Inventor
NAKATSUKA MASAKATSU
JP43 patents
⚠️ This page may combine multiple inventors who share the name “NAKATSUKA MASAKATSU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUI TOATSU CHEMICALS
35 patentsUS5059356AOct 22, 1991
Polarizing film
MITSUI TOATSU CHEMICALS67 citations95
US4824882AApr 25, 1989
Polarizing film
MITSUI TOATSU CHEMICALS78 citations95
US5286418AFeb 15, 1994
Polarizing film
MITSUI TOATSU CHEMICALS44 citations92
US5281570AJan 25, 1994
Thermochromic materials
MITSUI TOATSU CHEMICALS49 citations92
US4960538AOct 2, 1990
1,2-naphthalocyanine near-infrared absorbent and recording/display materials using same
MITSUI TOATSU CHEMICALS24 citations92
US5426170AJun 20, 1995
Method for preparing an aromatic polycarbonate
MITSUI TOATSU CHEMICALS24 citations91
US5196507AMar 23, 1993
Process for producing granules of polycarbonate and composition thereof
MITSUI TOATSU CHEMICALS18 citations82
US5072021ADec 10, 1991
Optically active naphthalene derivatives
MITSUI TOATSU CHEMICALS16 citations74
US4970021ANov 13, 1990
Phthalocyanine compounds and utility thereof
MITSUI TOATSU CHEMICALS9 citations74
US5359117AOct 25, 1994
Processes for producing aromatic polycarbonate oligomer and aromatic polycarbonate
MITSUI TOATSU CHEMICALS8 citations73
US5354513AOct 11, 1994
Polarizing film
MITSUI TOATSU CHEMICALS11 citations73
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
US5770108AJun 23, 1998
Pyrimidine compound and liquid crystal composition and liquid crystal element using the same
MITSUI TOATSU CHEMICALS13 citations72
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
US5324704AJun 28, 1994
Fluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparation
MITSUI TOATSU CHEMICALS2 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
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
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
US5380814AJan 10, 1995
Aromatic polycarbonate and process for production thereof
MITSUI TOATSU CHEMICALS4 citations61
US5346878ASep 13, 1994
Recording material
MITSUI TOATSU CHEMICALS3 citations61
US5476957ADec 19, 1995
Salicylic acid derivatives
MITSUI TOATSU CHEMICALS1 citations52
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
MITSUI CHEMICALS INC
5 patentsUS7166240B2Jan 23, 2007
Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elements
MITSUI CHEMICALS INC17 citations91
US6929870B2Aug 16, 2005
Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elements
MITSUI CHEMICALS INC33 citations91
US6383982B1May 7, 2002
Color developer composition, aqueous dispersion, recording sheet and color developing ink
MITSUI CHEMICALS INC17 citations82
US5861108AJan 19, 1999
Naphthalene compound, and liquid crystal composition and liquid crystal element using the same
MITSUI CHEMICALS INC7 citations72
US6217793B1Apr 17, 2001
Acetylene compound, liquid crystal composition and liquid crystal element
MITSUI CHEMICALS INC3 citations61