Patents by Inventor Jong Hyeok Choi

Jong Hyeok Choi 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).

  • LITHIUM COMPOSITE OXIDE AND POSITIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY CONTAINING SAME
    Publication number: 20240136510
    Abstract: A positive electrode active material including a first lithium composite oxide particle including a secondary particle formed by aggregation of one or more primary particles, and a coating oxide occupying at least a part of at least one of surfaces of the secondary particle, grain boundaries between the primary particles, or surfaces of the primary particles, the positive electrode active material satisfying an equation of 1.3?a/b?3.0, wherein a represents a max peak intensity at 2theta=44.75° to 44.80° and b represents a max peak intensity at 2theta=45.3° to 45.6° in X-ray diffraction (XRD) analysis using Cu K? radiation.
    Type: Application
    Filed: May 21, 2023
    Publication date: April 25, 2024
    Inventors: Yu Gyeong CHUN, Moon Ho CHOI, Yoon Young CHOI, Jong Seung SHIN, Yong Hwan GWON, Jin Ho BAE, Ji Won KIM, Sang Hyeok KIM
  • Multistage variable valve lift apparatus, system and engine
    Patent number: 9267402
    Abstract: A multistage variable valve lift apparatus includes: a camshaft; a plurality of cams slidably provided on the camshaft and each including a cam base with a guide projection and a cam lobe; a solenoid unit that includes an operating rod with a guide slot into which the guide projection is selectively inserted; and a valve opening/closing portion that comes into selective contact any one of the plurality of cams.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: February 23, 2016
    Assignee: Hyundai Motor Company
    Inventors: Soo Hyung Woo, Jong Hyeok Choi, Young Hong Kwak, Byong Young Choi, Jin Kook Kong, Gee Wook Shin
  • MULTISTAGE VARIABLE VALVE LIFT APPARATUS, SYSTEM AND ENGINE
    Publication number: 20140261267
    Abstract: A multistage variable valve lift apparatus includes: a camshaft; a plurality of cams slidably provided on the camshaft and each including a cam base with a guide projection and a cam lobe; a solenoid unit that includes an operating rod with a guide slot into which the guide projection is selectively inserted; and a valve opening/closing portion that comes into selective contact any one of the plurality of cams.
    Type: Application
    Filed: December 30, 2013
    Publication date: September 18, 2014
    Applicant: Hyundai Motor Company
    Inventors: Soo Hyung WOO, Jong Hyeok Choi, Young Hong Kwak, Byong Young Choi, Jin Kook Kong, Gee Wook Shin