Patents by Inventor Sheila Maddock

Sheila Maddock 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).

  • Induction of male sterility in plants by expression of high levels of avidin
    Patent number: 5962769
    Abstract: Male-sterile plants can be produced by increasing the endogenous concentration of avidin in the plant tissues. This effect can be achieved by producing transgenic plants containing an expression vector in which a promoter is operably linked to a DNA sequence encoding avidin. Methods for restoring male fertility are disclosed. Additionally, methods for production of seeds with one or more desired grain traits are provided.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: October 5, 1999
    Assignee: Pioneer Hi-Bred International, Inc.
    Inventors: Marc C. Albertsen, John A. Howard, Sheila Maddock
  • Commercial production of avidin in plants
    Patent number: 5767379
    Abstract: A method for commercial production of avidin entails heterologous expression of the protein in plants, in native conformation, at an expression level such that avidin represents at least 0.1% of total extracted protein. A genetic map of the integration locus allows for the identification of the avidin-expressing plant. Genetic loci on a plant chromosome are revealed that support high levels of avidin expression and that can be used as a site of integration for high level expression of other genes of interest.
    Type: Grant
    Filed: November 6, 1995
    Date of Patent: June 16, 1998
    Assignee: John Howard
    Inventors: Chris Baszczynski, Elizabeth Hood, Sheila Maddock, Terry EuClaire Meyer, James C. Register, III, Derrick Witcher, John A. Howard