Patents by Inventor Chaogang Wu

Chaogang Wu 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).

  • Process for preparing bupropion hydrochloride
    Patent number: 7737302
    Abstract: This invention described a synthesis method of bupropion hydrochloride. m-chloropropiophenone was brominated directly with bromine, then aminated with t-butylamine and finally reacted with HCl to obtain crude product of bupropion hydrochloride. Pure product was obtained after recrystallization. This method is convenient and suitable for commercial manufacturing because of low cost of production, high yield, less byproducts and being environmental friendly.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: June 15, 2010
    Assignee: Zhejiang Apeloa Medical Technology Co., Ltd.
    Inventors: Chaogang Wu, Huayou Xiang, Xianghua Yu, Chun He, Fengying Li, Xianghong Shi, Chengyue Lu, Guoliang Chen, Yangxiang Ge
  • Process for preparing bupropion hydrochloride
    Publication number: 20090012328
    Abstract: This invention described a synthesis method of bupropion hydrochloride. m-chloropropiophenone was brominated directly with bromine, then aminated with t-butylamine and finally reacted with HCl to obtain crude product of bupropion hydrochloride. Pure product was obtained after recrystallization. This method is convenient and suitable for commercial manufacturing because of low cost of production, high yield, less byproducts and being environmental friendly.
    Type: Application
    Filed: July 7, 2008
    Publication date: January 8, 2009
    Inventors: Chaogang Wu, Huayou Xiang, Xianghua Yu, Chun He, Fengying Li, Xianghong Shi, Chengyue Lu, Guoliang Chen, Yangxiang Ge