Patents by Inventor Joan R. Butterton

Joan R. Butterton 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).

  • Immunizing compositions comprising Vibrio cholerae expressing heterologous antigens
    Patent number: 5747028
    Abstract: A bacterial cell (preferably a gram-negative, enteric bacterium such as V. cholerae) the chromosome of which which contains a DNA sequence encoding a heterologous antigen, which sequence is functionally linked to an iron-regulated promoter such as the irgA promoter of V. cholerae.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 5, 1998
    Assignee: The President and Fellows of Harvard College
    Inventors: Stephen B. Calderwood, Joan R. Butterton, John J. Mekalanos