Patents by Inventor Yuyeon JO

Yuyeon JO 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 controlling microstructure and texture of tantalum
    Patent number: 10961613
    Abstract: A method for controlling the microstructure and texture of tantalum is described. The method includes a first forging step for performing upset forging and come-back forging on a tantalum billet multiple times in different directions, the upset forging performed to press two surfaces of the tantalum billet in order to make the two surfaces close to each other and the come-back forging performed to restore the tantalum billet to a rectangular prism shape; and a second forging step for performing wedge forging and come-back forging on the tantalum billet multiple times in different directions, the wedge forging performed to press two edges located in a diagonal direction of the tantalum billet and parallel to each other in order to make the two edges close to each other, and the come-back forging performed to restore the tantalum billet to the rectangular prism shape.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: March 30, 2021
    Assignee: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Seong Lee, Seongho Yang, Sungho Lee, Hyotae Jeong, Yuyeon Jo
  • METHOD FOR CONTROLLING MICROSTRUCTURE AND TEXTURE OF TANTALUM
    Publication number: 20170342537
    Abstract: A method for controlling the microstructure and texture of tantalum, proposed in the present invention, comprises: a step for performing cold working on a tantalum billet having the shape of a rectangular prism; and a step for performing cold rolling multiple times, wherein the step for performing the cold working includes: a first forging step for performing upset forging and come-back forging on the tantalum billet multiple times in different directions, the upset forging being performed to press two surfaces of the tantalum billet in order to make the two surfaces close to each other and the come-back forging being performed to restore the tantalum billet to the original shape; and a second forging step for performing wedge forging and come-back forging on the tantalum billet multiple times in different directions, the wedge forging being performed to press two edges located in a diagonal direction of the tantalum billet and parallel to each other in order to make the two edges close to each other and the
    Type: Application
    Filed: April 23, 2015
    Publication date: November 30, 2017
    Applicant: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Seong LEE, Seongho YANG, Sungho LEE, Hyotae JEONG, Yuyeon JO