Patents by Inventor James M. Dunwell

James M. Dunwell 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).

  • Transformation of plant cells
    Patent number: 5464765
    Abstract: Plant cells are transformed by bringing them into contact with a a multiplicity of needle-like bodies on which the cells may be impaled. This causes a rupture in the cell wall allowing entry of transforming DNA either from a surrounding liquid medium or of DNA previously bound to or otherwise entrapped in the needle-like projections.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: November 7, 1995
    Assignee: Zeneca Limited
    Inventors: Ronald A. Coffee, James M. Dunwell
  • Transformation of plant cells
    Patent number: 5302523
    Abstract: Plant cells are transformed by bringing them into contact with a a multiplicity of needle-like bodies on which the cells may be impaled. This causes a rupture in the cell wall allowing entry of transforming DNA either from a surrounding liquid medium or of DNA previously bound to or otherwise entrapped in the needle-like projections.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: April 12, 1994
    Assignee: Zeneca Limited
    Inventors: Ronald Coffee, James M. Dunwell