Patents by Inventor Richard A. Krzyzek

Richard A. Krzyzek 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).

  • Stable transformation of maize cells by electroporation
    Patent number: 5472869
    Abstract: The present invention provides a method to increase the susceptibility of cultured Zea mays cells to stable transformation with recombinant DNA via electroporation, by pretreating the Zea mays cells with certain pectin-degrading enzymes, so that the cells retain their ability to regenerate fertile, transgenic Zea mays plants containing the DNA which is also heritable.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: December 5, 1995
    Assignee: DeKalb Genetics Corporation
    Inventors: Richard A. Krzyzek, Cheryl R. M. Laursen, Paul C. Anderson
  • Genetic transformation of maize cells by electroporation of cells pretreated with pectin degrading enzymes
    Patent number: 5384253
    Abstract: The present invention provides a method to increase the susceptibility of cultured Zea mays cells to stable transformation with recombinant DNA via electroporation, by pretreating the Zea mays cells with certain pectin-degrading enzymes, so that the cells retain their ability to regenerate fertile, transgenic Zea mays plants containing the DNA which is also heritable.
    Type: Grant
    Filed: December 28, 1990
    Date of Patent: January 24, 1995
    Assignee: DeKalb Genetics Corporation
    Inventors: Richard A. Krzyzek, Cheryl R. M. Laursen, Paul C. Anderson
  • Co-aggregate purification of proteins
    Patent number: 4673641
    Abstract: Methods are provided for stabilization and purification of proteins produced in host cell systems. The methods provide for significant stabilization of any unfused non-bacterial protein that is produced in the same host cell that is producing an aggregate-forming fusion protein or any aggregate-forming protein.
    Type: Grant
    Filed: January 25, 1984
    Date of Patent: June 16, 1987
    Assignee: Molecular Genetics Research and Development Limited Partnership
    Inventors: Henry J. George, Richard A. Krzyzek, Lynn W. Enquist, Roger J. Watson