Patents by Inventor David M McConchie

David M McConchie 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).

  • Processes for water treatment
    Patent number: 7077963
    Abstract: The invention provides compositions comprising bauxite refinery residues that have been reacted with sufficient calcium and magnesium ions that they have a reaction pH of less than 10.5, and one or more water treating additives. The invention also provides processes for treatment of water containing dissolved inorganic substances involving stepwise treatment of the water in which the reacted bauxite refinery residues are added after the addition of a pH-raising additive. The invention also provides processes for treatment of water containing dissolved inorganic substances in which the reacted bauxite refinery residues are added stepwise, with one or more water treating additives also being added in at least one of the steps.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: July 18, 2006
    Assignee: Nauveau Technology Investments
    Inventors: David M McConchie, Malcolm William Clark, Fiona Gaye Davies-McConchie
  • Processes and compositions for water treatment
    Publication number: 20040040912
    Abstract: The invention provides compositions comprising bauxite refinery residues that have been reacted with sufficient calcium and magnesium ions that they have a reaction pH of less than 10.5, and one or more water treating additives. The invention also provides processes for treatment of water containing dissolved inorganic substances involving stepwise treatment of the water in which the reacted bauxite refinery residues are added after the addition of a pH-raising additive. The invention also provides processes for treatment of water containing dissolved inorganic substances in which the reacted bauxite refinery residues are added stepwise, with one or more water treating additives also being added in at least one of the steps.
    Type: Application
    Filed: September 17, 2003
    Publication date: March 4, 2004
    Inventors: David M. McConchie, Malcolm William Clark, Fiona Gaye Davies-McConchie