Patents by Inventor Louanne K. Brown

Louanne K. Brown 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).

  • Method of treating particles
    Patent number: 5462639
    Abstract: Particles (10) contained in a mass of liquid etchant (12) and being wetted and etched thereby are moved into a mass of an inert, etching-terminating liquid (14) which abuts the etchant mass by overcoming surface tension forces exerted on the particles by the etchant at the interface (16,70) of the liquid masses. A vortex (24) of the inert liquid (14) is forced and in turn forces a conformal vortex (60) of the etchant (12) with the particles (10) therein. Turbulence at the interface (70) of the vortices (24,60) and vortex-generated centrifugal force on the particles (10) overcome the surface tension forces, and the particles move into the inert liquid (14).
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: October 31, 1995
    Assignee: Texas Instruments Incorporated
    Inventors: Mark D. Matthews, Louanne K. Brown