Patents by Inventor Fredrick Makau

Fredrick Makau 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).

  • Porous silica coated inkjet recording material
    Patent number: 7906188
    Abstract: A method of treating silica in an aqueous environment includes dispersing silica particulates in an aqueous environment to form an aqueous dispersion, reversing a net charge of a surface of the silica particulates from negative to positive using an inorganic treating agent to form surface-activated silica particulates, and contacting the surface-activated silica particulates with monoaminoorganosilane reagents to form reagent-modified and surface-activated silica particulates.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: March 15, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Yubai Bi, Sandeep Bangaru, Fredrick Makau, Yves-Michel Tricot
  • Porous silica coated inkjet recording material
    Publication number: 20060062941
    Abstract: A method of treating silica in an aqueous environment includes dispersing silica particulates in an aqueous environment to form an aqueous dispersion, reversing a net charge of a surface of the silica particulates from negative to positive using an inorganic treating agent to form surface-activated silica particulates, and contacting the surface-activated silica particulates with monoaminoorganosilane reagents to form reagent-modified and surface-activated silica particulates.
    Type: Application
    Filed: October 24, 2005
    Publication date: March 23, 2006
    Inventors: Yubai Bi, Sandeep Bangaru, Fredrick Makau