Patents by Inventor John W. Hook, III

John W. Hook, III 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).

  • Process for improving hiding efficiency in pigmented paints
    Patent number: 9518192
    Abstract: The present invention relates to a process comprising the steps of a) contacting an aqueous dispersion of a TiO2 slurry containing adsorbing dispersant with an adsorbing latex to form a mixture, wherein the pH of the mixture of the TiO2 slurry and adsorbing latex are sufficiently high to inhibit interaction between the TiO2 and the adsorbing latex; then b) lowering the pH of the mixture of step a) sufficiently to promote interaction between the TiO2 and the adsorbing latex, thereby forming a composite. The process of the present invention provides for improved hiding and reduced grit for coatings compositions.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: December 13, 2016
    Assignee: Rohm and Haas Company
    Inventors: James C. Bohling, Deborah G. Fradkin, Wei Gao, John W. Hook, III, Tao Wang, Tao Wang
  • PROCESS FOR IMPROVING HIDING EFFICIENCY IN PIGMENTED PAINTS
    Publication number: 20150025172
    Abstract: The present invention relates to a process comprising the steps of a) contacting an aqueous dispersion of a TiO2 slurry containing adsorbing dispersant with an adsorbing latex to form a mixture, wherein the pH of the mixture of the TiO2 slurry and adsorbing latex are sufficiently high to inhibit interaction between the TiO2 and the adsorbing latex; then b) lowering the pH of the mixture of step a) sufficiently to promote interaction between the TiO2 and the adsorbing latex, thereby forming a composite. The process of the present invention provides for improved hiding and reduced grit for coatings compositions.
    Type: Application
    Filed: July 5, 2011
    Publication date: January 22, 2015
    Inventors: James C. Bohling, Deborah G. Fradkin, Wei Gao, John W. Hook, III, Tao Wang, Tao Wang
  • Process for preparing large dimension emulsion polymer particles, polymer product and uses thereof
    Patent number: 5369163
    Abstract: A process for preparing large dimension emulsion polymer particles and the polymer products of the process are disclosed. In one embodiment, the invention provides particles having a high aspect ratio, having a shape described by a long axis and an intersecting short axis. These particles range in shape from egg-like, through rod-like, up to extended filaments. In another embodiment, the invention relates to large, nearly spherical emulsion polymer particles.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: November 29, 1994
    Assignee: Rohm and Haas Company
    Inventors: Shang-Jaw Chiou, Miao-Hsun L. Sheng, John W. Hook, III, Travis E. Stevens