P

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 patents
US5578419ANov 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 patents