Patents by Inventor Yujian Luo

Yujian Luo 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).

  • CLEAN FRACTURING FLUID THICKENER OF MULTI-BLOCK ASSOCIATIVE COPOLYMER (APCF) AND METHOD PREPARING THEREOF
    Publication number: 20150307770
    Abstract: The present invention relates to a Clean Fracturing Fluid Thickener of Multi-block Associative Copolymer (APCF) and a method preparing thereof. Said Copolymer has evaluating indicators as: (1), the viscosity of its 0.3% water solution at 20° C.?30 mPa·s; (2), the viscosity of said solution after gel breaking?5 mPa·s; and, (3) a static sand-suspending time of said solution?10 min.
    Type: Application
    Filed: April 23, 2014
    Publication date: October 29, 2015
    Inventors: Yan Zheng, Yujian Luo, Xiaodan Bai
  • LIQUEFIED POLYMER FRACTURING FLUID THICKENER AND PREPARATION METHOD THEREOF
    Publication number: 20140336088
    Abstract: The present invention relates to a liquefied polymer fracturing fluid thickener, which has evaluation indexes as: a density of 1.0-1.3 g/cm3; a gelling time less than or equal to 15 s; and a viscosity of its 1.0% solution greater than or equal to 30 mPa·s. The present invention also relates to a method for preparing said liquefied polymer fracturing fluid thickener.
    Type: Application
    Filed: April 23, 2014
    Publication date: November 13, 2014
    Inventors: Yan Zheng, Shusheng Li, Yujian Luo, Xiaodan Bai, Lei Qiao
  • Cleaning brush
    Patent number: D825187
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: August 14, 2018
    Inventor: Yujian Luo
  • Cleaning brush
    Patent number: D825188
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: August 14, 2018
    Inventor: Yujian Luo
  • Foot file
    Patent number: D850724
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: June 4, 2019
    Inventor: Yujian Luo