Patents by Inventor Bernarda Johanna Pitstra

Bernarda Johanna Pitstra 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).

  • Infectious bursitis vaccine
    Patent number: 7211260
    Abstract: The present invention is concerned with isolated infectious bursitis (or bursal) disease virus(es) and a vaccine containing said virus(es) which is capable of protecting poultry against disease caused by infectious bursitis virus, characterized in that the vaccine virus(es) has/have the combined properties of, upon administration to a chicken, causing a reduction in the bursal size, expressed as bursa/body weight ratio, of less than 55%, and the capability to protect poultry having an ELISA antibody titer of at least about 500.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: May 1, 2007
    Assignee: Wyeth Holdings Corporation
    Inventors: Frans Gerrit Davelaar, Bernarda Johanna Pitstra, Nico Van Wiltenburg