Patents by Inventor Yongsheng Duan

Yongsheng Duan 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).

  • Liquid-phase hydroisomerization system and process therefor and use thereof
    Patent number: 10683459
    Abstract: Provided are a liquid-phase hydroisomerization system and a process therefor and use thereof. The system comprises a gas-liquid mixer (3), a hydroisomerization reactor (4) and a fractionating column (6). An oil product and hydrogen are mixed as a liquid hydrogen-oil mixture, and are introduced into the hydroisomerization reactor for a hydroisomerization reaction, and after being fractionated, a target product is led out. A supplemental hydrogen-dissolving inner member is provided at least between a group of two adjacent catalyst bed layers in order to supplement hydrogen to the reactants. The process cancels a circulating hydrogen compressor, has a simple process flow, and can be applied to the production of a lubricant base oil by the hydroisomerization of a lubricant raw material or the production of a low freezing point diesel by the hydroisomerization of and the reduction in the freezing point of a diesel raw material.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: June 16, 2020
    Assignee: PetroChina Company Limited
    Inventors: Shoutao Ma, Xiaoqiao Huang, Famin Sun, Qingfeng Ma, Fangming Xie, Yongsheng Duan, Xianjun Wu, Fengxuan Li, Dongmei Ge, Endong Xia, Ruifeng Li, Ronglei Ji, Liying Liu, Lihong Qin, Xiangbin Meng, Chunming Dong, Xuefeng Lu, Rui Wang, Tiegang Xu, Shurong Ni
  • Liquid-Phase Hydroisomerization System And Process Therefor And Use Thereof
    Publication number: 20180223194
    Abstract: Provided are a liquid-phase hydroisomerization system and a process therefor and use thereof. The system comprises a gas-liquid mixer (3), a hydroisomerization reactor (4) and a fractionating column (6). An oil product and hydrogen are mixed as a liquid hydrogen-oil mixture, and are introduced into the hydroisomerization reactor for a hydroisomerization reaction, and after being fractionated, a target product is led out. A supplemental hydrogen-dissolving inner member is provided at least between a group of two adjacent catalyst bed layers in order to supplement hydrogen to the reactants. The process cancels a circulating hydrogen compressor, has a simple process flow, and can be applied to the production of a lubricant base oil by the hydroisomerization of a lubricant raw material or the production of a low freezing point diesel by the hydroisomerization of and the reduction in the freezing point of a diesel raw material.
    Type: Application
    Filed: June 8, 2016
    Publication date: August 9, 2018
    Inventors: Shoutao Ma, Xiaoqiao Huang, Famin Sun, Qingfeng Ma, Fangming Xie, Yongsheng Duan, Xianjun Wu, Fengxuan Li, Dongmei Ge, Endong Xia, Ruifeng Li, Ronglei Ji, Liying Liu, Lihong Qin, Xiangbin Meng, Chunming Dong, Xuefeng Lu, Rui Wang, Tiegang Xu, Shurong Ni
  • Earphone charging case
    Patent number: D942386
    Type: Grant
    Filed: February 7, 2021
    Date of Patent: February 1, 2022
    Inventor: Yongsheng Duan
  • Earphone charging case
    Patent number: D942387
    Type: Grant
    Filed: February 7, 2021
    Date of Patent: February 1, 2022
    Inventor: Yongsheng Duan
  • Earphone charging case
    Patent number: D984374
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: April 25, 2023
    Inventor: Yongsheng Duan
  • Wireless earphones with charging case
    Patent number: D986859
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: May 23, 2023
    Inventor: Yongsheng Duan