Patents by Inventor Michael G. Trulear

Michael G. Trulear 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 for inhibiting scale in high-cycle aqueous systems
    Patent number: 6645384
    Abstract: A composition and an improved method for treating aqueous systems to prevent the accumulation of mineral scale and corrosion which comprises adding to the aqueous system a treatment solution comprising 2 phosphonobutane 1,2,4 tricarboxylic acid and a quad-polymer that includes four discrete monomers (specifically allyloxybenzenesulfonic acid, methallyl sulfonic acid, a copolymerizable non-ionic monomer and an olefinically unsaturated carboxylic acid monomer). The composition and method allow the use of higher cycles of concentration, including aqueous systems having calcite saturation indices (CSI) of more than 200, while inhibiting the formation of calcium carbonate, calcium phosphate, magnesium silicate, and iron scales.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: November 11, 2003
    Assignee: Chemtreat, Inc.
    Inventors: John Richardson, Michael G. Trulear, Richard H. Tribble
  • Oxidation and measurement of phosphonates in aqueous solutions
    Patent number: 6177276
    Abstract: The invention provides methods and apparatuses for oxidizing phosphonate in an aqueous solution, for determining the concentration of phosphonate present in an aqueous solution, and for controlling the concentration of phosphonate present in an aqueous solution. Optionally, one or more computers are used to automate the methods.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: January 23, 2001
    Assignee: ChemTreat, Inc.
    Inventors: John Richardson, Michael G. Trulear
  • Method for controlling treatment chemicals in aqueous systems
    Patent number: 6153110
    Abstract: A method is provided for monitoring and controlling the level of treatment chemicals in an aqueous system, such as a cooling water system or boiler system, through the direct measurement of one or more chemically active polymers. Polymers typically function as scale inhibitors and dispersants in a water treatment system and exist in aqueous systems in both free and bound states, the free and bound states together comprising the total polymer present in the aqueous system. The ratio of free polymer level to total polymer level defines the polymer inhibition efficiency of the system and provides an indication of the effectiveness of the water treatment program. The total polymer level may be used to determine the volume of treatment chemicals added to the system, while the free polymer to total polymer ratio indicates the dosage required to maintain system performance.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: November 28, 2000
    Assignee: ChemTreat, Inc.
    Inventors: John Richardson, Michael G. Trulear
  • Use of sulfamic acid to inhibit phosphonate decomposition by chlorine-bromine mixtures
    Patent number: 4759852
    Abstract: The decomposition of phosphonates by chlorine-bromine solutions present in industrial process waters can be diminished or prevented by treating such waters with sulfamic acid.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: July 26, 1988
    Assignee: Nalco Chemical Company
    Inventor: Michael G. Trulear