Patents Assigned to YISHENG BIOPHARMA HOLDINGS LTD.
  • Method for reducing DNA impurities in viral compositions
    Patent number: 8778653
    Abstract: A method for purification of viral compositions is provided. In particular, a method for reduction of unwanted residual DNA in a viral composition while retaining the immunogenicity of the virus itself is provided. The resulting immunogenic viral composition is substantially free of residual DNA, and is useful for the manufacture of medical products, such as vaccines designed for human or animal.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: July 15, 2014
    Assignee: Yisheng Biopharma Holdings Ltd.
    Inventors: Yi Zhang, Jinming Dai, Yajin Ni
  • Method for Reducing DNA Impurities in Viral Compositions
    Publication number: 20130203152
    Abstract: A method for purification of viral compositions is provided. In particular, a method for reduction of unwanted residual DNA in a viral composition while retaining the immunogenicity of the virus itself is provided. The resulting immunogenic viral composition is substantially free of residual DNA, and is useful for the manufacture of medical products, such as vaccines designed for human or animal.
    Type: Application
    Filed: August 12, 2010
    Publication date: August 8, 2013
    Applicant: YISHENG BIOPHARMA HOLDINGS LTD.
    Inventors: Yi Zhang, Jinming Dai, Yajin Ni