Patents by Inventor Hwisu Oh

Hwisu Oh 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).

  • Method for separating and collecting single aggregate from fumed silica and method for classifying shape of single aggregate
    Patent number: 11890621
    Abstract: The present invention relates to a method for separating and collecting single aggregates from fumed silica, and a method for classifying a shape of the collected single aggregates, and more specifically, includes preparing a slurry in which fumed silica is dispersed in water; aerosolizing the slurry; and collecting single aggregates of the finned silica in the aerosol using the electric field.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: February 6, 2024
    Assignee: OCI Company LTd.
    Inventors: Younghun Park, Eungchul Kim, Taesung Kim, Sangyup Lee, Kyungyeol Kim, Hwisu Oh
  • Abrasive and Method for Planarization Using the Same
    Publication number: 20230054423
    Abstract: The present invention relates to an abrasive and a planarization method using the same, and more particularly, includes fumed silica. A BET specific surface area of the fumed silica is 200 m2/g to 450 m2/g, a shape of aggregates dispersed in the abrasive has an elongated shape or a round shape, and a ratio of the round shape of the aggregates is 50% to 90%.
    Type: Application
    Filed: January 15, 2021
    Publication date: February 23, 2023
    Inventors: Younghun Park, Eungchul Kim, Taesung Kim, Sangyup Lee, Kyungyeol Kim, Hwisu Oh
  • Method for Separating and Collecting Single Aggregate from Fumed Silica and Method for Classifying Shape of Single Aggregate
    Publication number: 20230057388
    Abstract: The present invention relates to a method for separating and collecting single aggregates from fumed silica, and a method for classifying a shape of the collected single aggregates, and more specifically, includes preparing a slurry in which fumed silica is dispersed in water; aerosolizing the slurry; and collecting single aggregates of the finned silica in the aerosol using the electric field.
    Type: Application
    Filed: January 15, 2021
    Publication date: February 23, 2023
    Inventors: Younghun Park, Eungchul Kim, Taesung Kim, Sangyup Lee, Kyungyeol Kim, Hwisu Oh