Patents by Inventor Chengwu Liu

Chengwu 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).

  • Dominant salt forms of pyrimidine derivatives, and crystal forms thereof
    Patent number: 12252487
    Abstract: Disclosed are sodium salts of pyrimidine derivatives, and a series of crystal forms thereof. The series of crystal forms exhibit a good druggability, such as stability, fluidity, compressibility, etc., and provide a variety of options of APIs for subsequent drug product development.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: March 18, 2025
    Assignee: GUANGDONG RAYNOVENT BIOTECH CO., LTD.
    Inventors: Xiaoxin Chen, Chengwu Liu, Zhuowei Liu, Zhenyou Tan, Zhiqiang Liu, Zhiwei Cheng, Chaofeng Long, Jiajun Huang, Guangqiang Zhou
  • Crystal form and salt form of pyridoimidazole compound and preparation method therefor
    Patent number: 11535613
    Abstract: Disclosed are a crystal form and a salt form of a pyrazolopridine compound, and a preparation method therefor. Further included is the use of the crystal form in preparing anti-influenza virus drugs.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: December 27, 2022
    Assignee: GUANGDONG RAYNOVENT BIOTECH CO., LTD.
    Inventors: Jian Xiong, Xiaoxin Chen, Jingjing Wang, Zhuowei Liu, Kevin X Chen, Chengwu Liu, Cheng Xie, Chaofeng Long, Peng Li, Jian Li, Shuhui Chen
  • DOMINANT SALT FORMS OF PYRIMIDINE DERIVATIVES, AND CRYSTAL FORMS THEREOF
    Publication number: 20220380363
    Abstract: Disclosed are sodium salts of pyrimidine derivatives, and a series of crystal forms thereof. The series of crystal forms exhibit a good druggability, such as stability, fluidity, compressibility, etc., and provide a variety of options of APIs for subsequent drug product development.
    Type: Application
    Filed: June 24, 2020
    Publication date: December 1, 2022
    Inventors: Xiaoxin Chen, Chengwu Liu, Zhuowei Liu, Zhenyou Tan, Zhiqiang Liu, Zhiwei Cheng, Chaofeng Long, Jiajun Huang, Guangqiang Zhou
  • CRYSTAL FORM AND SALT FORM OF PYRIDOIMIDAZOLE COMPOUND AND PREPARATION METHOD THEREFOR
    Publication number: 20200407354
    Abstract: Disclosed are a crystal form and a salt form of a pyrazolopridine compound, and a preparation method therefor. Further included is the use of the crystal form in preparing anti-influenza virus drugs.
    Type: Application
    Filed: March 5, 2019
    Publication date: December 31, 2020
    Inventors: Jian Xiong, Xiaoxin Chen, Jingjing Wang, Zhuowei Liu, Kevin X Chen, Chengwu Liu, Cheng Xie, Chaofeng Long, Peng Li, Jian Li, Shuhui Chen
  • Method for remanufacturing ultra-large copper nut
    Patent number: 10058959
    Abstract: A method for remanufacturing an ultra-large copper nut includes steps of: step (1) coarsening treatment; step (2) purifying treatment; step (3) detecting a material of the ultra-large copper nut; step (4) sleeving a thermal insulation device; step (5) preheating the ultra-large copper nut; step (6) melting-deposition shaping; step (7) post-processing; and step (8) detecting. The method of the present invention simultaneously utilizes water, electricity, gas, fire and machine and performs melting-deposition on materials by simultaneously supplying water, electricity, gas, fire and machine according to the designed requirements. The method of the present invention solves problems of large thickness abrasion and remediation of fracture components. The method of the present invention is capable of preventing the ultra-large copper nut from deformation and collapse and is a feasible remanufacturing for decreasing the huge economic loss caused by damages of expensive ultra-large of nonferrous metals.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: August 28, 2018
    Assignee: Wuhan Kaiming High Tech Co., Ltd.
    Inventors: Kaiming Zhang, Xubing Chen, Jiang Li, Zhigang Fu, Mingxi Li, Hongbo Zhao, Guanglei Chen, Sigu Zhu, Zhitian Liu, Li Lin, Wenbin Luo, Fuquan Liu, Hejiao Xiao, Daoguo Zhou, Yide Liao, Zhenlin Yang, Ganggui Hu, Guilin Zheng, Weiguo Wu, Chengwu Liu
  • Method for remanufacturing ultra-large copper nut
    Publication number: 20160031048
    Abstract: A method for remanufacturing an ultra-large copper nut includes steps of: step (1) coarsening treatment; step (2) purifying treatment; step (3) detecting a material of the ultra-large copper nut; step (4) sleeving a thermal insulation device; step (5) preheating the ultra-large copper nut; step (6) melting-deposition shaping; step (7) post-processing; and step (8) detecting. The method of the present invention simultaneously utilizes water, electricity, gas, fire and machine and performs melting-deposition on materials by simultaneously supplying water, electricity, gas, fire and machine according to the designed requirements. The method of the present invention solves problems of large thickness abrasion and remediation of fracture components. The method of the present invention is capable of preventing the ultra-large copper nut from deformation and collapse and is a feasible remanufacturing for decreasing the huge economic loss caused by damages of expensive ultra-large of nonferrous metals.
    Type: Application
    Filed: October 9, 2015
    Publication date: February 4, 2016
    Inventors: Kaiming Zhang, Xubing Chen, Jiang Li, Zhigang Fu, Mingxi Li, Hongbo Zhao, Guanglei Chen, Sigu Zhu, Zhitian Liu, Li Lin, Wenbin Luo, Fuquan Liu, Hejiao Xiao, Daoguo Zhou, Yide Liao, Zhenlin Yang, Ganggui Hu, Guilin Zheng, Weiguo Wu, Chengwu Liu