Patents by Inventor David J. Schaaf

David J. Schaaf 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).

  • Plastid transformation of solanaceous plants
    Publication number: 20030177521
    Abstract: A method is provided for transforming solanaceous plants to express DNA sequences interest from the plant cell plastid. The improved method allows the transformation of solanaceous plant tissue which is not obtained from tobacco with DNA constructs. Such DNA constructs comprise, in the 5′ to 3′ direction of transcription, a promoter region functional in a plant plastid and a DNA sequence of interest. The method can be utilized in the transformation of solanaceous plants, such as potato and petunia. The invention further provides constructs and methods for the expression of green fluorescent protein from the plant cell plastid.
    Type: Application
    Filed: February 26, 2003
    Publication date: September 18, 2003
    Inventors: Narender S. Nehra, David J. Schaaf, Vladimir Sidorov, David M. Stalker, Guangning Ye
  • Plastid transformation of solanaceous plants
    Patent number: 6541682
    Abstract: A method is provided for transforming solanaceous plants to express DNA sequences interest from the plant cell plastid. The improved method allows the transformation of solanaceous plant tissue which is not obtained from tobacco with DNA constructs. Such DNA constructs comprise, in the 5′ to 3′ direction of transcription, a promoter region functional in a plant plastid and a DNA sequence of interest. The method can be utilized in the transformation of solanaceous plants, such as potato and petunia. The invention further provides constructs and methods for the expression of green fluorescent protein from the plant cell plastid.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: April 1, 2003
    Assignee: Calgene LLC
    Inventors: Narender S. Nehra, David J. Schaaf, Vladimir Sidorov, David M. Stalker, Guangning Ye
  • Expression of herbicide tolerance genes in plant plastids
    Patent number: 6492578
    Abstract: Provided are constructs and methods for expressing herbicide tolerance genes in plastids of plant cells. Constructs include the components of a promoter functional in a plant plastid, a DNA sequence which is capable of conferring tolerance in a plant cell to at least one herbicide compound when said DNA sequence is transcribed in plastids of said plant cell and a transcription termination region. Herbicide tolerance is produced by transforming plastids with the constructs of the invention and growing plant cells comprising the transformed plastids under conditions wherein the DNA sequence is transcribed and plant plastids and cells containing the plastids are rendered tolerant to applications of at least one herbicide compound.
    Type: Grant
    Filed: July 10, 1999
    Date of Patent: December 10, 2002
    Assignee: Calgene LLC
    Inventors: Jeffrey M. Staub, Peter Hajdukiewicz, Kevin E. McBride, Narender Nehra, David J. Schaaf, David M. Stalker, Guangning Ye
  • Expression of enzymes involved in cellulose modification
    Patent number: 6013860
    Abstract: Novel compositions and methods useful for genetic engineering of plant cells to provide expression in the plastids of a plant or plant cell of cellulose degrading enzymes.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: January 11, 2000
    Assignee: Calgene LLC
    Inventors: Michael E. Himmel, David J. Schaaf, David M. Stalker, Steven R. Thomas