Patents by Inventor Si TAN

Si TAN 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 preparing high viscosity index poly-alpha-olefin
    Patent number: 12365848
    Abstract: A method for preparing a high viscosity index poly-?-olefin subjects ?-olefin to a polymerization reaction in the presence of a metallocene catalyst to obtain a poly-?-olefin. The polymerization reaction is carried out in the absence of a solvent, and the metallocene catalyst is formed of, or is formed by interaction between, a metallocene compound and an activator.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: July 22, 2025
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, SHANGHAI RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., LTD.
    Inventors: Zhaolin Yin, Yucai Cao, Dongwen Zhong, Shengbiao Liang, Yongqing Li, Zhenyu Liu, Lujian Li, Xiaofeng Ye, Weizhe Wang, Chen Ni, Jie Li, Fan Wang, Guoyu Liu, Shibing Chen, Xionghua Chen, Wenjun Jiang, Zhenxu Lu, Si Tan, Ruizhen Lu
  • OSCILLATING MIRRORS FOR LIDAR
    Publication number: 20250035886
    Abstract: An oscillating mirror for lidar has a mirror coupled with a rotor. The rotor is arranged to rotate about a pivot using one or more bearings. A mirror is coupled with the rotor and arranged to reflect light emitted from a laser. A first magnet is coupled with the rotor. A second magnet is coupled with a base. The second magnet is arranged to limit an angular rotation of the rotor by a pole of the second magnet facing a similar pole of the first magnet.
    Type: Application
    Filed: July 29, 2024
    Publication date: January 30, 2025
    Applicant: Cepton Technologies, Inc.
    Inventors: Roger Cullumber, Chang Shin, Si Tan, Jun Pei, Liqun Han, Dongyi Liao, Mark A. McCord, Chao Gu
  • SCANNING LIDAR WITH DISCRETE VERTICAL STEPS
    Publication number: 20240183950
    Abstract: A scanning lidar has an illumination source comprising a plurality of lasers and a mirror system. The mirror system reflects light from the illumination source into an environment within a field of view. The mirror system includes a mirror arranged to rotate to reflect light from the illumination source to scan light from the plurality of lasers horizontally within the field of view of the system. The mirror system reflects light from the illumination source to position light, in discrete vertical steps, from the plurality of lasers vertically within the field of view.
    Type: Application
    Filed: December 6, 2023
    Publication date: June 6, 2024
    Applicant: Cepton Technologies, Inc.
    Inventors: Jun Pei, Si Tan, Liqun Han, Dongyi Liao, Roger D. Cullumber, Chang Seok Shin, Mark A. McCord
  • MULTI-SOURCE LIDAR
    Publication number: 20230375674
    Abstract: In a multi-source LiDAR, light from a first illumination source is reflected by rotating mirror into a first field of view, and light from a second illumination source is reflected by the rotating mirror into a second field of view. The second field of view can be arranged to partially overlap the first field of view to provide higher resolution in a region of interest.
    Type: Application
    Filed: May 22, 2023
    Publication date: November 23, 2023
    Applicant: Cepton Technologies, Inc.
    Inventors: Jun PEI, Si Tan, Liang Zhou, Mark A. McCord
  • ROTATING LIDAR MIRROR HAVING DIFFERENT SURFACE WIDTHS
    Publication number: 20230375675
    Abstract: A rotating mirror for LiDAR has a first side and a second side of unequal width. As the rotating mirror spins, light from an illumination source scans different widths of a field of view. By scanning different widths of a field of view, higher resolution can be arranged in a region of interest.
    Type: Application
    Filed: May 22, 2023
    Publication date: November 23, 2023
    Applicant: Cepton Technologies, Inc.
    Inventors: Jun Pei, Si Tan, Liang Zhou, Mark A. McCord
  • METHOD FOR PREPARING HIGH VISCOSITY INDEX POLY-ALPHA-OLEFIN
    Publication number: 20220403278
    Abstract: A method for preparing a high viscosity index poly-?-olefin subjects ?-olefin to a polymerization reaction in the presence of a metallocene catalyst to obtain a poly-?-olefin. The polymerization reaction is carried out in the absence of a solvent, and the metallocene catalyst is formed of, or is formed by interaction between, a metallocene compound and an activator.
    Type: Application
    Filed: October 30, 2020
    Publication date: December 22, 2022
    Inventors: Zhaolin YIN, Yucai CAO, Dongwen ZHONG, Shengbiao LIANG, Yongqing LI, Zhenyu LIU, Lujian LI, Xiaofeng YE, Weizhe WANG, Chen NI, Jie LI, Fan WANG, Guoyu LIU, Shibin CHEN, Xionghua CHEN, Wenjun JIANG, Zhenxu LU, Si TAN, Ruizhen LU