Inventor · disambiguated record
Usaji Takaki
Also filed as: TAKAKI USAJI
30 granted patents·349 citations·filing 1976–2003
97Inventor score
Top patents by PatentIndex Score
30 records- 0195US4081472AProcess for preparation of aromatic isocyanatesMITSUI TOATSU CHEMICALS·Filed 1976·Granted Mar 28, 1978·85 cites·7 claims
- 0287US6207794B1Polyoxyalkylene polyols, derivatives thereof, and process for producing the polyoxyalkylene polyolsMITSUI CHEMICALS INC·Filed 1998·Granted Mar 27, 2001·49 cites·24 claims
- 0381US5990352APhosphazenium salt and preparation process thereof, and process for producing poly(alkylene oxide)MITSUI CHEMICALS INC·Filed 1997·Granted Nov 23, 1999·21 cites·11 claims
- 0478US5179224APreparation process of cinnamate esterMITSUI TOATSU CHEMICALS·Filed 1991·Granted Jan 12, 1993·18 cites·10 claims
- 0576US4806683APreparation process of cinnamic acidsMITSUI TOATSU CHEMICALS·Filed 1987·Granted Feb 21, 1989·13 cites·4 claims
- 0675US6063825AFlexible polyurethane foam with high durabilityMITSUI CHEMICALS INC·Filed 1998·Granted May 16, 2000·29 cites·25 claims
- 0774US5952457APolymerization catalyst for alkylene oxide compound and production process of poly(alkylene oxide)MITSUI CHEMICALS INC·Filed 1996·Granted Sep 14, 1999·24 cites·2 claims
- 0868US6130346AProcess for preparing an organic compound from an oxirane-containing compound in the presence of a tris(triaminophosphoranylideneamino)phosphine oxideMITSUI CHEMICALS INC·Filed 1999·Granted Oct 10, 2000·11 cites·17 claims
- 0964US6255537B1Process for preparing poly(alkylene oxide)MITSUI CHEMICALS INC·Filed 1999·Granted Jul 3, 2001·17 cites·36 claims
- 1064US6153794APhosphine sulfide, a manufacturing process therefor and use thereofMITSUI CHEMICALS INC·Filed 1999·Granted Nov 28, 2000·9 cites·20 claims
- 1164US4966977AProcess for the preparation of indigo compoundsMITSUI TOATSU CHEMICALS·Filed 1989·Granted Oct 30, 1990·7 cites·16 claims
- 1263US5206430AMethod for obtaining high-purity cinnamic acidMITSUI TOATSU CHEMICALS·Filed 1991·Granted Apr 27, 1993·8 cites·4 claims
- 1362US6936684B2Poly (alkylene oxide) prepared in the presence of a phosphazenium salt or compoundMITSUI TOATSU CHEMICALS·Filed 2003·Granted Aug 30, 2005·2 cites·5 claims
- 1461US6528599B1Method for preparing living polymer in the presence of phosphazenium saltMITSUI CHEMICALS INC·Filed 2000·Granted Mar 4, 2003·5 cites·24 claims
- 1555US4661620APreparation process of cinnamate estersMITSUI TOATSU CHEMICALS·Filed 1985·Granted Apr 28, 1987·5 cites·28 claims
- 1654US4992556AProcess for the preparation of indigo compoundsMITSUI TOATSU CHEMICALS·Filed 1989·Granted Feb 12, 1991·5 cites·27 claims
- 1753US6077930APreparation process of polymerMITSUI CHEMICALS INC·Filed 1998·Granted Jun 20, 2000·11 cites·31 claims
- 1849US6297332B1Epoxy-resin composition and use thereofMITSUI CHEMICALS INC·Filed 1999·Granted Oct 2, 2001·9 cites·17 claims
- 1949US6090980APreparation process of iminotris ( Dimethylamino) phosphoraneMITSUI CHEMICALS INC·Filed 1998·Granted Jul 18, 2000·4 cites·19 claims
- 2044US6444847B2Process for preparing phosphine oxides and process for purifying the sameMITSUI CHEMICALS INC·Filed 2001·Granted Sep 3, 2002·0 cites·16 claims
- 2143US6303815B1Process for preparing phosphine oxides and process for purifying the sameMITSUI CHEMICALS INC·Filed 2000·Granted Oct 16, 2001·0 cites·12 claims
- 2243US6177593B1[Tris(dimethylamino)phosphonioamino]tris[tris(dimethylamino)phosphoranylideneamino]phosphonium dichloride and preparation process thereofMITSUI CHEMICALS INC·Filed 1998·Granted Jan 23, 2001·2 cites·22 claims
- 2342US4973706AProcess for the preparation of indigo compoundsMITSUI TOATSU CHEMICALS·Filed 1989·Granted Nov 27, 1990·2 cites·26 claims
- 2441US5112987AProcess for the preparation of indigo compoundsMITSUI TOATSU CHEMICALS·Filed 1989·Granted May 12, 1992·1 cites·28 claims
- 2539US4656306APreparation process of cinnamate esterMITSUI TOATSU CHEMICALS·Filed 1985·Granted Apr 7, 1987·2 cites·5 claims
- 2638US6022945AProcess for production of propylene oxide/ethylene oxide block copolymersMITSUI CHEMICALS INC·Filed 1999·Granted Feb 8, 2000·4 cites·1 claims
- 2735US5187283AProcess for the preparation of indigo compoundsMITSUI TOATSU CHEMICALS·Filed 1991·Granted Feb 16, 1993·1 cites·13 claims
- 2834US6664365B2Process for producing poly(alkylene oxide) in the presence of a phosphazenium salt or compoundFiled 1999·Granted Dec 16, 2003·0 cites·17 claims
- 2933US6310147B1Epoxy-resin composition and use thereofMITSUI CHEMICALS INC·Filed 1999·Granted Oct 30, 2001·3 cites·16 claims
- 3032US4908472APreparation process of cinnamate esterMITSUI TOATSU CHEMICALS·Filed 1988·Granted Mar 13, 1990·2 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →