Patents by Inventor Chenghuan Ma

Chenghuan Ma 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).

  • Organic-solvent dispersion of fine polysilsesquioxane particle, process for producing the same, aqueous dispersion of fine polysilsesquioxane particle, and process for producing the same
    Patent number: 8088863
    Abstract: An organic-solvent dispersion containing fine polysilsesquioxane particles stably dispersed therein, which is obtained by adjusting the pH of an aqueous dispersion of fine polysilsesquioxane particles to 2 to 9, subsequently adding an organic solvent thereto, and then removing the water from the system; and an aqueous dispersion of fine polysilsesquioxane particles having an appropriate average particle diameter, which is obtained by adjusting the amount of a base catalyst to be used so as to be in a specific range. The process for producing an aqueous dispersion of fine polysilsesquioxane particles having a pH of 2 to 9 with an organic solvent.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: January 3, 2012
    Assignee: Konishi Chemical Ind. Co., Ltd.
    Inventors: Chenghuan Ma, Masamichi Yamamoto, Fumio Oi
  • Organic-Solvent Dispersion of Fine Polysilsesquioxane Particle, Process for Producing the Same, Aqueous Dispersion Polysilsesquioxane Particle, and Process
    Publication number: 20080004359
    Abstract: An organic-solvent dispersion containing fine polysilsesquioxane particles stably dispersed therein, which is obtained by adjusting the pH of an aqueous dispersion of fine polysilsesquioxane particles to 2 to 9, subsequently adding an organic solvent thereto, and then removing the water from the system; and an aqueous dispersion of fine polysilsesquioxane particles having an appropriate average particle diameter, which is obtained by adjusting the amount of a base catalyst to be used so as to be in a specific range. The process for producing an aqueous dispersion of fine polysilsesquioxane particles having a pH of 2 to 9 with an organic solvent.
    Type: Application
    Filed: December 27, 2005
    Publication date: January 3, 2008
    Inventors: Chenghuan Ma, Masamichi Yamamoto, Fumio Oi