Patents by Inventor Charles Ngome

Charles Ngome 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 deinking pulp using premixed hydrophobically modified calcium carbonate particles
    Patent number: 7862685
    Abstract: The present invention provides methods for deinking printed waste paper—particularly methods that use a deinking composition that includes a hydrophobically-modified inorganic particle (“MIP”) to improve ink collection efficiency under traditional alkaline, reduced alkali, and true neutral deinking conditions. Deinking compositions are provided that include a hydrophobically-MIP substrate, a nonionic surfactant, and a fatty acid, or mixtures thereof. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentrations (“ERIC”) values.
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: January 4, 2011
    Assignee: Kemira Chemicals, Inc.
    Inventors: Scott Rosencrance, Charles Ngome, Kevin M. Hale
  • Use of modified inorganic particles in deinking
    Publication number: 20070158039
    Abstract: The present invention provides methods for deinking printed waste paper—particularly methods that use a deinking composition that includes a hydrophobically-modified inorganic particle (“MIP”) to improve ink collection efficiency under traditional alkaline, reduced alkali, and true neutral deinking conditions. Deinking compositions are provided that include a hydrophobically-MIP substrate, a nonionic surfactant, and a fatty acid, or mixtures thereof. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentrations (“ERIC”) values.
    Type: Application
    Filed: January 9, 2006
    Publication date: July 12, 2007
    Applicant: Kemira Chemicals, Inc.
    Inventors: Scott Rosencrance, Charles Ngome, Kevin Hale
  • Deinking blends for use in reduced alkali systems
    Publication number: 20070107859
    Abstract: The present invention relates to methods and compositions for deinking waste paper, optionally in non-alkaline or low-alkaline systems. Deinking compositions are provided that include a blend of an alkoxylated fatty alcohol and a fatty acid. The compositions may further include a second alkoxylated fatty alcohol. The deinking compositions also may include a first non-alkoxylated fatty acid and optionally a second alkoxylated fatty acid. Cationic derivatives such as cationic polymers also may be added to the deinking blend.
    Type: Application
    Filed: January 8, 2007
    Publication date: May 17, 2007
    Applicant: Kemira Chemicals, Inc.
    Inventors: Scott Rosencrance, Charles Ngome
  • Deinking blends for use in reduced alkali systems
    Publication number: 20050098278
    Abstract: The present invention relates to methods and compositions for deinking waste paper, optionally in non-alkaline or low-alkaline systems. Deinking compositions are provided that include a blend of an alkoxylated fatty alcohol and a fatty acid. The compositions may further include a second alkoxylated fatty alcohol. The deinking compositions also may include a first non-alkoxylated fatty acid and optionally a second alkoxylated fatty acid. Cationic derivatives such as cationic polymers also may be added to the deinking blend.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 12, 2005
    Applicant: Kemira Chemicals, Inc.
    Inventors: Scott Rosencrance, Charles Ngome