Patents by Inventor Kimberly E. Lawrence

Kimberly E. Lawrence 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).

  • Concentric micro-nebulizer for direct sample insertion
    Patent number: 4575609
    Abstract: A concentric micro-nebulizer and method for introducing liquid samples into a plasma established in a plasma torch including a first tube connected to a source of plasma gas. The concentric micro-nebulizer has inner and outer concentric tubes extending upwardly within the torch for connection to a source of nebulizer gas and to a source of liquid solvent and to a source of sample liquid. The inner tube is connected to the source of liquid solvent and to the source of sample liquid and the outer tube is connected to the source of nebulizer gas. The outer tube has an orifice positioned slightly below the plasma when it is established, with the inner and outer tubes forming an annulus therebetween with the annular spacing between the tubes at said orifice being less than about 0.05 mm. The dead volume of the inner tube is less than about 5 microliters.
    Type: Grant
    Filed: March 6, 1984
    Date of Patent: March 11, 1986
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Velmer A. Fassel, Gary W. Rice, Kimberly E. Lawrence