Inventor · disambiguated record
Hirokazu Narita
Also filed as: NARITA HIROKAZU
28 granted patents·1 pending application·346 citations·filing 1981–2018
97Inventor score
Files withTOYAMA CHEMICAL CO LTD23NARITA HIROKAZU2NAT INST OF ADVANCED IND SCIEN2AIST1HANDI PAC INC1
Top patents by PatentIndex Score
29 records- 0194US4704459AProcess for producing 1-substituted aryl-1,4-dihydro-4-oxonaphthyridine derivatives, and processes for producing the intermediatesTOYAMA CHEMICAL CO LTD·Filed 1986·Granted Nov 3, 1987·67 cites·13 claims
- 0288US4698352A4-oxo-1,4-dihydronicotinic acid derivatives, salts thereof, and antibacterial agents containing the sameTOYAMA CHEMICAL CO LTD·Filed 1983·Granted Oct 6, 1987·30 cites·13 claims
- 0388US4489072ACephalosporinsTOYAMA CHEMICAL CO LTD·Filed 1981·Granted Dec 18, 1984·18 cites·30 claims
- 0485US4851535ANicotinic acid derivativesTOYAMA CHEMICAL CO LTD·Filed 1987·Granted Jul 25, 1989·24 cites·8 claims
- 0583US5280032A1,2-ethanediol derivative and salt thereof, process for producing the same, and cerebral function-improving agent comprising the sameTOYAMA CHEMICAL CO LTD·Filed 1992·Granted Jan 18, 1994·16 cites·29 claims
- 0678US7597863B2Extractant for palladium and method for separation and recovery of palladiumNAT INST OF ADVANCED IND SCIEN·Filed 2005·Granted Oct 6, 2009·3 cites·8 claims
- 0777US5658904A1,2-ethanediol derivative and salt thereof and cerebral function-improving agent comprising the sameTOYAMA CHEMICAL CO LTD·Filed 1995·Granted Aug 19, 1997·13 cites·10 claims
- 0876US5719150A1,2-ethanediol derivative and salt thereof, process for producing the same, and cerebral function-improving agent comprising the sameTOYAMA CHEMICAL CO LTD·Filed 1996·Granted Feb 17, 1998·10 cites·3 claims
- 0976US5472984A1,2-ethanediol derivative and salt thereof and cerebral function-improving agent comprising the sameTOYAMA CHEMICAL CO LTD·Filed 1993·Granted Dec 5, 1995·10 cites·7 claims
- 1075US7918918B2Extractants for palladium and method of rapidly separating and recovering palladium using the sameNAT INST OF ADVANCED IND SCIEN·Filed 2009·Granted Apr 5, 2011·2 cites·4 claims
- 1175US5612381A1,2-ethanediol derivative and salt thereof process for producing the same, and cerebral function-improving agent comprising the sameTOYAMA CHEMICAL CO LTD·Filed 1995·Granted Mar 18, 1997·11 cites·11 claims
- 1269US8609898B2Separation reagent of platinum group metal, method for separating and recovering platinum group metal, and amide-containing tertiary amine compoundNARITA HIROKAZU·Filed 2011·Granted Dec 17, 2013·2 cites·10 claims
- 1368US4990508APyridone carboxylic acid derivatives and salts thereof, process for producing the same and antibacterial agents comprising the sameTOYAMA CHEMICAL CO LTD·Filed 1989·Granted Feb 5, 1991·18 cites·50 claims
- 1467US5872117A1,2-ethanediol derivative and salt thereof, process for producing the same, and cerebral function-improving agent comprising the sameTOYAMA CHEMICAL CO LTD·Filed 1997·Granted Feb 16, 1999·7 cites·7 claims
- 1567US5366989ATriazole derivatives and salts thereof and antifungal agent containing the sameTOYAMA CHEMICAL CO LTD·Filed 1992·Granted Nov 22, 1994·10 cites·21 claims
- 1666US5935952AQuinolone- or naphthylidone-carboxylic acid derivates or their saltsTOYAMA CHEMICAL CO LTD·Filed 1995·Granted Aug 10, 1999·26 cites·15 claims
- 1766US5144027ACephalosporins, process for producing the same, intermediates thereof and process for producing the intermediatesTOYAMA CHEMICAL CO LTD·Filed 1991·Granted Sep 1, 1992·8 cites·8 claims
- 1861US6034119AAgent for potentiating nerve growth factor activity containing 1,2-ethanediol derivative or salt thereofTOYAMA CHEMICAL CO LTD·Filed 1999·Granted Mar 7, 2000·11 cites·5 claims
- 1961US6025370AQuinolonecarboxylic acid derivatives or salts thereofTOYAMA CHEMICAL CO LTD·Filed 1997·Granted Feb 15, 2000·19 cites·21 claims
- 2061US5605921ATriazole derivatives and salts thereof, and antifungal agent containing the sameTOYAMA CHEMICAL CO LTD·Filed 1994·Granted Feb 25, 1997·7 cites·11 claims
- 2153US4673738ANovel intermediates of cephalosporins and process for producing 7-(substituted or unsubstituted amino)-3-substituted methyl-Δ3 -cephem-4-carboxylic acidsHANDI PAC INC·Filed 1984·Granted Jun 16, 1987·2 cites·5 claims
- 2252US11326228B2Method for separating rare earth elementAIST·Filed 2018·Granted May 10, 2022·0 cites·10 claims
- 2352US5236950AProcess for hair growthTOYAMA CHEMICAL CO LTD·Filed 1989·Granted Aug 17, 1993·19 cites·38 claims
- 2452US2010095807A1Separation reagent of platinum group metal, method for separating and recovering platinum group metal, and amide-containing tertiary amine compoundNARITA HIROKAZU·Filed 2009·Application pending·0 cites
- 2546US5807887AAgent for potentiating nerve growth factor activity containing 1,2-ethanediol derivative or salt thereofTOYAMA CHEMICAL CO LTD·Filed 1995·Granted Sep 15, 1998·4 cites·12 claims
- 2643US6103754AAgent for potentiating nerve growth factor activity containing 1,2-ethanediol derivative or salt thereofTOYAMA CHEMICAL CO LTD·Filed 1999·Granted Aug 15, 2000·3 cites·8 claims
- 2740US5968935AAgent for potentiating nerve growth factor activity containing 1,2-ethanediol derivative or salt thereofTOYAMA CHEMICAL CO LTD·Filed 1997·Granted Oct 19, 1999·2 cites·9 claims
- 2840US5932620AAgent for potentiating nerve growth factor activity containing 1,2-ethanediol derivative or salt thereofTOYAMA CHEMICAL CO LTD·Filed 1997·Granted Aug 3, 1999·2 cites·5 claims
- 2940US5922721AAgent for potentiating nerve growth factor activity containing 1,2-ethanediol derivative or salt thereofTOYAMA CHEMICAL CO LTD·Filed 1997·Granted Jul 13, 1999·2 cites·5 claims
Join the waitlist — get patent alerts
Get an alert when Hirokazu Narita files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →