Patents by Inventor Bang M. Kim

Bang M. Kim 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).

  • Process for acid recovery from waste water
    Patent number: 4306946
    Abstract: Anions such as chromate ions are removed from a stream of waste water through an anion selective membrane and are subsequently combined with hydrogen ions transferred across a cation selective membrane in a two-phase Donnan dialysis acid recovery process. In a preferred embodiment chromate ions recovered from an electroplating process rinse solution are recycled to an associated electroplating bath as chromic acid while the chromate ion-depleted rinse solution is recycled to an associated rinse tank.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: December 22, 1981
    Assignee: General Electric Company
    Inventor: Bang M. Kim
  • Gas concentration analysis method and system
    Patent number: 4208902
    Abstract: A method and system for analyzing gas concentration by measuring the steady state pressure in a dual membrane cell. A first membrane is exposed to a test gas and a second membrane to a reference gas where the first and second membranes have differing permeabilities. The test gas and the reference gas continuously counterdiffuse through the membranes and the steady state pressure in the intermembrane space is directly proportional to the gas concentration of the test gas component.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: June 24, 1980
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Bang M. Kim, John A. Quinn, David J. Graves