Patents by Inventor Ningren Jin

Ningren Jin 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).

  • 4-(5-amino-6-hydroxybenzoxazol-2-yl) ammonium benzoate and preparation method and use thereof
    Patent number: 9725424
    Abstract: Disclosed in the present invention are 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate shown in formula (I) and the preparation method and use thereof. The preparation method comprises: fully reacting 4-(5-amino-6-hydroxybenzoxazol-2-yl)benzoic acid shown in formula (II) or 4-(5-amino-6-hydroxybenzoxazol-2-yl)carboxamide benzoate, as a raw material, with ammonia in an aqueous solvent, and directly heating the obtained reaction liquid to remove excess ammonia, so as to obtain 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate. The mass of the 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate (ABAA) prepared in the present invention can reach a polymer grade (where the purity is above 99.
    Type: Grant
    Filed: February 9, 2013
    Date of Patent: August 8, 2017
    Assignees: ZHEJIANG UNIVERSITY OF TECHNOLOGY, YANCHENG DRAGON CHEMICAL CO., LTD.
    Inventors: Ningren Jin, Biao He, Jing Jin
  • 4-(5-Amino-6-Hydroxybenzoxazol-2-YL) Ammonium Benzoate and Preparation Method and Use Thereof
    Publication number: 20150239856
    Abstract: Disclosed in the present invention are 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate shown in formula (I) and the preparation method and use thereof. The preparation method comprises: fully reacting 4-(5-amino-6-hydroxybenzoxazol-2-yl)benzoic acid shown in formula (II) or 4-(5-amino-6-hydroxybenzoxazol-2-yl)carboxamide benzoate, as a raw material, with ammonia in an aqueous solvent, and directly heating the obtained reaction liquid to remove excess ammonia, so as to obtain 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate. The mass of the 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate (ABAA) prepared in the present invention can reach a polymer grade (where the purity is above 99.
    Type: Application
    Filed: February 9, 2013
    Publication date: August 27, 2015
    Applicants: Zhejiang University of technology, Yancheng Dragon Chemical Co., Ltd.
    Inventors: Ningren Jin, Biao He, Jing Jin