Inventor · disambiguated record
Keiji Maruoka
Also filed as: MARUOKA KEIJI
14 granted patents·2 pending applications·36 citations·filing 1988–2012
88Inventor score
Top patents by PatentIndex Score
16 records- 0185US6340753B1Optically active quarternary ammonium salt with axial chirality, method for producing thereof, and application thereof for asymmetric synthesis of α-amino acidNAGASE & CO LTD·Filed 2000·Granted Jan 22, 2002·19 cites·8 claims
- 0283US7928224B2Optically active quaternary ammonium salt having axial asymmetry and process for producing α-amino acid and derivative thereof with the sameNAGASE & CO LTD·Filed 2005·Granted Apr 19, 2011·4 cites·16 claims
- 0377US8367820B2Optically active ammonium salt compound, production intermediate thereof, and production method thereofNIPPON SODA CO·Filed 2006·Granted Feb 5, 2013·1 cites·6 claims
- 0475US8962898B2Optically active ammonium salt compound, production intermediate thereof, and production method thereofNIPPON SODA CO·Filed 2012·Granted Feb 24, 2015·1 cites·2 claims
- 0574US6441231B1Optically active quarternary ammonium salt with axial chirality, method for producing thereof, and application thereof for asymmetric synthesis of α-amino acidNAGASE & CO LTD·Filed 2001·Granted Aug 27, 2002·7 cites·4 claims
- 0672US8110680B2Optically active quaternary ammonium salt having axial asymmetry, and method for producing alpha-amino acid and derivative thereof by using the sameMARUOKA KEIJI·Filed 2007·Granted Feb 7, 2012·3 cites·4 claims
- 0760US8697910B2Optically active quaternary ammonium salt having axial asymmetry and process for producing α-amino acid and derivative thereof with the sameMARUOKA KEIJI·Filed 2007·Granted Apr 15, 2014·0 cites·16 claims
- 0859US2012095218A1Optically active quaternary ammonium salt having axial asymmetry, and method for producing alpha-amino acid and derivative thereof by using the sameMARUOKA KEIJI·Filed 2011·Application pending·0 cites
- 0957US8263798B2Optically active quaternary ammonium salt having axial asymmetry, and method for producing alpha-amino acid and derivative thereof by using the sameMARUOKA KEIJI·Filed 2011·Granted Sep 11, 2012·0 cites·26 claims
- 1057US8252952B2Optically active quaternary ammonium salt having axial asymmetry, and method for producing alpha-amino acid and derivative thereof by using the sameMARUOKA KEIJI·Filed 2011·Granted Aug 28, 2012·0 cites·13 claims
- 1154US8716524B2Optically active quaternary ammonium salt having axial asymmetry and process for producing a-amino acid and derivative thereof with the sameMARUOKA KEIJI·Filed 2011·Granted May 6, 2014·0 cites·9 claims
- 1253US7566779B2Optically active quaternary ammonium salt, process for producing the same, and process for producing optically active α-amino acid derivative with the sameTOSOH CORP·Filed 2004·Granted Jul 28, 2009·1 cites·12 claims
- 1344US8722919B2Process for production of mono-substituted alkylated compound using aldimine or derivative thereofMARUOKA KEIJI·Filed 2006·Granted May 13, 2014·0 cites·10 claims
- 1440US8614316B2Optically active quaternary ammonium salt having axial asymmetry and process for producing α-amino acid and derivative thereof with the sameMARUOKA KEIJI·Filed 2006·Granted Dec 24, 2013·0 cites·12 claims
- 1540US2006069134A1Process for producing optically active alpha-substituted cysteine or salt thereof, intermediate therefor, and process for producing the sameKANEKA CORP·Filed 2003·Application pending·0 cites
- 1632US4798903AOptically active 3,3'-disilylbinaphthol derivativesTOYO STAUFFER CHEM CO·Filed 1988·Granted Jan 17, 1989·0 cites·5 claims
Join the waitlist — get patent alerts
Get an alert when Keiji Maruoka 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 →