Patents by Inventor Khac T. Nguyen

Khac T. Nguyen 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).

  • AQUEOUS SYSTEMS HAVING LOW LEVELS OF CALCIUM CONTAINING COMPONENTS
    Publication number: 20150376041
    Abstract: Hydroxycarboxylic acids and/or transition metal salts may be added to an aqueous system to inhibit corrosion and/or scale deposition within the aqueous system. The aqueous system may include a calcium containing component in an amount ranging from about 0.01 ppm to about 200 ppm. The hydroxycarboxylic acid may have two or more carboxylic acid groups. The transition metal salt may have or include a transition metal, such as but not limited to, Zn (II), Zn (IV), Sn, Al, Mn, Mo, and combinations thereof. The aqueous system may be or include a cooling tower, a cooling water system, and combinations thereof.
    Type: Application
    Filed: May 6, 2015
    Publication date: December 31, 2015
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Mary Jane Legaspi Felipe, David L. N. Fulmer, Khac T. Nguyen, Bing Bing Guo
  • Composition for controlling silica and water soluble silicate deposition
    Patent number: 5393456
    Abstract: A method for the inhibition of silica and silicate deposits on the internal surfaces of a water system consisting of adding to the water system a composition comprised of a blend of two water soluble copolymers. The first copolymer contains repeat units of maleic or acrylic acids and a phosphinic acid, or salt forms thereof. The second copolymer contains repeat units of acrylic acid and allyl hydroxy propyl sulfonate ether, or salt forms thereof.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: February 28, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Libardo A. Perez, J. Michael Brown, Khac T. Nguyen
  • Method for controlling silica and water soluble silicate deposition
    Patent number: 5256302
    Abstract: A method for the inhibition of silica and silicate deposits on the internal surfaces of a water system consisting of adding to the water system a composition comprised of a blend of two water soluble copolymers. The first copolymer contains repeat units of maleic or acrylic acids and a phosphinic acid, or salt forms thereof. The second copolymer contains repeat units of acrylic acid and allyl hydroxy propyl sulfonate ether, or salt forms thereof.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: October 26, 1993
    Assignee: Betz Laboratories, Inc.
    Inventors: Libardo A. Perez, J. Michael Brown, Khac T. Nguyen