Patents by Inventor Hack Seon Kim

Hack Seon Kim 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 of increasing strength of glass substrate for optical filter and tempered-glass optical filter made thereby
    Patent number: 11643361
    Abstract: The present invention provides a method of increasing the strength of a glass substrate for optical filters and a tempered-glass optical filter using a tempered glass substrate manufactured using the same, in which the glass substrate for optical filters is subjected to chemical tempering so that a compressive stress (CS) and a depth of layer (DOL) of the glass substrate are adjusted to increase the bending strength thereof.
    Type: Grant
    Filed: December 24, 2019
    Date of Patent: May 9, 2023
    Inventors: Deok Young Park, Jae Young Hwang, Hak Chul Kim, Hack Seon Kim, Tea Joo Ha
  • METHOD OF INCREASING STRENGTH OF GLASS SUBSTRATE FOR OPTICAL FILTER AND TEMPERED-GLASS OPTICAL FILTER MADE THEREBY
    Publication number: 20200207658
    Abstract: The present invention provides a method of increasing the strength of a glass substrate for optical filters and a tempered-glass optical filter using a tempered glass substrate manufactured using the same, in which the glass substrate for optical filters is subjected to chemical tempering so that a compressive stress (CS) and a depth of layer (DOL) of the glass substrate are adjusted to increase the bending strength thereof.
    Type: Application
    Filed: December 24, 2019
    Publication date: July 2, 2020
    Applicant: UTI INC.
    Inventors: Deok Young Park, Jae Young Hwang, Hak Chul Kim, Hack Seon Kim, Tea Joo Ha