Patents by Inventor Jhon Lehman Cuya HUAMAN

Jhon Lehman Cuya HUAMAN 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).

  • Patent number: 10391555
    Abstract: Silver nanowires having a thin and long shape that exhibit excellent dispersibility in an aqueous solvent having an alcohol added thereto are provided by silver nanowires having an average diameter of 50 nm or less and an average length of 10 ?m or more, covered with a copolymer of a maleimide-based monomer and vinylpyrrolidone. The silver nanowires can be produced by a method for producing silver nanowires, containing reductively depositing silver in a wire form in an alcohol solvent having dissolved therein a silver compound, the deposition being performed in the solvent having dissolved therein a copolymer of a maleimide-based monomer and vinylpyrrolidone.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: August 27, 2019
    Assignees: THE UNIVERSITY OF SHIGA PREFECTURE, DOWA HOLDINGS CO., LTD.
    Inventors: Shohei Ida, Yoshitsugu Hirokawa, Jeyadevan Balachandran, Jhon Lehman Cuya Huaman, Kimitaka Sato
  • Patent number: 10213838
    Abstract: A production method of silver nanowires exhibits a yield enhancement effect for a protective agent other than PVP. The method for producing silver nanowires includes depositing a silver linear structure, which is referred to as silver nanowires, in an alcohol solvent having a silver compound, a halogen compound, and an organic protective agent dissolved therein. A deposition reaction of silver is performed in a state where aluminum nitrate is further dissolved in the solvent, the total amount of aluminum nitrate dissolved in the solvent being from 0.01 to 0.50 in terms of Al/Ag molar ratio with respect to the total amount of the silver compound. The organic protective agent is, for example, one containing one or more kinds of alkylated PVP and a PVP-PVA graft copolymer.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: February 26, 2019
    Assignees: THE UNIVERSITY OF SHIGA PREFECTURE, DOWA HOLDINGS CO., LTD.
    Inventors: Jeyadevan Balachandran, Jhon Lehman Cuya Huaman, Daisuke Kodama
  • Publication number: 20180272424
    Abstract: Silver nanowires having a thin and long shape that exhibit excellent dispersibility in an aqueous solvent having an alcohol added thereto are provided by silver nanowires having an average diameter of 50 nm or less and an average length of 10 ?m or more, covered with a copolymer of a maleimide-based monomer and vinylpyrrolidone. The silver nanowires can be produced by a method for producing silver nanowires, containing reductively depositing silver in a wire form in an alcohol solvent having dissolved therein a silver compound, the deposition being performed in the solvent having dissolved therein a copolymer of a maleimide-based monomer and vinylpyrrolidone.
    Type: Application
    Filed: January 14, 2016
    Publication date: September 27, 2018
    Inventors: Shohei IDA, Yoshitsugu HIROKAWA, Jeyadevan BALACHANDRAN, Jhon Lehman Cuya HUAMAN, Kimitaka SATO
  • Publication number: 20170120327
    Abstract: Silver nanowires coated with, instead of a polymer protective agent such as PVP, an organic protective agent having a smaller molecular weight are provided. The silver nanowires have an average diameter of 100 nm or less and an average length of 5 ?m or more, and a thiol having a molecular weight of 75 to 300 is adhered on surfaces of the metal silver. The silver nanowires have a thiol containing one thiol group in the structure adhered thereon. A thiol having only one thiol group (—S—H) in a molecule is a suitable target. Examples thereof include 1-dodecanethiol, 1-decanethiol, 1-octanethiol, 3-mercapto-1,2-propanediol, monoethanolamine thioglycolate, ammonium thioglycolate, and thiomalic acid.
    Type: Application
    Filed: October 25, 2016
    Publication date: May 4, 2017
    Inventors: Jeyadevan BALACHANDRAN, Jhon Lehman Cuya HUAMAN, Takuya NAITO, Kimitaka SATO, Daisuke KODAMA
  • Publication number: 20160332234
    Abstract: A production method of silver nanowires exhibits a yield enhancement effect for a protective agent other than PVP. The method for producing silver nanowires includes depositing a silver linear structure, which is referred to as silver nanowires, in an alcohol solvent having a silver compound, a halogen compound, and an organic protective agent dissolved therein. A deposition reaction of silver is performed in a state where aluminum nitrate is further dissolved in the solvent, the total amount of aluminum nitrate dissolved in the solvent being from 0.01 to 0.50 in terms of Al/Ag molar ratio with respect to the total amount of the silver compound. The organic protective agent is, for example, one containing one or more kinds of alkylated PVP and a PVP-PVA graft copolymer.
    Type: Application
    Filed: January 19, 2015
    Publication date: November 17, 2016
    Inventors: Jeyadevan BALACHANDRAN, Jhon Lehman Cuya HUAMAN, Daisuke KODAMA