Patents by Inventor Qin Tian

Qin Tian 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 branched polycarbonate with continuous two-phase interface phosgene method
    Patent number: 9683078
    Abstract: The present invention relates to a method for preparing branched polycarbonate with a continuous two-phase interface phosgene method. Firstly, an aqueous solution of alkali metal hydroxide with triphenol and polyphenol dissolved therein reacts with a certain amount of phosgene in the present of inert organic solvent to prepare a prepolymer, and then a coupling reaction is performed among the prepolymer, an aqueous solution of alkali metal hydroxide with bisphenol and phosgene dissolved therein to finally obtain a polycarbonate resin. The method can avoid a cross-linking reaction, reduce the cost and improve the quality of the product, while improving the conversion ratio of the branching agent and the branching degree of the product.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: June 20, 2017
    Assignee: Wanhua Chemical Group Co., Ltd.
    Inventors: Lei Zhang, Zhikun Gao, Zhansen Xiong, Hongke Zhang, Qin Tian, Weiqi Hua
  • METHOD FOR PREPARING BRANCHED POLYCARBONATE WITH CONTINUOUS TWO-PHASE INTERFACE PHOSGENE METHOD
    Publication number: 20160200864
    Abstract: The present invention relates to a method for preparing branched polycarbonate with a continuous two-phase interface phosgene method. Firstly, an aqueous solution of alkali metal hydroxide with triphenol and polyphenol dissolved therein reacts with a certain amount of phosgene in the present of inert organic solvent to prepare a prepolymer, and then a coupling reaction is performed among the prepolymer, an aqueous solution of alkali metal hydroxide with bisphenol and phosgene dissolved therein to finally obtain a polycarbonate resin. The method can avoid a cross-linking reaction, reduce the cost and improve the quality of the product, while improving the conversion ratio of the branching agent and the branching degree of the product.
    Type: Application
    Filed: September 9, 2013
    Publication date: July 14, 2016
    Applicants: Wanhua Chemical Group Co., Ltd., Wanhua Chemical (Ningbo) Co., Ltd.
    Inventors: Lei Zhang, Zhikun Gao, Zhansen Xiong, Hongke Zhang, Qin Tian, Weiqi Hua
  • Glycyrrhetinic acid-mediated nanoparticles of hepatic targeted drug delivery system, process for preparing the same and use thereof
    Patent number: 9173852
    Abstract: Disclosed are a hepatic targeted drug delivery system and a process for preparing the same. Also disclosed is a method for treating liver cancer.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: November 3, 2015
    Assignees: TIAN SI POLYMER MATERIALS TECHNOLOGY DEVELOPMENT CO., NANKAI UNIVERSITY
    Inventors: Zhi Yuan, Wei Huang, Qin Tian, Chuangnian Zhang, Liang Han, Tong Liu, Yue Zhang, Yue Chen
  • GLYCYRRHETINIC ACID-MEDIATED NANOPARTICLES OF HEPATIC TARGETED DRUG DELIVERY SYSTEM, PROCESS FOR PREPARING THE SAME AND USE THEREOF
    Publication number: 20090252803
    Abstract: Disclosed are a hepatic targeted drug delivery system and a process for preparing the same. Also disclosed is a method for treating liver cancer.
    Type: Application
    Filed: December 18, 2008
    Publication date: October 8, 2009
    Inventors: Zhi YUAN, Wei Huang, Qin Tian, Chuangnian Zhang, Liang Han, Tong Liu, Yue Zhang, Yue Chen
  • Pet toy
    Patent number: D972235
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: December 6, 2022
    Inventor: Qin Tian