Patents by Inventor Zhangming Liu

Zhangming Liu 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).

  • Downlight apparatus
    Patent number: 10876693
    Abstract: A downlight apparatus has a main cup housing, a driver circuit, a first LED set, a second LED set and a light guide cup. The driver circuit is contained in the main cup housing for converting an external power to a driving current. The first LED generates a central luminous effect. The light guide cup has a top part and a bottom part. A light output pattern is formed on internal surface of the light guide cup between the top part and the bottom part. The top part receives a light of the second LED set. The light enters the light guide cup and escapes from the light output pattern.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: December 29, 2020
    Assignee: LEEDARSON LIGHTING CO. LTD.
    Inventors: Ke Li, Xiaoliang Wen, Zhangming Liu, Maojin Zeng
  • DOWNLIGHT APPARATUS
    Publication number: 20190120448
    Abstract: A downlight apparatus has a main cup housing, a driver circuit, a first LED set, a second LED set and a light guide cup. The driver circuit is contained in the main cup housing for converting an external power to a driving current. The first LED generates a central luminous effect. The light guide cup has a top part and a bottom part. A light output pattern is formed on internal surface of the light guide cup between the top part and the bottom part. The top part receives a light of the second LED set. The light enters the light guide cup and escapes from the light output pattern.
    Type: Application
    Filed: April 3, 2018
    Publication date: April 25, 2019
    Inventors: Ke Li, Xiaoliang Wen, Zhangming Liu, Maojin Zeng
  • Glucose isomerase mutants
    Patent number: 7919300
    Abstract: This invention describes a series of recombinant Thermoanaerobacterium saccharolyticum glucose isomerases having improved catalytic activity and thermostability. The recombinant glucose isomerases can be used for direct production of fructose syrup containing 55 wt % or higher concentration of fructose, or used for the production of fructose syrup containing less than 55 wt % fructose.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: April 5, 2011
    Inventors: Jun Wang, Rongzhao Fu, Dong Shen, Caike Jin, Zhangming Liu, Junming Chen
  • Glucose Isomerase Mutants
    Publication number: 20080113415
    Abstract: This invention describes a series of recombinant Thermoanaerobacterium saccharolyticum glucose isomerases having improved catalytic activity and thermostability. The recombinant glucose isomerases can be used for direct production of fructose syrup containing 55 wt % or higher concentration of fructose, or used for the production of fructose syrup containing less than 55 wt % fructose.
    Type: Application
    Filed: July 28, 2004
    Publication date: May 15, 2008
    Inventors: Jun Wang, Pongzhao Fu, Dorg Shen, Caike Jin, Zhangming Liu, Junming Chen