Patents by Inventor Robert Warren Brown

Robert Warren Brown 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 providing encapsulated toner composition
    Patent number: 4097404
    Abstract: A simplified method of encapsulating toners is provided which comprises polymerization and coacervation resulting in a copolymer encapsulated in an incompatible shell polymer. Toner particles are prepared by mixing a solute polymer in a solvent monomer after which polymerization of the solvent monomer is initiated, resulting in a polymer from the solvent monomer which phase-separates from the solvent monomer to form a solvent-poor phase which eventually comprises the capsule core. The solvent-rich phase then provides the material for the capsule wall.
    Type: Grant
    Filed: January 29, 1973
    Date of Patent: June 27, 1978
    Assignee: Xerox Corporation
    Inventor: Robert Warren Brown