Patents by Inventor Zheng Ruan

Zheng Ruan 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 industrially preparing nitrogen substituted amino-5,6,7,8-tetrahydronaphthol
    Patent number: 8809590
    Abstract: A method for industrially preparing a nitrogen substituted 6-amino-5,6,7,8-tetrahydronaphthol includes reacting a nitrogen substituted amino-5,6,7,8-tetrahydronaphthol compound of formula (II) with a 2-substituted ethyl sulfonate compound of formula (III) under an alkaline condition and in the presence of a sulfite.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: August 19, 2014
    Assignee: Shan Dong Luye Pharmaceutical Co., Ltd.
    Inventors: Qingguo Meng, Mina Yang, Tao Wang, Qilin Wang, Jun Li, Zheng Ruan
  • METHOD FOR INDUSTRIALLY PREPARING NITROGEN SUBSTITUTED AMINO-5,6,7,8-TETRAHYDRONAPHTHOL
    Publication number: 20140121380
    Abstract: A method for industrially preparing a nitrogen substituted 6-amino-5,6,7,8-tetrahydronaphthol is disclosed. The method comprises includes reacting a nitrogen substituted amino-5,6,7,8-tetrahydronaphthol compound of formula (II) with a 2-substituted ethyl sulfonate compound of formula (III) under an alkaline condition and in the presence of a sulfite.
    Type: Application
    Filed: June 21, 2012
    Publication date: May 1, 2014
    Applicant: SHAN DONG LUYE PHARMACEUTICAL CO., LTD.
    Inventors: Qingguo Meng, Mina Yang, Tao Wang, Qilin Wang, Jun Li, Zheng Ruan