Patents by Inventor Emanuel A. Waddell, Jr.

Emanuel A. Waddell, Jr. 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).

  • Surface charge modification within preformed polymer microchannels with multiple applications including modulating electroosmotic flow and creating microarrays
    Patent number: 6982028
    Abstract: A method is described for modifying performed channels fabricated in a variety of substrate materials including PMMA. The method involves exposing a portion of a fluid flow channel to light at a fluence and wavelength which modifies the surface charge of the substrate at the exposure site. The method can be used to modulate electroosmotic flow in channels or to immobilize chemical compounds or biological species in the fluid flow channels at the modified surfaces.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: January 3, 2006
    Assignee: The United States of America as represented by the Secretary of Commerce
    Inventors: Timothy J. Johnson, Emanuel A. Waddell, Jr., David J. Ross, Laurie E. Locascio
  • Chemical modification of substrates by photo-ablation under different local atmospheres and chemical environments for the fabrication of microstructures
    Patent number: 6703189
    Abstract: A method for simultaneously forming microstructures in substrates and altering their chemical character. The method involves exposing a surface portion of a substrate to light source, which is strong enough and of the appropriate wavelength to cause ablation of the substrate. The ablation of the substrate is controlled to form microstructures therein, such as channels. The ablation is conducted under a chemical atmosphere, which causes a change in the chemical functionality of the microstructures. The chemical atmosphere can be a gas, liquid or solid that is provided on the substrate surface. The method can be used to fabricate or modify microfluidic systems.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: March 9, 2004
    Assignee: National Institute of Standards and Technology
    Inventors: Emanuel A. Waddell, Jr., Timothy J. Johnson, Gary W. Kramer, Laurie E. Locascio
  • Surface charge modification within preformed polymer microchannels with multiple applications including modulating electroosmotic flow and creating microarrays
    Publication number: 20020023840
    Abstract: A method for modifying and controlling fluid flow in channels formed in substrates. The method involves exposing a portion of a fluid flow channel to light at a fluence which modifies the surface charge of the substrate at the exposure site. The method can be used to immobilize chemical compounds or biological species in the fluid flow channels at the modified surfaces.
    Type: Application
    Filed: July 13, 2001
    Publication date: February 28, 2002
    Inventors: Timothy J. Johnson, Emanuel A. Waddell, Jr., David J. Ross, Laurie E. Locascio