Inventor · disambiguated record
Noboru Sayo
Also filed as: SAYO NOBORU
50 granted patents·3 pending applications·552 citations·filing 1987–2013
98Inventor score
Top patents by PatentIndex Score
53 records- 0194US4739084ARuthenium-phosphine complexTAKASAGO PERFUMERY CO LTD·Filed 1987·Granted Apr 19, 1988·45 cites·5 claims
- 0289US7964744B2Method for producing a ruthenium complexTAKASAGO PERFUMERY CO LTD·Filed 2009·Granted Jun 21, 2011·9 cites·4 claims
- 0389US4994590ARuthenium-phoshine complexTAKASAGO PERFUMERY CO LTD·Filed 1989·Granted Feb 19, 1991·27 cites·2 claims
- 0486US5206399A2,2'-bis(diphenylphosphino)-5,5',6,6',7,7',8,8'-octahydro-1,1'-binaphthyl and transition metal complex containing the same as ligandTAKASAGO PERFUMERY CO LTD·Filed 1991·Granted Apr 27, 1993·28 cites·6 claims
- 0586US4962230AProcess for producing optically active carboxylic acidTAKASAGO PERFUMERY CO LTD·Filed 1987·Granted Oct 9, 1990·25 cites·7 claims
- 0685US6333291B1Optically active diphosphine compound, production intermediate thereof, transition metal complex containing the compound as ligand and asymmetric hydrogenation catalyst containing the complexTAKASAGO PERFUMERY CO LTD·Filed 2000·Granted Dec 25, 2001·17 cites·7 claims
- 0784US4739085ARuthenium-phosphine complexTAKASAGO PERFUMERY CO LTD·Filed 1987·Granted Apr 19, 1988·22 cites·1 claims
- 0883US7754889B2Optically active transition metal-diamine compound and process for producing optically active alcohol with the sameTAKASAGO PERFUMERY CO LTD·Filed 2005·Granted Jul 13, 2010·5 cites·17 claims
- 0982US6342644B1Method for producing 1-mentholTAKASAGO PERFUMERY CO LTD·Filed 2001·Granted Jan 29, 2002·13 cites·11 claims
- 1082US5847222AOptically active diphosphine compound, method for making the compound, transition metal complex having the compound as ligand and method for making optically active substance by use of the complexTAKASAGO PERFUMERY CO LTD·Filed 1997·Granted Dec 8, 1998·22 cites·5 claims
- 1182US4994602AProcess for preparing optically active 6-t-butyoxy-3,5-dihydroxyhexanoic estersTAKASAGO PERFUMERY CO LTD·Filed 1990·Granted Feb 19, 1991·21 cites·10 claims
- 1282US4933482AProcess for preparing optically active alcoholTAKASAGO PERFUMERY CO LTD·Filed 1988·Granted Jun 12, 1990·18 cites·2 claims
- 1381US5530150APhosphine compound, complex containing the phosphine compound as ligand, process for producing optically active aldehyde using the phosphine compound or the complex, and 4-[(R)-1'-formylethyl]azetidin-2-one derivativesTAKASAGO PERFUMERY CO LTD·Filed 1994·Granted Jun 25, 1996·23 cites·11 claims
- 1481US4962242AProcess for producing optically active alcoholsTAKASAGO PERFUMERY CO LTD·Filed 1987·Granted Oct 9, 1990·17 cites·5 claims
- 1580US4766225ARuthenium-phosphine complexTAKASAGO PERFUMERY CO LTD·Filed 1987·Granted Aug 23, 1988·15 cites·5 claims
- 1679US5066815AProcess for preparing optically active alcoholTAKASAGO PERFUMERY CO LTD·Filed 1990·Granted Nov 19, 1991·20 cites·2 claims
- 1779US4954644ARuthenium-phosphine complexTAKASAGO PERFUMERY CO LTD·Filed 1988·Granted Sep 4, 1990·18 cites·5 claims
- 1879US4766227ARuthenium-phosphine complexTAKASAGO PERFUMERY CO LTD·Filed 1987·Granted Aug 23, 1988·14 cites·4 claims
- 1975US6492545B2Process for producing optically active alcoholTAKASAGO PERFUMERY CO LTD·Filed 2001·Granted Dec 10, 2002·12 cites·3 claims
- 2074US4916252AProcess for preparing optically active alcoholTAKASAGO PERFUMERY CO LTD·Filed 1988·Granted Apr 10, 1990·21 cites·3 claims
- 2172US5693868AMethod for producing optically active diphosphine compoundsTAKASAGO PERFUMERY CO LTD·Filed 1996·Granted Dec 2, 1997·18 cites·16 claims
- 2271US4981992AProcess for preparing optically active 3-hydroxybutanoic acidTAKASAGO PERFUMERY CO LTD·Filed 1989·Granted Jan 1, 1991·21 cites·3 claims
- 2365US5789609AOptically active diphosphine, transition metal complex containing the same, and process for producing optically active compound using the complexTAKASAGO PERFUMERY CO LTD·Filed 1997·Granted Aug 4, 1998·11 cites·4 claims
- 2464US4764629ARuthenium-phosphine complexTAKASAGO PERFUMERY CO LTD·Filed 1987·Granted Aug 16, 1988·7 cites·2 claims
- 2562US6465594B1Phosphine derivative and polymer thereof and transition metal complex comprising the sameTAKASAGO PERFUMERY CO LTD·Filed 2000·Granted Oct 15, 2002·3 cites·9 claims
- 2661US5502221AProcess for producing cyclohexylbutyric acid derivativeTAKASAGO PERFUMERY CO LTD·Filed 1995·Granted Mar 26, 1996·6 cites·1 claims
- 2760US5616751AOxotitanium complex, asymmetric hydrogenation catalyst comprising the complex, and process for producing β-hydroxy ketone or α-hydroxy carboxylic acid ester using the complexTAKASAGO PERFUMERY CO LTD·Filed 1995·Granted Apr 1, 1997·7 cites·5 claims
- 2859US6040465AProcess for producing optically active β-lactonesTAKASAGO PERFUMERY CO LTD·Filed 1999·Granted Mar 21, 2000·10 cites·2 claims
- 2956US6472539B1Production process of diphosphine oxide and diphosphonateTAKASAGO PERFUMERY CO LTD·Filed 2001·Granted Oct 29, 2002·2 cites·13 claims
- 3055US5286888ARuthenium-phosphine complex and process for producing optically active 1-substituted-1,3-propanediols using the same as a catalystTAKASAGO PERFUMERY CO LTD·Filed 1992·Granted Feb 15, 1994·4 cites·8 claims
- 3153US2013190502A1Acylation reaction of hydroxyl groupTAKASAGO PERFUMERY CO LTD·Filed 2013·Application pending·0 cites
- 3251US8431709B2Acylation reaction of hydroxyl groupMASHIMA KAZUSHI·Filed 2008·Granted Apr 30, 2013·0 cites·2 claims
- 3350US5420306AProcess for producing optically active γ-butyrolactone derivativesTAKASAGO PERFUMERY CO LTD·Filed 1991·Granted May 30, 1995·12 cites·6 claims
- 3449US7294601B2Phosphines, transition metal complexes containing the same as the ligand, and process for production of optically active carboxylic acidsTAKASAGO PERFUMERY CO LTD·Filed 2006·Granted Nov 13, 2007·0 cites·8 claims
- 3549US5563295AProcess for producing optically active carboxylic acidTAKASAGO PERFUMERY CO LTD·Filed 1995·Granted Oct 8, 1996·8 cites·5 claims
- 3649US4965398AProcess for producing optically active alpha-hydroxycarboxylatesTAKASAGO PERFUMERY CO LTD·Filed 1989·Granted Oct 23, 1990·3 cites·6 claims
- 3748US6596887B2Process for producing an optically active ruthenium-phosphine complex and process for producing an optically active alcohol by using the complexTAKASAGO PERFUMERY CO LTD·Filed 2001·Granted Jul 22, 2003·1 cites·1 claims
- 3848US5808162AChiral unsymmetric diphosphine compound and transition metal complex containing the same as ligandTAKASAGO PERFUMERY CO LTD·Filed 1996·Granted Sep 15, 1998·12 cites·2 claims
- 3948US5523458AProcess for producing optically active diaminohexanone derivativeTAKASAGO PERFUMERY CO LTD·Filed 1994·Granted Jun 4, 1996·3 cites·8 claims
- 4047US5922918AMethod for making an optically active diphosphine ligandTAKASAGO PERFUMERY CO LTD·Filed 1997·Granted Jul 13, 1999·9 cites·1 claims
- 4146US6313317B1Ruthenium-phosphine complex and method for producing the sameTAKASAGO PERFUMERY CO LTD·Filed 1999·Granted Nov 6, 2001·10 cites·2 claims
- 4244US5442105AProcess for producing cyclohexylbutyric acid derivativeTAKASAGO PERFUMERY CO LTD·Filed 1993·Granted Aug 15, 1995·2 cites·5 claims
- 4344US5198562ARuthenium-phosphine complex and intermediate for producing the sameTAKASAGO PERFUMERY CO LTD·Filed 1991·Granted Mar 30, 1993·3 cites·2 claims
- 4442US2006046286A1Method for preparing optically active beta-butyrolactonesWATANABE SHINYA·Filed 2005·Application pending·0 cites
- 4541US5434289AProcess for producing optically active β-hydroxyketoneTAKASAGO PERFUMERY CO LTD·Filed 1994·Granted Jul 18, 1995·2 cites·6 claims
- 4640US5324870AProcess for producing optically active 1-substituted-1,3-propanediols using ruthenium-phosphine complex as a catalystTAKASAGO PERFUMERY CO LTD·Filed 1993·Granted Jun 28, 1994·3 cites·1 claims
- 4740US2006211882A1Method for producing optically active carboxylic acidTAKASAGO PERFUMERY CO LTD·Filed 2004·Application pending·0 cites
- 4839US5919962AProcess for preparing ruthenium-phosphine complexTAKASAGO PERFUMERY CO LTD·Filed 1997·Granted Jul 6, 1999·2 cites·5 claims
- 4937US5631397AProcess for producing optically active diaminohexanone derivativeTAKASAGO PERFUMERY CO LTD·Filed 1995·Granted May 20, 1997·1 cites·10 claims
- 5030US5155240AProcess for producing optically active dihydropyran derivativeTAKASAGO PERFUMERY CO LTD·Filed 1991·Granted Oct 13, 1992·0 cites·3 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →