Patents by Inventor John H. O'Haver

John H. O'Haver 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 and apparatus for producing spherical pellets using molten solid matrices
    Patent number: 7413690
    Abstract: A method and apparatus for forming pellets, the apparatus comprising a column for housing column liquid; column liquid; temperature controlling elements engaging the column and capable of maintaining a first and second temperature in the column liquid, and an injection orifice to introduce the liquid pellet composition to the column liquid.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: August 19, 2008
    Assignee: The University of Mississippi
    Inventors: Sreekhar Cheboyina, John H. O'Haver
  • Particulate amorphous silica associated with thin polymeric film
    Patent number: 5426136
    Abstract: Particulate amorphous silica, surfactant, monomer, and an aqueous solvent are brought into mutual contact so that as equilibrium is approached the concentration of the surfactant in the liquid phase is below, at, or slightly above the critical micelle concentration; the monomer is then polymerized to form polymeric film associated with at least a portion of the surface of the particulate amorphous silica, the polymeric film being (i) homopolymer of an aliphatic monomer or (ii) copolymer of at least two different monomers.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: June 20, 1995
    Assignee: PPG Industries, Inc.
    Inventors: Walter H. Waddell, Larry R. Evans, Jeffrey H. Harwell, John H. O'Haver