Inventor
HASEGAWA KIYOHARU
JP36 patents
Patents
36 patentsUS5281570AJan 25, 1994
Thermochromic materials
MITSUI TOATSU CHEMICALS49 citations92
US4574110AMar 4, 1986
Process for producing microcapsules and microcapsule slurry
MITSUI TOATSU CHEMICALS40 citations92
US4931420AJun 5, 1990
Temperature history indicator and its manufacturing method
MITSUI TOATSU CHEMICALS37 citations90
US4760108AJul 26, 1988
Microcapsule-containing water-base coating formulation and copying and/or recording material making use of said coating formulation
MITSUI TOATSU CHEMICALS21 citations79
US5447901ASep 5, 1995
Color-developing compositions and their use
MITSUI TOATSU CHEMICALS6 citations74
US5300473AApr 5, 1994
Recording material comprising crystal of fluoran compound
MITSUI TOATSU CHEMICALS6 citations73
US5270281ADec 14, 1993
Heat-sensitive recording materials and phenol compounds
MITSUI TOATSU CHEMICALS8 citations73
US5118756AJun 2, 1992
Reaction system modifier suitable for use in the productions of microcapsules
MITSUI TOATSU CHEMICALS14 citations73
US4480002AOct 30, 1984
Dyestuff-containing microscopic capsule suspension for record materials
MITSUI TOATSU CHEMICALS7 citations73
US4398753AAug 16, 1983
Pressure sensitive recording unit
MITSUI TOATSU CHEMICALS16 citations73
US5647896AJul 15, 1997
Color-developing agents and color-developing sheets
MITSUI TOATSU CHEMICALS17 citations72
US5525686AJun 11, 1996
Polyvalent metal salt of salicyclic acid resin and process for preparing it
MITSUI TOATSU CHEMICALS9 citations72
US4302396ANov 24, 1981
Chlorinated 4-methylphthalic anhydrides
MITSUI TOATSU CHEMICALS12 citations72
US5376615ADec 27, 1994
Color-developing compositions and their use
MITSUI TOATSU CHEMICALS4 citations63
US5324704AJun 28, 1994
Fluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparation
MITSUI TOATSU CHEMICALS2 citations63
US5260403ANov 9, 1993
Color-developing composition, aqueous suspension of the composition, and color-developing sheet produced using the suspension and suitable for use in pressure-sensitive copying paper
MITSUI TOATSU CHEMICALS4 citations63
US5220038AJun 15, 1993
Fluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparation
MITSUI TOATSU CHEMICALS1 citations63
US5208209AMay 4, 1993
Fluoran compounds, process for preparation thereof and recording materials comprising said compound
MITSUI TOATSU CHEMICALS5 citations63
US5194632AMar 16, 1993
Fluoran compound, useful in heat sensitive recording materials
MITSUI TOATSU CHEMICALS2 citations63
US5087706AFeb 11, 1992
Fluoran compounds, process for preparation thereof and recording materials comprising said compound
MITSUI TOATSU CHEMICALS2 citations63
US4997874AMar 5, 1991
Aqueous suspension and preparation method thereof
MITSUI TOATSU CHEMICALS7 citations63
US5391806AFeb 21, 1995
Heat-sensitive recording materials and phenol compounds
MITSUI TOATSU CHEMICALS5 citations62
US5306688AApr 26, 1994
Salicylic acid derivatives, the process for preparing the same and the heat-sensitive recording materials comprising thereof
MITSUI TOATSU CHEMICALS4 citations62
US5302571AApr 12, 1994
Crystals of fluoran compound, crystalline solvates thereof, process for their preparation and recording material comprising said crystal or said solvate
MITSUI TOATSU CHEMICALS2 citations62
US5300661AApr 5, 1994
Process for preparation of a recording material comprising a novel crystal of a fluoran compound
MITSUI TOATSU CHEMICALS4 citations62
US5283222AFeb 1, 1994
Recording material comprising novel crystalline fluoran and process for prepartion of the said crystalline fluoran
MITSUI TOATSU CHEMICALS2 citations62
US5185453AFeb 9, 1993
Crystal of fluoran compound
MITSUI TOATSU CHEMICALS2 citations62
US4735744AApr 5, 1988
Novel benzoquinone derivatives and production process thereof as well as use as color-developers suitable for recording materials
MITSUI TOATSU CHEMICALS5 citations62
US4632987ADec 30, 1986
Process for the preparation of triarylmethane compounds
MITSUI TOATSU CHEMICALS4 citations62
US4561000ADec 24, 1985
Heat-sensitive recording unit
MITSUI TOATSU CHEMICALS2 citations62
US4384871AMay 24, 1983
Dyestuff-containing microscopic capsule dispersion for record materials
MITSUI TOATSU CHEMICALS3 citations62
US5691272ANov 25, 1997
Carboxylate and heat-sensitive recording material using same
MITSUI TOATSU CHEMICALS5 citations61
US5559247ASep 24, 1996
Carboxylate and heat-sensitive recording material using same
MITSUI TOATSU CHEMICALS3 citations61
US5245049ASep 14, 1993
Crystals of fluoran compound, crystalline solvates thereof and process for their preparation
MITSUI TOATSU CHEMICALS0 citations52
US5231069AJul 27, 1993
Fluoran compound, heat sensitive recording materials comprising fluoran compound
MITSUI TOATSU CHEMICALS0 citations52
US5210221AMay 11, 1993
Crystal of fluoran compound and preparation process of the crystal
MITSUI TOATSU CHEMICALS0 citations52