Patents by Inventor Susan E. Langston

Susan E. Langston 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).

  • Mass production in liquid culture of insect-killing nematodes
    Patent number: 5023183
    Abstract: Entomogenous nematodes can be used as biological insecticides for the control of certain pests. The present invention provides a large-scale production in liquid culture of these entomogenous nematodes using an improved liquid culture medium. The medium uses an emulsifier to provide a well homogenized growth medium. The invention also provides a method of cultivating entomogenous nematodes on a commercial scale, in liquid culture, in fermenters by controlling the agitation rate as a function of oxygen demand.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: June 11, 1991
    Assignee: Biosys Corporation
    Inventors: Milton J. Friedman, Susan E. Langston, Sonia Pollitt