Patents by Inventor Nakyen Choy

Nakyen Choy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of 4-alkoxy-3-hydroxypicolinic acids
    Patent number: 9951018
    Abstract: 4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 2-hydroxypicolinonitrile in a series of chemical steps selected from chlorination, chloro substitution, nitrile hydrolysis and chloro reduction.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: April 24, 2018
    Assignee: Dow AgroSciences LLC
    Inventors: Patrick S. Hanley, Nakyen Choy, Thomas L. Siddall, Gregory T. Whiteker
  • PROCESS FOR THE PREPARATION OF (1R,3R)- AND (1S,3S)-2,2-DIHALO-3-(SUBSTITUTED PHENYL)CYCLOPROPANECARBOXYLIC ACIDS
    Publication number: 20180099919
    Abstract: The (1R,3R)- or (1S,3S)-enantiomer of 2,2-dichloro-3-(substituted phenyl)cyclopropane-carboxylic acid is prepared in a process involving chemical resolution of a racemic mixture of a trans-2,2-dichloro-3-(substituted phenyl)cyclopropanecarboxylic acid with an enantiomeric amine, isolation of a diastereomeric amine salt and finally treatment of the salt with an acid.
    Type: Application
    Filed: October 9, 2017
    Publication date: April 12, 2018
    Applicant: Dow AgroSciences LLC
    Inventors: Nakyen Choy, Fangzheng Li
  • 5-FLUORO-4-IMINO-3-(ALKYL/SUBSTITUTED ALKYL)-1-(ARYLSULFONYL)-3,4-DIHYDROPYRIMIDIN-2(1H)-ONE AND PROCESSES FOR THEIR PREPARATION
    Publication number: 20180072686
    Abstract: Provided herein are 5-fluoro-4-imino-3-(alkyl/substituted alkyl)-1-(arylsulfonyl-3,4-dihyropyrimidin-2(1H)-one and processes for their preparation which may include the use of an alkali carbonate and an alkylating agent
    Type: Application
    Filed: November 15, 2017
    Publication date: March 15, 2018
    Applicant: Adama Makhteshim Ltd.
    Inventors: Nakyen Choy, Ronald Ross, JR.
  • PROCESSES FOR THE PREPARATION OF 4-ALKOXY-3-(ACYL OR ALKYL)OXYPICOLINAMDES
    Publication number: 20180009756
    Abstract: A fungicidal 4-methoxy-3-acetyloxypicolinamide may be conveniently prepared in processes that include the coupling together of 4-methoxy-3-acetyloxypicolinic acid or 4-methoxy-3-hydroxypicolinic acid with a key 2-aminopropanoate ester derived from a 1,1-bis(4-fluorophenyl)propane-1,2-diol.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 11, 2018
    Applicant: Dow AgroSciences LLC
    Inventors: Gregory T. Whiteker, Nakyen Choy, Peter Borromeo, Nicholas R. Babij
  • Molecules having pesticidal utility, and intermediates, compositions, and processes, related thereto
    Publication number: 20180007911
    Abstract: This disclosure relates to the field of molecules having pesticidal utility against pests in Phyla Arthropoda, Mollusca, and Nematoda, processes to produce such molecules, intermediates used in such processes, pesticidal compositions containing such molecules, and processes of using such pesticidal compositions against such pests. These pesticidal compositions may be used, for example, as acaricides, insecticides, miticides, molluscicides, and nematicides. This document discloses molecules having the following formula (“Formula One”).
    Type: Application
    Filed: September 15, 2017
    Publication date: January 11, 2018
    Applicant: Dow AgroSciences LLC
    Inventors: Timothy P. Martin, Joseph D. Eckelbarger, Ronald Ross, JR., Kyle A. DeKorver, Ronald J. Heemstra, Daniel I. Knueppel, Peter Vednor, Ricky Hunter, David A. Demeter, Tony K. Trullinger, Erich W. Baum, Zoltan L. Benko, Nakyen Choy, Gary D. Crouse, John F. Daeuble, SR., Fangzheng Li, Jeffrey Nissen, Michelle Riener, Thomas C. Sparks, Frank J. Wessels, Maurice C. Yap
  • PROCESSES FOR THE PREPARATION OF 4-ALKOXY-3-(ACYL OR ALKYL)OXYPICOLINAMDES
    Publication number: 20180009755
    Abstract: A fungicidal 4-methoxy-3-acetyloxypicolinamide may be conveniently prepared in processes that include the coupling together of 4-methoxy-3-acetyloxypicolinic acid or 4-methoxy-3-hydroxypicolinic acid with a key 2-aminopropanoate ester derived from a 1,1-bis(4-fluorophenyl)propane-1,2-diol.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 11, 2018
    Applicant: Dow AgroSciences LLC
    Inventors: Gregory T. Whiteker, Nakyen Choy, Peter Borromeo, Nicholas R. Babij, Gary Roth, Patrick S. Hanley, Matthias S. Ober, Tina Staton, Daniel I. Knueppel, Grant Von Wald, Nicole Hough
  • Molecules having pesticidal utility, and intermediates, compositions, and processes, related thereto
    Publication number: 20180000087
    Abstract: This disclosure relates to the field of molecules having pesticidal utility against pests in Phyla Arthropoda, Mollusca, and Nematoda, processes to produce such molecules, intermediates used in such processes, pesticidal compositions containing such molecules, and processes of using such pesticidal compositions against such pests. These pesticidal compositions may be used, for example, as acaricides, insecticides, miticides, molluscicides, and nematicides. This document discloses molecules having the following formula (“Formula One”).
    Type: Application
    Filed: September 15, 2017
    Publication date: January 4, 2018
    Applicant: Dow AgroSciences LLC
    Inventors: Joseph D. Eckelbarger, Daniel I. Knueppel, Ronald J. Heemstra, Ronald Ross, JR., Kyle A. DeKorver, Kaitlyn Gray, Peter Vednor, Timothy P. Martin, Ricky Hunter, David A. Demeter, Tony K. Trullinger, Erich W. Baum, Zoltan L. Benko, Nakyen Choy, Gary D. Crouse, John F. Daeuble, SR., Fangzheng Li, Jeffrey Nissen, Michelle Riener, Thomas C. Sparks, Frank J. Wessels, Maurice C. Yap
  • 5-fluoro-4-imino-3-(alkyl/substituted alkyl)-1-(arylsulfonyl)-3,4-dihydropyrimidin-2(1 H)-one and processes for their preparation
    Patent number: 9850215
    Abstract: Provided herein are 5-fluoro-4-imino-3-(alkyl/substituted alkyl)-1-(arylsulfonyl)-3,4-dihydropyrimidin-2(1H)-one and processes for their preparation which may include the use of an alkali carbonate and an alkylating agent
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: December 26, 2017
    Assignee: ADAMA MAKHTESHIM LTD.
    Inventors: Nakyen Choy, Ronald Ross, Jr.
  • 5-fluoro-4-imino-3-(alkyl/substituted alkyl)-1-(arylsulfonyl)-3,4-dihydropyrimidin-2(1H)-one and processes for their preparation
    Patent number: 9840476
    Abstract: Provided herein are 5-fluoro-4-imino-3-(alkyl/substituted alkyl)-1-(arylsulfonyl)3,4-dihydropyrimidin-2(1H)-one and processes for their preparation which may include the use of an alkali alkoxide and an alkylating agent
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: December 12, 2017
    Assignee: ADAMA MAKTESHIM LTD.
    Inventors: Nakyen Choy, Ronald Ross, Jr.
  • Molecules having pesticidal utility, and intermediates, compositions, and processes, related thereto
    Publication number: 20170339961
    Abstract: This disclosure relates to the field of molecules having pesticidal utility against pests in Phyla Arthropoda, Mollusca, and Nematoda, processes to produce such molecules, intermediates used in such processes, pesticidal compositions containing such molecules, and processes of using such pesticidal compositions against such pests. These pesticidal compositions may be used, for example, as acaricides, insecticides, miticides, molluscicides, and nematicides. This document discloses molecules having the following formula (“Formula One”).
    Type: Application
    Filed: August 17, 2017
    Publication date: November 30, 2017
    Applicant: Dow AgroSciences LLC
    Inventors: Ronald J. Heemstra, Ronald Ross, JR., Kyle A. DeKorver, Kaitlyn Gray, Daniel I. Knueppel, Peter Vednor, Timothy P. Martin, Joseph D. Eckelbarger, John F. Daeuble, SR., Ricky Hunter, David A. Demeter, Tony K. Trullinger, Erich W. Baum, Zoltan L. Benko, Nakyen Choy, Gary D. Crouse, Fangzheng Li, Jeffrey Nissen, Monica B. Olson, Michelle Riener, Thomas C. Sparks, Frank J. Wessels, Maurice C. Yap
  • Molecules having pesticidal utility, and intermediates, compositions, and processes, related thereto
    Patent number: 9795139
    Abstract: This disclosure relates to the field of molecules having pesticidal utility against pests in Phyla Arthropoda, Mollusca, and Nematoda, processes to produce such molecules, intermediates used in such processes, pesticidal compositions containing such molecules, and processes of using such pesticidal compositions against such pests. These pesticidal compositions may be used, for example, as acaricides, insecticides, miticides, molluscicides, and nematicides. This document discloses molecules having the following formula (“Formula One”).
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: October 24, 2017
    Assignee: Dow AgroSciences LLC
    Inventors: Joseph D. Eckelbarger, Daniel I. Knueppel, Ronald J. Heemstra, Ronald Ross, Jr., Kyle A. Dekorver, Kaitlyn Gray, Peter Vednor, Timothy P. Martin, Ricky Hunter, David A. Demeter, Tony K. Trullinger, Erich Baum, Zoltan L. Benko, Nakyen Choy, Gary Crouse, John F. Daeuble, Sr., Fangzheng Li, Jeff Nissen, Michelle Riener, Tom Sparks, Frank Wessels, Maurice Yap
  • Molecules having pesticidal utility, and intermediates, compositions, and processes, related thereto
    Patent number: 9795140
    Abstract: This disclosure relates to the field of molecules having pesticidal utility against pests in Phyla Arthropoda, Mollusca, and Nematoda, processes to produce such molecules, intermediates used in such processes, pesticidal compositions containing such molecules, and processes of using such pesticidal compositions against such pests. These pesticidal compositions may be used, for example, as acaricides, insecticides, miticides, molluscicides, and nematicides. This document discloses molecules having the following formula (“Formula One”).
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: October 24, 2017
    Assignee: Dow AgroSciences LLC
    Inventors: Timothy P. Martin, Joseph D. Eckelbarger, Ronald Ross, Jr., Kyle DeKorver, Ronald J. Heemstra, Daniel I. Knueppel, Peter Vednor, Ricky Hunter, David A. Demeter, Tony K. Trullinger, Erich Baum, Zoltan Benko, Nakyen Choy, Gary Crouse, John F. Daeuble, Sr., Fangzheng Li, Jeff Nissen, Michelle Riener, Tom Sparks, Frank Wessels, Maurice Yap
  • Molecules having pesticidal utility, and intermediates, compositions, and processes, related thereto
    Patent number: 9781935
    Abstract: This disclosure relates to the field of molecules having pesticidal utility against pests in Phyla Arthropoda, Mollusca, and Nematoda, processes to produce such molecules, intermediates used in such processes, pesticidal compositions containing such molecules, and processes of using such pesticidal compositions against such pests. These pesticidal compositions may be used, for example, as acaricides, insecticides, miticides, molluscicides, and nematicides. This document discloses molecules having the following formula (“Formula One”).
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: October 10, 2017
    Assignee: Dow AgroSciences LLC
    Inventors: Ronald J. Heemstra, Ronald Ross, Jr., Kyle DeKorver, Kaitlyn Gray, Daniel I. Knueppel, Peter Vednor, Timothy P. Martin, Joseph D. Eckelbarger, John F. Daeuble, Sr., Ricky Hunter, David A. Demeter, Tony K. Trullinger, Erich Baum, Zoltan L. Benko, Nakyen Choy, Gary Crouse, Fangzheng Li, Jeff Nissen, Monica B. Olson, Michelle Riener, Thomas C. Sparks, Frank J. Wessels, Maurice C. Yap
  • PROCESS FOR THE PREPARATION OF 4-ALKOXY-3-HYDROXYPICOLINIC ACIDS
    Publication number: 20170247330
    Abstract: 4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 2-hydroxypicolinonitrile in a series of chemical steps selected from chlorination, chloro substitution, nitrile hydrolysis and chloro reduction.
    Type: Application
    Filed: February 27, 2017
    Publication date: August 31, 2017
    Applicant: Dow AgroSciences LLC
    Inventors: Patrick S. Hanley, Nakyen Choy, Thomas L. Siddall, Gregory T. Whiteker
  • Process for the preparation of 4-alkoxy-3-hydroxypicolinic acids
    Patent number: 9718783
    Abstract: 4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement. 4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 4,6-dibromo-3-hydroxypicolinonitrile in a series of chemical steps selected from bromo substitution, nitrile hydrolysis and halogen reduction.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: August 1, 2017
    Assignee: Dow AgroSciences LLC
    Inventors: James M. Renga, Yuanming Zhu, Gregory T. Whiteker, Nakyen Choy, Kenneth E. Stockman
  • 2-(2,4-DIFLUOROPHENYL)-1,1-DIFLUORO-1-(5-SUBSTITUTED-PYRIDIN-2-YL)-3-(1H-TETRAZOL-1-YL)PROPAN-2-OLS AND PROCESSES FOR THEIR PREPARATION
    Publication number: 20170158667
    Abstract: Provided herein are 2-(2,4-difluorophenyl)-1,1-difluoro-1-(5-substituted-pyridin-2-yl)-3-(1H-tetrazol-1-yl)propan-2-ols and 1-(2,4-difluorophenyl)-2,2-difluoro-2-(5-substituted-pyridin-2-yl)ethanones and processes for their preparation.
    Type: Application
    Filed: March 19, 2015
    Publication date: June 8, 2017
    Inventors: William J. Hoekstra, Nakyen Choy, Carl DeAmicis, Daniel Knueppel, Jim Renga, Michael T. Sullenberger, Gregory Whiteker, Yuanming Zhu, Gary D. Gustafson
  • PROCESS FOR THE PREPARATION OF 4-ALKOXY-3-HYDROXYPICOLINIC ACIDS
    Publication number: 20170044105
    Abstract: 4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement. 4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 4,6-dibromo-3-hydroxypicolinonitrile in a series of chemical steps selected from bromo substitution, nitrile hydrolysis and halogen reduction.
    Type: Application
    Filed: October 31, 2016
    Publication date: February 16, 2017
    Inventors: James M. Renga, Yuanming Zhu, Gregory T. Whiteker, Nakyen Choy, Kenneth E. Stockman
  • Process for the preparation of dibromohydroxypicolinonitrile
    Patent number: 9522887
    Abstract: 4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: December 20, 2016
    Assignee: Dow AgroSciences LLC
    Inventors: James M. Renga, Yuanming Zhu, Gregory T. Whiteker, Nakyen Choy
  • Process for the preparation of 4-alkoxy-3-hydroxypicolinic acids
    Patent number: 9481651
    Abstract: 4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement. 4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 4,6-dibromo-3-hydroxypicolinonitrile in a series of chemical steps selected from bromo substitution, nitrile hydrolysis and halogen reduction.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: November 1, 2016
    Assignee: Dow AgroSciences LLC
    Inventors: James M. Renga, Yuanming Zhu, Gregory T. Whiteker, Nakyen Choy, Kenneth E. Stockman
  • Process for the preparation of 4-alkoxy-3-hydroxypicolinic acids
    Patent number: 9475771
    Abstract: 4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement. 4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 4,6-dibromo-3-hydroxypicolinonitrile in a series of chemical steps selected from bromo substitution, nitrile hydrolysis and halogen reduction.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: October 25, 2016
    Assignee: Dow AgroSciences LLC
    Inventors: James M. Renga, Yuanming Zhu, Gregory T. Whiteker, Nakyen Choy