Patents by Inventor David William Zunker

David William Zunker 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).

  • Patent number: 4011388
    Abstract: Process for the preparation of aqueous homogeneous polymer emulsion which comprises mixing, generally with agitation or under shear conditions, water, surfactant, at least one polymer, e.g., cellulosic compounds, and at least one monomer, e.g., acrylics, methacrylics, styrene, etc., the polymer being soluble in said monomer, to form a dispersion of polymer-monomer particles in water; then subjecting said dispersion to conditions such that the monomer within the particles become polymerized by free radical polymerization thereby forming a substantially homogeneous blend of at least two polymers within the particles of the emulsion. The particles have on the average a diameter of 5 microns or less.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: March 8, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles Vincent Murphy, David William Zunker
  • Patent number: 3953386
    Abstract: Process for the preparation of aqueous homogeneous polymer emulsion which comprises mixing, generally with agitation or under shear conditions, water, surfactant, at least one polymer, e.g., cellulosic compounds, and at least one monomer, e.g., acrylics, methacrylics, styrene, etc., the polymer being soluble in said monomer, to form a dispersion of polymer-monomer particles in water; then subjecting said dispersion to conditions such that the monomer within the particles becomes polymerized by free radical polymerization forming a substantially homogeneous blend of at least two polymers within the particles of the emulsion. The particles have on the average a diameter of 5 microns or less. The aqueous emulsions comprise an aqueous continuous phase and dispersed therein particles having an average diameter of up to 5 microns, the particles being substantially a homogeneous blend of a cellulosic compound e.g.
    Type: Grant
    Filed: July 2, 1974
    Date of Patent: April 27, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles Vincent Murphy, David William Zunker