Patents by Inventor Zhengxin Yan

Zhengxin Yan 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).

  • Two-phase system for the production and presentation of foreign antigens in hybrid live vaccines
    Patent number: 6255097
    Abstract: The present invention relates to a genetic engineering process for the optimal production and exposure to the immune system of additional antigen coded for by a live vaccine. The genetic engineering process is based on the use of spontaneous DNA reorganisation in the recombinant live vaccine, such that the recombinant live vaccine spontaneously divides into two subpopulations (A and B), whereby subpopulation A is capable of infecting and acts immunogenically per se as a minimum characteristic and subpopulation B as a minimum characteristic is regenerated by subpopulation A, produces additional antigen and acts immunogenically with respect to said additional antigen.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: July 3, 2001
    Assignee: Max-Planck-Gesellschaft Zu Forderung der Wessenchaften
    Inventors: Thomas Meyer, Johannes Pohlner, Frank U. Reuss, Zhengxin Yan