Patents by Inventor John M. Ryan

John M. Ryan 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).

  • Titanium dioxide dispersions and processes for their production
    Patent number: 4683007
    Abstract: Dispersions of titanium dioxide pigments with improved long-term resistance to pigment settling and precipitation are disclosed. The pigment dispersions are formed by chemically grafting vinyl and/or acrylic polymers to nitrocellulose in dispersions of nitrocellulose and titanium dioxide pigments. Nitrocellulose forms a loose association with titanium dioxide in dispersion. The chemical grafting improves the precipitation and settling resistance of nitrocellulose, and thus the precipitation and settling resistance of the associated titanium dioxide.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: July 28, 1987
    Assignee: Forsythe Cosmetic Group, Ltd.
    Inventors: Carl Horowitz, John M. Ryan, Mohan L. Sanduja, Kenneth K. Sugathan, Paulose P. Thottathil