Patents by Inventor Rae Kyu Chang

Rae Kyu Chang 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).

  • Publication number: 20230371862
    Abstract: This disclosure relates to an apparatus for glucose-sensing that address interference of ascorbic acid and acetaminophen. The apparatus includes a first electrode capable of oxidizing glucose and at least one of ascorbic acid and acetaminophen. The apparatus further includes a second electrode capable of oxidizing at least one of ascorbic acid and acetaminophen but not capable of oxidizing glucose. The first electrode includes a deposit of irregularly shaped bodies that are formed of numerous nanoparticles having a generally oval or spherical shape with a length ranging between about 2 nm and about 5 nm.
    Type: Application
    Filed: August 2, 2023
    Publication date: November 23, 2023
    Inventors: Sejin Park, Rae Kyu Chang, Hankil Boo
  • Patent number: 11751781
    Abstract: This disclosure relates to a glucose-sensing electrode including a nanoporous layer on an electrically conductive surface. The nanoporous layer includes a three-dimensional interconnected network of irregularly shaped bodies that are formed of numerous nanoparticles having a generally oval or spherical shape with a length ranging between about 2 nm and about 5 nm. Inside the three-dimensional interconnected network of irregularly shaped bodies, at least part of the nanoparticles are adjacent to each other without an intervening nanoparticle therebetween and apart from each other to define interparticular nanopores therebetween, wherein at least part of the interparticular nanopores inside the three-dimensional interconnected network of irregularly shaped bodies are in a size ranging between about 0.5 nm and about 3 nm.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: September 12, 2023
    Assignee: UXN Co., Ltd.
    Inventors: Hankil Boo, Rae Kyu Chang
  • Patent number: 11744493
    Abstract: This disclosure relates to an apparatus for glucose-sensing that address interference of ascorbic acid and acetaminophen. The apparatus includes a first electrode capable of oxidizing glucose and at least one of ascorbic acid and acetaminophen. The apparatus further includes a second electrode capable of oxidizing at least one of ascorbic acid and acetaminophen but not capable of oxidizing glucose. The first electrode includes a deposit of irregularly shaped bodies that are formed of numerous nanoparticles having a generally oval or spherical shape with a length ranging between about 2 nm and about 5 nm. The deposit is substantially free of a surfactant. If any surfactant is contained in the deposit, the surfactant is in an amount smaller than 0.5 parts by weight with reference to 100 parts by weight of the deposit. The first electrode does not include a glucose-specific enzyme.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: September 5, 2023
    Assignee: UXN Co., Ltd.
    Inventors: Sejin Park, Rae Kyu Chang, Hankil Boo
  • Patent number: 11717199
    Abstract: This application features a method of forming a nanoporous layer. The method includes steps of dispensing on a substrate a colloid composition comprising a liquid and a number of nanoparticle clusters, and subjecting the dispensed colloid composition to drying to form the nanoporous layer over the substrate. The nanoporous layer includes nanoparticles deposited to form a three dimensional network of irregularly shaped bodies. The nanoporous layer also includes a three dimensional network of irregularly shaped spaces that are not occupied by the three dimensional network of irregularly shaped bodies.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: August 8, 2023
    Assignee: UXN Co., Ltd.
    Inventors: Hankil Boo, Rae Kyu Chang
  • Publication number: 20220183599
    Abstract: This disclosure relates to a glucose-sensing electrode including a nanoporous metal layer and an electrolyte ion-blocking layer formed over the nanoporous metal layer. The nanoporous metal layer is capable of oxidizing both glucose and maltose without an enzyme specific to glucose in the glucose-sensing electrode. The electrolyte ion-blocking layer is configured to inhibit Na+, K+, Ca2+, Cl?, PO43? and CO32? from diffusing toward the nanoporous metal layer such that there is a substantial discontinuity of a combined concentration of Na+, K+, Ca2+, Cl?, PO43? and CO32? between over and below the electrolyte ion-blocking layer.
    Type: Application
    Filed: March 1, 2022
    Publication date: June 16, 2022
    Inventors: Hankil BOO, Rae Kyu CHANG
  • Patent number: 11278224
    Abstract: This application features a method of forming a nanoporous layer. The method includes steps of reducing metal ions in a reverse micelle phase composition to form nanoparticles, removing surfactant from the composition to form clusters of the nanoparticles, dispensing the composition including the nanoparticle clusters dispersed in a liquid on a substrate, and drying to form the nanoporous layer. The nanoporous layer includes nanoparticles deposited to form a three dimensional network of irregularly shaped bodies. The nanoporous layer also includes a three dimensional network of intercluster spaces that are not occupied by the three dimensional network of irregularly shaped bodies.
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: March 22, 2022
    Assignee: UXN Co., Ltd.
    Inventors: Hankil Boo, Rae Kyu Chang
  • Publication number: 20220061721
    Abstract: This disclosure relates to a glucose-sensing electrode including a nanoporous metal layer and an electrolyte ion-blocking layer formed over the nanoporous metal layer. The nanoporous metal layer is capable of oxidizing both glucose and maltose without an enzyme specific to glucose in the glucose-sensing electrode. The electrolyte ion-blocking layer is configured to inhibit Na+, K+, Ca2+, Cl?, PO43? and CO32? from diffusing toward the nanoporous metal layer such that there is a substantial discontinuity of a combined concentration of Na+, K+, Ca2+, Cl?, PO43? and CO32? between over and below the electrolyte ion-blocking layer.
    Type: Application
    Filed: November 8, 2021
    Publication date: March 3, 2022
    Inventors: Hankil Boo, Rae Kyu Chang
  • Publication number: 20220031210
    Abstract: This disclosure relates to a glucose-sensing electrode including a nanoporous metal layer and a maltose-blocking layer formed over the nanoporous metal layer. The nanoporous metal layer is capable of oxidizing both glucose and maltose without an enzyme specific to glucose or maltose in the glucose-sensing electrode. The maltose-blocking layer has porosity that permits glucose to pass therethrough and inhibits maltose from passing therethrough toward the nanoporous metal layer.
    Type: Application
    Filed: October 4, 2021
    Publication date: February 3, 2022
    Inventors: Hankil Boo, Joungmin Lee, Rae Kyu Chang
  • Patent number: 11166655
    Abstract: This disclosure relates to a glucose-sensing electrode including a nanoporous metal layer and an electrolyte ion-blocking layer formed over the nanoporous metal layer. The nanoporous metal layer is capable of oxidizing both glucose and maltose without an enzyme specific to glucose in the glucose-sensing electrode. The electrolyte ion-blocking layer is configured to inhibit Na+, K+, Ca2+, Cl?, PO43? and CO32? from diffusing toward the nanoporous metal layer such that there is a substantial discontinuity of a combined concentration of Na+, K+, Ca2+, Cl?, PO43? and CO32? between over and below the electrolyte ion-blocking layer.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: November 9, 2021
    Assignee: UXN Co., Ltd.
    Inventors: Hankil Boo, Rae Kyu Chang
  • Patent number: 11134873
    Abstract: This disclosure relates to a glucose-sensing electrode including a nanoporous metal layer and a maltose-blocking layer formed over the nanoporous metal layer. The nanoporous metal layer is capable of oxidizing both glucose and maltose without an enzyme specific to glucose or maltose in the glucose-sensing electrode. The maltose-blocking layer has porosity that permits glucose to pass therethrough and inhibits maltose from passing therethrough toward the nanoporous metal layer.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: October 5, 2021
    Assignee: UXN Co. Ltd.
    Inventors: Hankil Boo, Joungmin Lee, Rae Kyu Chang
  • Publication number: 20200214609
    Abstract: This application features a method of forming a nanoporous layer. The method includes steps of reducing metal ions in a reverse micelle phase composition to form nanoparticles, removing surfactant from the composition to form clusters of the nanoparticles, dispensing the composition including the nanoparticle clusters dispersed in a liquid on a substrate, and drying to form the nanoporous layer. The nanoporous layer includes nanoparticles deposited to form a three dimensional network of irregularly shaped bodies. The nanoporous layer also includes a three dimensional network of intercluster spaces that are not occupied by the three dimensional network of irregularly shaped bodies.
    Type: Application
    Filed: March 4, 2020
    Publication date: July 9, 2020
    Inventors: Hankil BOO, Rae Kyu CHANG
  • Patent number: 10687746
    Abstract: This application features a method of forming a nanoporous layer. The method includes steps of reducing metal ions in a reverse micelle phase composition to form nanoparticles, removing surfactant from the composition to form clusters of the nanoparticles, dispensing the composition including the nanoparticle clusters dispersed in a liquid on a substrate, and drying to form the nanoporous layer. The nanoporous layer includes nanoparticles deposited to form a three dimensional network of irregularly shaped bodies. The nanoporous layer also includes a three dimensional network of intercluster spaces that are not occupied by the three dimensional network of irregularly shaped bodies.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: June 23, 2020
    Assignee: UXN CO., LTD.
    Inventors: Hankil Boo, Rae Kyu Chang
  • Publication number: 20190328297
    Abstract: This disclosure relates to a glucose-sensing electrode including a nanoporous layer on an electrically conductive surface. The nanoporous layer includes a three-dimensional interconnected network of irregularly shaped bodies that are formed of numerous nanoparticles having a generally oval or spherical shape with a length ranging between about 2 nm and about 5 nm. Inside the three-dimensional interconnected network of irregularly shaped bodies, at least part of the nanoparticles are adjacent to each other without an intervening nanoparticle therebetween and apart from each other to define interparticular nanopores therebetween, wherein at least part of the interparticular nanopores inside the three-dimensional interconnected network of irregularly shaped bodies are in a size ranging between about 0.5 nm and about 3 nm.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 31, 2019
    Inventors: Hankil Boo, Rae Kyu Chang
  • Publication number: 20190328296
    Abstract: This disclosure relates to an apparatus for glucose-sensing that address interference of ascorbic acid and acetaminophen. The apparatus includes a first electrode capable of oxidizing glucose and at least one of ascorbic acid and acetaminophen. The apparatus further includes a second electrode capable of oxidizing at least one of ascorbic acid and acetaminophen but not capable of oxidizing glucose. The first electrode includes a deposit of irregularly shaped bodies that are formed of numerous nanoparticles having a generally oval or spherical shape with a length ranging between about 2 nm and about 5 nm. The deposit is substantially free of a surfactant. If any surfactant is contained in the deposit, the surfactant is in an amount smaller than 0.5 parts by weight with reference to 100 parts by weight of the deposit. The first electrode does not include a glucose-specific enzyme.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 31, 2019
    Inventors: Sejin Park, Rae Kyu Chang, Hankil Boo
  • Patent number: 10327684
    Abstract: This disclosure relates to a nanoporous composition including a number of clusters of nanoparticles dispersed in a liquid, a nanoporous layer formed of the nanoporous composition, a glucose-oxidation electrode including the nanoporous layer, and a glucose-sensing device and system including the glucose-oxidation electrode. This disclosure also relates to a method of making the nanoporous composition, the nanoporous layer, the glucose-oxidation electrode and the glucose-sensing device and system. Further, this disclosure also relates to devices, systems and methods for continuous glucose monitoring (CGM) and blood glucose monitoring (BGM).
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: June 25, 2019
    Assignee: UXN Co., Ltd.
    Inventors: Sejin Park, Rae Kyu Chang, Hankil Boo
  • Patent number: 10330628
    Abstract: This disclosure relates to a nanoporous composition including a number of clusters of nanoparticles dispersed in a liquid, a nanoporous layer formed of the nanoporous composition, a glucose-oxidation electrode including the nanoporous layer, and a glucose-sensing device and system including the glucose-oxidation electrode. This disclosure also relates to a method of making the nanoporous composition, the nanoporous layer, the glucose-oxidation electrode and the glucose-sensing device and system. Further, this disclosure also relates to devices, systems and methods for continuous glucose monitoring (CGM) and blood glucose monitoring (BGM).
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: June 25, 2019
    Assignee: UXN Co., Ltd.
    Inventors: Hankil Boo, Rae Kyu Chang
  • Publication number: 20190153237
    Abstract: This application features a method of forming a nanoporous layer. The method includes steps of reducing metal ions in a reverse micelle phase composition to form nanoparticles, removing surfactant from the composition to form clusters of the nanoparticles, dispensing the composition including the nanoparticle clusters dispersed in a liquid on a substrate, and drying to form the nanoporous layer. The nanoporous layer includes nanoparticles deposited to form a three dimensional network of irregularly shaped bodies. The nanoporous layer also includes a three dimensional network of intercluster spaces that are not occoupied by the three dimensional network of irregularly shaped bodies.
    Type: Application
    Filed: August 7, 2018
    Publication date: May 23, 2019
    Inventors: Hankil BOO, Rae Kyu CHANG
  • Publication number: 20190150814
    Abstract: This disclosure relates to a glucose-sensing electrode including a nanoporous metal layer and an electrolyte ion-blocking layer formed over the nanoporous metal layer. The nanoporous metal layer is capable of oxidizing both glucose and maltose without an enzyme specific to glucose in the glucose-sensing electrode. The electrolyte ion-blocking layer is configured to inhibit Na+, K+, Ca2+, Cl?, PO43? and CO32? from diffusing toward the nanoporous metal layer such that there is a substantial discontinuity of a combined concentration of Na+, K+, Ca2+, Cl?, PO43? and CO32? between over and below the electrolyte ion-blocking layer.
    Type: Application
    Filed: November 19, 2018
    Publication date: May 23, 2019
    Inventors: Hankil Boo, Rae Kyu Chang
  • Publication number: 20190150812
    Abstract: This disclosure relates to a nanoporous composition including a number of clusters of nanoparticles dispersed in a liquid, a nanoporous layer formed of the nanoporous composition, a glucose-oxidation electrode including the nanoporous layer, and a glucose-sensing device and system including the glucose-oxidation electrode. This disclosure also relates to a method of making the nanoporous composition, the nanoporous layer, the glucose-oxidation electrode and the glucose-sensing device and system. Further, this disclosure also relates to devices, systems and methods for continuous glucose monitoring (CGM) and blood glucose monitoring (BGM).
    Type: Application
    Filed: December 18, 2017
    Publication date: May 23, 2019
    Applicant: UXN Co., Ltd.
    Inventors: Sejin Park, Rae Kyu Chang, Hankil Boo
  • Publication number: 20190154618
    Abstract: This disclosure relates to a nanoporous composition including a number of clusters of nanoparticles dispersed in a liquid, a nanoporous layer formed of the nanoporous composition, a glucose-oxidation electrode including the nanoporous layer, and a glucose-sensing device and system including the glucose-oxidation electrode. This disclosure also relates to a method of making the nanoporous composition, the nanoporous layer, the glucose-oxidation electrode and the glucose-sensing device and system. Further, this disclosure also relates to devices, systems and methods for continuous glucose monitoring (CGM) and blood glucose monitoring (BGM).
    Type: Application
    Filed: December 15, 2017
    Publication date: May 23, 2019
    Applicant: UXN Co., Ltd.
    Inventors: Hankil Boo, Rae Kyu Chang