Patents by Inventor Pi-Shan Chiang

Pi-Shan Chiang 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).

  • Solvent-free process for the preparation of cyclophosphamide
    Patent number: 9115160
    Abstract: This invention discloses a solvent-free process for the preparation of cyclophosphamide. According to this invention, there is no solvent used during the reaction step for preparing cyclophosphamide, so that the total volume of the reaction for preparing cyclophosphamide can be reduced and the manufacture of cyclophosphamide can become more efficient. Furthermore, the above solvent-free process for the preparation of cyclophosphamide is more simply operated, more economic, and more environmental friendly than the preparation of cyclophosphamide in the prior art.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: August 25, 2015
    Assignee: SUNNY PHARMTECH INC.
    Inventors: Jien-Heh Tien, Pi-Shan Chiang
  • Solvent-Free Process for the Preparation of Cyclophosphamide
    Publication number: 20140066654
    Abstract: This invention discloses a solvent-free process for the preparation of cyclophosphamide. According to this invention, there is no solvent used during the reaction step for preparing cyclophosphamide, so that the total volume of the reaction for preparing cyclophosphamide can be reduced and the manufacture of cyclophosphamide can become more efficient. Furthermore, the above solvent-free process for the preparation of cyclophosphamide is more simply operated, more economic, and more environmental friendly than the preparation of cyclophosphamide in the prior art.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 6, 2014
    Applicant: Sunny Pharmtech Inc.
    Inventors: Jien-Heh Tien, Pi-Shan Chiang