASep 27, 1994
Halogenated phthalocyanine compound, method for preparing same
MITSUI TOATSU CHEMICALS9 citations74
US5280114AJan 18, 1994
Halogenation of alkoxyphthalocyanine
MITSUI TOATSU CHEMICALS11 citations74
US4970021ANov 13, 1990
Phthalocyanine compounds and utility thereof
MITSUI TOATSU CHEMICALS9 citations74
US5639809AJun 17, 1997
Azo compounds and polarizing films using the compounds
MITSUI TOATSU CHEMICALS15 citations73
US5449587ASep 12, 1995
Compact disk-write once type optical recording media
MITSUI TOATSU CHEMICALS7 citations73
US5446142AAug 29, 1995
Phthalocyanine and naphthalocyanine light-absorbing compound and optical recording medium containing same
MITSUI TOATSU CHEMICALS17 citations73
US5409634AApr 25, 1995
Near infrared absorbers and display/recording materials using the same
MITSUI TOATSU CHEMICALS7 citations73
US5270463ADec 14, 1993
Halogenated alkoxyphthalocyanines
MITSUI TOATSU CHEMICALS14 citations73
US5235104AAug 10, 1993
Hydrazones and electrophotographic photoreceptors comprising them
MITSUI TOATSU CHEMICALS9 citations73
US5132190AJul 21, 1992
Hydrozones and electrophotographic photoreceptors comprising them
MITSUI TOATSU CHEMICALS8 citations73
US5618868AApr 8, 1997
Polarizing film of a hydrophilic polymer film containing a novel azo compound
MITSUI TOATSU CHEMICALS3 citations63
US5582774ADec 10, 1996
Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
MITSUI TOATSU CHEMICALS5 citations63
US5382465AJan 17, 1995
Anthraquinonic colorant and polarizing film containing the colorant
MITSUI TOATSU CHEMICALS3 citations63
US5252769AOct 12, 1993
Anthraquinonic colorant and polarizing film containing the colorant
MITSUI TOATSU CHEMICALS2 citations63
US5023343AJun 11, 1991
P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them
MITSUI TOATSU CHEMICALS1 citations63
US4963449AOct 16, 1990
P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them
MITSUI TOATSU CHEMICALS4 citations63
US5750229AMay 12, 1998
Phthalocyanine compound and optical recording medium containing it
MITSUI TOATSU CHEMICALS5 citations62
US5698682ADec 16, 1997
Azo compounds and polarizing films using the compounds
MITSUI TOATSU CHEMICALS3 citations62
US5646273AJul 8, 1997
Phthalocyanine compound and optical recording medium containing it
MITSUI TOATSU CHEMICALS5 citations62
US5334714AAug 2, 1994
Method for preparing alkoxyphthalocyanine
MITSUI TOATSU CHEMICALS4 citations62
US5220010AJun 15, 1993
Method for preparation alkoxyphthalocyanine
MITSUI TOATSU CHEMICALS3 citations60
US5773172AJun 30, 1998
Color filter having novel dyestuff
MITSUI TOATSU CHEMICALS1 citations52
US5750599AMay 12, 1998
Quinophthalone compounds and polarizing films using same
MITSUI TOATSU CHEMICALS0 citations52
US5659039AAug 19, 1997
Quinophthalone compounds
MITSUI TOATSU CHEMICALS1 citations52
US5387678AFeb 7, 1995
Halogenation process of phthalocyanine and halogenated alkoxyphthalocyanine
MITSUI TOATSU CHEMICALS0 citations52
US4808507AFeb 28, 1989
Electrophotographic photoreceptor 2-Phenyl-benzooxazole bisazo based
MITSUI TOATSU CHEMICALS0 citations52
MITSUI CHEMICALS INC
7 patentsUS5948597ASep 7, 1999
Dyes for color filters and photosensitive resist resin composition containing the same
MITSUI CHEMICALS INC6 citations74
US5789137AAug 4, 1998
Dyes for color filters and photosensitive resist resin composition containing the same
MITSUI CHEMICALS INC5 citations74
US6203725B1Mar 20, 2001
Luminescent compound for controlling traveling and method for controlling traveling using the same
MITSUI CHEMICALS INC11 citations70
US6306550B1Oct 23, 2001
Color filters
MITSUI CHEMICALS INC4 citations63
US6051360AApr 18, 2000
Dyestuffs and resin compositions
MITSUI CHEMICALS INC4 citations63
US5952477ASep 14, 1999
Azo compound and polarizing film
MITSUI CHEMICALS INC3 citations63
US6242651B1Jun 5, 2001
Process for the preparation of N,N′-dialkylalkanediamines
MITSUI CHEMICALS INC2 citations58