Patents by Inventor Yuzhu Liu

Yuzhu 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).

  • Automatic weldding method and device for prestressed tubular piles
    Patent number: 11986907
    Abstract: In the automatic welding method and device for prestressed tubular piles provided in the present application, which is applied in welding equipment, a detection is conducted around a connection position between prestressed tubular piles and a position of a target welding seam is obtained. Then the target welding seam is welded around the prestressed tubular piles according to the position of the target welding seam.
    Type: Grant
    Filed: February 14, 2023
    Date of Patent: May 21, 2024
    Assignee: Guangzhou Municipal Engineering Testing Co., Ltd.
    Inventors: Xiaoli Sun, Zhiguo Zhou, Jun Yang, Liangjun Hu, Jixi Shao, Decun Bian, Yuzhu Zhang, Hao Li, Lu Liu, Yongxiao Du, Xiaohua Yuan
  • Color-developing agent resin composition, emulsion thereof and method for preparing the same
    Patent number: 7153628
    Abstract: The present invention relates to a color-developing agent resin composition, which contains: (1) a phenolic resin represented by formula I; and (2) a blend of graft copolymers of a phenolic resin and a multivalent metal salt polymer of a substituted aryl carboxylic acid, said graft copolymers are represented by (II) and (III). The present invention further relates to a resin emulsion containing the color-developing agent resin composition and a method for preparing the same. The color-developing agent resin composition and the color-developing agent resin emulsion of the present invention are used for no-carbon copying paper as special resin color-developing agents. They have advantages of not only fast developing at a low temperature and bright colors, but also heavy developing strength and good light-aging resistance of writing, and furthermore, their coatings are not easy to turn yellow when they are hold in the air, and the like.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: December 26, 2006
    Inventors: Zonglai Liu, Chunxuan Guo, Wei Zhang, Yuzhu Liu
  • Color-developing agent resin composition, emulsion thereof and method for preparing the same
    Publication number: 20050095526
    Abstract: The present invention relates to a color-developing agent resin composition, which contains: (1) a phenolic resin represented by formula I; and (2) a blend of graft copolymers of a phenolic resin and a multivalent metal salt polymer of a substituted aryl carboxylic acid, said graft copolymers are represented by (II) and (III). The present invention further relates to a resin emulsion containing the color-developing agent resin composition and a method for preparing the same. The color-developing agent resin composition and the color-developing agent resin emulsion of the present invention are used for no-carbon copying paper as special resin color-developing agents. They have advantages of not only fast developing at a low temperature and bright colors, but also heavy developing strength and good light-aging resistance of writing, and furthermore, their coatings are not easy to turn yellow when they are hold in the air, and the like.
    Type: Application
    Filed: April 8, 2004
    Publication date: May 5, 2005
    Inventors: Zonglai Liu, Chunxuan Guo, Wei Zhang, Yuzhu Liu
  • Cable connector
    Patent number: D709834
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: July 29, 2014
    Assignee: Yueqing Xindali Industries Co., Ltd.
    Inventor: Yuzhu Liu
  • Ring size adjuster
    Patent number: D966927
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: October 18, 2022
    Assignee: Shenzhen Yuecaipinshang Household Products Co., Lld.
    Inventor: Yuzhu Liu
  • Air mover
    Patent number: D1015523
    Type: Grant
    Filed: August 11, 2023
    Date of Patent: February 20, 2024
    Inventor: Yuzhu Liu