Inventor
TAKAKI USAJI
JP30 patents
⚠️ This page may combine multiple inventors who share the name “TAKAKI USAJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUI CHEMICALS INC
16 patentsUS6207794B1Mar 27, 2001
Polyoxyalkylene polyols, derivatives thereof, and process for producing the polyoxyalkylene polyols
MITSUI CHEMICALS INC49 citations92
US6063825AMay 16, 2000
Flexible polyurethane foam with high durability
MITSUI CHEMICALS INC29 citations92
US5990352ANov 23, 1999
Phosphazenium salt and preparation process thereof, and process for producing poly(alkylene oxide)
MITSUI CHEMICALS INC21 citations92
US5952457ASep 14, 1999
Polymerization catalyst for alkylene oxide compound and production process of poly(alkylene oxide)
MITSUI CHEMICALS INC24 citations92
US6255537B1Jul 3, 2001
Process for preparing poly(alkylene oxide)
MITSUI CHEMICALS INC17 citations83
US6297332B1Oct 2, 2001
Epoxy-resin composition and use thereof
MITSUI CHEMICALS INC9 citations74
US6153794ANov 28, 2000
Phosphine sulfide, a manufacturing process therefor and use thereof
MITSUI CHEMICALS INC9 citations73
US6130346AOct 10, 2000
Process for preparing an organic compound from an oxirane-containing compound in the presence of a tris(triaminophosphoranylideneamino)phosphine oxide
MITSUI CHEMICALS INC11 citations73
US6077930AJun 20, 2000
Preparation process of polymer
MITSUI CHEMICALS INC11 citations73
US6528599B1Mar 4, 2003
Method for preparing living polymer in the presence of phosphazenium salt
MITSUI CHEMICALS INC5 citations62
US6177593B1Jan 23, 2001
[Tris(dimethylamino)phosphonioamino]tris[tris(dimethylamino)phosphoranylideneamino]phosphonium dichloride and preparation process thereof
MITSUI CHEMICALS INC2 citations62
US6090980AJul 18, 2000
Preparation process of iminotris ( Dimethylamino) phosphorane
MITSUI CHEMICALS INC4 citations62
US6022945AFeb 8, 2000
Process for production of propylene oxide/ethylene oxide block copolymers
MITSUI CHEMICALS INC4 citations62
US6310147B1Oct 30, 2001
Epoxy-resin composition and use thereof
MITSUI CHEMICALS INC3 citations60
US6444847B2Sep 3, 2002
Process for preparing phosphine oxides and process for purifying the same
MITSUI CHEMICALS INC0 citations51
US6303815B1Oct 16, 2001
Process for preparing phosphine oxides and process for purifying the same
MITSUI CHEMICALS INC0 citations51
MITSUI TOATSU CHEMICALS
13 patentsUS4081472AMar 28, 1978
Process for preparation of aromatic isocyanates
MITSUI TOATSU CHEMICALS85 citations93
US4966977AOct 30, 1990
Process for the preparation of indigo compounds
MITSUI TOATSU CHEMICALS7 citations74
US5206430AApr 27, 1993
Method for obtaining high-purity cinnamic acid
MITSUI TOATSU CHEMICALS8 citations72
US5179224AJan 12, 1993
Preparation process of cinnamate ester
MITSUI TOATSU CHEMICALS18 citations72
US4806683AFeb 21, 1989
Preparation process of cinnamic acids
MITSUI TOATSU CHEMICALS13 citations72
US6936684B2Aug 30, 2005
Poly (alkylene oxide) prepared in the presence of a phosphazenium salt or compound
MITSUI TOATSU CHEMICALS2 citations63
US4973706ANov 27, 1990
Process for the preparation of indigo compounds
MITSUI TOATSU CHEMICALS2 citations63
US4908472AMar 13, 1990
Preparation process of cinnamate ester
MITSUI TOATSU CHEMICALS2 citations63
US4992556AFeb 12, 1991
Process for the preparation of indigo compounds
MITSUI TOATSU CHEMICALS5 citations60
US4661620AApr 28, 1987
Preparation process of cinnamate esters
MITSUI TOATSU CHEMICALS5 citations60
US4656306AApr 7, 1987
Preparation process of cinnamate ester
MITSUI TOATSU CHEMICALS2 citations60
US5187283AFeb 16, 1993
Process for the preparation of indigo compounds
MITSUI TOATSU CHEMICALS1 citations52
US5112987AMay 12, 1992
Process for the preparation of indigo compounds
MITSUI TOATSU CHEMICALS1 citations52