Inventor
IMAI RIHOKO
JP13 patents
⚠️ This page may combine multiple inventors who share the name “IMAI RIHOKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUI TOATSU CHEMICALS
12 patentsUS5751483AMay 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
US5318856AJun 7, 1994
Water-soluble azo dyes and polarizing films using the dyes
MITSUI TOATSU CHEMICALS38 citations92
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
US5423100AJun 13, 1995
Water-soluble azo compounds and polarizing films using the compounds
MITSUI TOATSU CHEMICALS7 citations74
US5639809AJun 17, 1997
Azo compounds and polarizing films using the compounds
MITSUI TOATSU CHEMICALS15 citations73
US5618868AApr 8, 1997
Polarizing film of a hydrophilic polymer film containing a novel azo compound
MITSUI TOATSU CHEMICALS3 citations63
US5698682ADec 16, 1997
Azo compounds and polarizing films using the compounds
MITSUI TOATSU CHEMICALS3 citations62
US5750599AMay 12, 1998
Quinophthalone compounds and polarizing films using same
MITSUI TOATSU CHEMICALS0 citations52
US5659039AAug 19, 1997
Quinophthalone compounds
MITSUI TOATSU CHEMICALS1 citations52