Inventor · disambiguated record
Keigo Nishihira
Also filed as: NISHIHIRA KEIGO
35 granted patents·428 citations·filing 1977–1998
97Inventor score
Files withUBE INDUSTRIES35
Top patents by PatentIndex Score
35 records- 0196US4256908AProcess for preparing diesters of malonic acidUBE INDUSTRIES·Filed 1979·Granted Mar 17, 1981·56 cites·7 claims
- 0290US4229591AProcess for preparing a diester of oxalic acid in the gaseous phaseUBE INDUSTRIES·Filed 1978·Granted Oct 21, 1980·25 cites·3 claims
- 0387US5214185AContinuous process for preparing dimethyl carbonateUBE INDUSTRIES·Filed 1992·Granted May 25, 1993·33 cites·15 claims
- 0486US4461909AProcess for continuously preparing a diester of oxalic acidUBE INDUSTRIES·Filed 1983·Granted Jul 24, 1984·24 cites·18 claims
- 0585US5162563AProcess for preparing a diester of carboxylic acidUBE INDUSTRIES·Filed 1990·Granted Nov 10, 1992·26 cites·24 claims
- 0685US4229589AProcess for preparing a diester of oxalic acidUBE INDUSTRIES·Filed 1978·Granted Oct 21, 1980·17 cites·6 claims
- 0784US4260810AProcess for preparing diesters of dicarboxylic acidsUBE INDUSTRIES·Filed 1979·Granted Apr 7, 1981·17 cites·16 claims
- 0883US5292917AProcess for purifying dimethyl carbonateUBE INDUSTRIES·Filed 1993·Granted Mar 8, 1994·22 cites·4 claims
- 0983US4138587AProcess for the preparation of dialkyl oxalatesUBE INDUSTRIES·Filed 1977·Granted Feb 6, 1979·21 cites·12 claims
- 1082US4373107AProcess for preparing N-alkyl-alkylene-diaminesUBE INDUSTRIES·Filed 1981·Granted Feb 8, 1983·21 cites·13 claims
- 1180US4539403AProcess for the preparation of a 2-alkyl-4-amino-5-aminomethylpyrimidineUBE INDUSTRIES·Filed 1983·Granted Sep 3, 1985·13 cites·26 claims
- 1275US5869729AMethod of producing an ester compoundUBE INDUSTRIES·Filed 1996·Granted Feb 9, 1999·17 cites·15 claims
- 1375US4467109AProcess for continuous preparation of diester of oxalic acidUBE INDUSTRIES·Filed 1983·Granted Aug 21, 1984·13 cites·18 claims
- 1471US5514829AProcess for continuously producing dimethyl carbonateUBE INDUSTRIES·Filed 1994·Granted May 7, 1996·11 cites·16 claims
- 1570US5463109AProcess for preparing carbamatesUBE INDUSTRIES·Filed 1995·Granted Oct 31, 1995·11 cites·13 claims
- 1668US5834615AProcess for producing diaryl carbonateUBE INDUSTRIES·Filed 1997·Granted Nov 10, 1998·10 cites·9 claims
- 1768US5534648AProcess for continuously producing dimethyl carbonateUBE INDUSTRIES·Filed 1994·Granted Jul 9, 1996·10 cites·20 claims
- 1867US5811573AProcess for producing a diaryl carnonateUBE INDUSTRIES·Filed 1997·Granted Sep 22, 1998·9 cites·14 claims
- 1964US5648510AProcess for preparation of diaryl carbonateUBE INDUSTRIES·Filed 1996·Granted Jul 15, 1997·10 cites·16 claims
- 2064US4492792AProcess for preparing 4-amino-5-dialkoxy-methylpyrimidine derivativesUBE INDUSTRIES·Filed 1983·Granted Jan 8, 1985·5 cites·18 claims
- 2162US6191302B1Process for producing alkyl nitriteUBE INDUSTRIES·Filed 1998·Granted Feb 20, 2001·8 cites·9 claims
- 2260US5631396AProcess for continuously producing dimethyl carbonateUBE INDUSTRIES·Filed 1996·Granted May 20, 1997·8 cites·13 claims
- 2359US5731453AProcess for producing a diaryl carbonateUBE INDUSTRIES·Filed 1997·Granted Mar 24, 1998·6 cites·30 claims
- 2459US5380906AProcess for preparing carbonic diesterUBE INDUSTRIES·Filed 1993·Granted Jan 10, 1995·7 cites·19 claims
- 2558US5892091ACatalyst for decarbonylation reactionUBE INDUSTRIES·Filed 1997·Granted Apr 6, 1999·7 cites·12 claims
- 2657US6018072AProcess for producing a diaryl oxalateUBE INDUSTRIES·Filed 1996·Granted Jan 25, 2000·6 cites·10 claims
- 2744US4892948A2-methyl-4-amino-5-aminomethylpyrimidine carbonate, process for preparing the same and method of purification of 2-methyl-4-amino-5-aminomethylpyrimidine using the sameUBE INDUSTRIES·Filed 1988·Granted Jan 9, 1990·1 cites·1 claims
- 2843US5922827AProcess for producing a polycarbonateUBE INDUSTRIES·Filed 1997·Granted Jul 13, 1999·7 cites·21 claims
- 2943US5315032AMethod of producing an N-hydroxycarbamate compoundUBE INDUSTRIES·Filed 1993·Granted May 24, 1994·2 cites·11 claims
- 3043US5037982AMethod of purifying 2-methyl-4-amino-5-aminomethylpyrimidineUBE INDUSTRIES·Filed 1989·Granted Aug 6, 1991·1 cites·13 claims
- 3141US5705677ADiphenyl oxalate-phenol adduct, process for producing the adduct and method of producing diphenyl oxalate from the adductUBE INDUSTRIES·Filed 1996·Granted Jan 6, 1998·2 cites·7 claims
- 3238US5276200AMethod of preparing sodium formyl acetone and 4,4-dimethoxy-2-butanoneUBE INDUSTRIES·Filed 1992·Granted Jan 4, 1994·1 cites·15 claims
- 3335US4421925A4-Alkoxy-1,3-dioxane-5-carbonitriles and process for preparing the sameUBE INDUSTRIES·Filed 1982·Granted Dec 20, 1983·0 cites·11 claims
- 3432US4978766AProcess for producing 2-hydroxymethylene-3,3-dialkoxypropanenitrile alkali metal salt and process for obtaining alcoholic slurry of said compound from its synthetic reaction mixtureUBE INDUSTRIES·Filed 1989·Granted Dec 18, 1990·1 cites·9 claims
- 3530US5892089AProcess for preparing diaryl carbonateUBE INDUSTRIES·Filed 1997·Granted Apr 6, 1999·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →