Patents by Inventor Fengwang Mao

Fengwang Mao 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).

  • Acetatic abiraterone trifluoroacetate and preparation method and application of same
    Patent number: 9522934
    Abstract: Provided are acetaic abiraterone trifluoroacetate, a preparation method and an application of same. The acetaic abiraterone trifluoroacetate is obtained through a salt-forming reaction between acetaic Abiraterone and trifluoroacetic acid. The acetaic abiraterone trifluoroacetate undergoes self-purification through recrystallization, and dissociation and recrystallization are performed on the purified abiraterone acetate trifluoroacetate, so that the obtained acetaic abiraterone has a high purity, a high yield and stable quality, and is capable of meeting the requirement for mass production of acetaic abiraterone.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: December 20, 2016
    Assignees: Shanghai Cdymax Pharmaceuticals Co., Ltd., Jiangsu Cdymax Pharmaceuticals Co., Ltd., Shanghai Acebright Pharmaceuticals Group Co., Ltd.
    Inventors: Xiaoxia An, Chengjun Huang, Fengwang Mao
  • ACETATIC ABIRATERONE TRIFLUOROACETATE AND PREPARATION METHOD AND APPLICATION OF SAME
    Publication number: 20150133652
    Abstract: Provided are acetaic abiraterone trifluoroacetate, a preparation method and an application of same. The acetaic abiraterone trifluoroacetate is obtained through a salt-forming reaction between acetaic Abiraterone and trifluoroacetic acid. The acetaic abiraterone trifluoroacetate undergoes self-purification through recrystallization, and dissociation and recrystallization are performed on the purified abiraterone acetate trifluoroacetate, so that the obtained acetaic abiraterone has a high purity, a high yield and stable quality, and is capable of meeting the requirement for mass production of acetaic abiraterone.
    Type: Application
    Filed: February 20, 2013
    Publication date: May 14, 2015
    Inventors: Xiaoxia An, Chengjun Huang, Fengwang Mao