Patents by Inventor Daniel Bruce Evans

Daniel Bruce Evans 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).

  • Copolymer blend compositions for use to increase paper filler content
    Patent number: 8163134
    Abstract: Methods for making a heterogeneous polymer blend comprising one or more anionic polymers, one or more cationic polymers, and one or more non-ionic polymers, which method comprises (a) adding to a non-neutral solution a first amount of polymerization initiator and one or more anionic or cationic monomers, wherein each monomer has the same charge; (b) adding a second amount of the polymerization initiator and one or more non-ionic monomers; (c) adding a third amount of the polymerization initiator and one or more ionic monomers that are oppositely charged from the monomers of (a); adding stepwise, a fourth amount of the polymerization initiator to react any residual monomer, and (e) neutralizing the resulting polymer blend. Also claimed are heterogeneous polymer blends containing polymers formed from one or more anionic, cationic, and non-ionic monomers, either polymerized in situ or separately and then combined.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: April 24, 2012
    Assignees: Hercules Incorporated, Specialty Minerals (Michigan) Inc.
    Inventors: Frank J. Sutman, Joseph M. Mahoney, Robert Anthony Gill, Daniel Bruce Evans
  • COPOLYMER BLEND COMPOSITIONS FOR USE TO INCREASE PAPER FILLER CONTENT
    Publication number: 20100071863
    Abstract: Methods for making a heterogeneous polymer blend comprising one or more anionic polymers, one or more cationic polymers, and one or more non-ionic polymers, which method comprises (a) adding to a non-neutral solution a first amount of polymerization initiator and one or more anionic or cationic monomers, wherein each monomer has the same charge; (b) adding a second amount of the polymerization initiator and one or more non-ionic monomers; (c) adding a third amount of the polymerization initiator and one or more ionic monomers that are oppositely charged from the monomers of (a); adding stepwise, a fourth amount of the polymerization initiator to react any residual monomer, and (e) neutralizing the resulting polymer blend. Also claimed are heterogeneous polymer blends containing polymers formed from one or more anionic, cationic, and non-ionic monomers, either polymerized in situ or separately and then combined.
    Type: Application
    Filed: September 18, 2009
    Publication date: March 25, 2010
    Applicants: Hercules Inc., Specialty Minerals (Michigan) Inc.
    Inventors: Frank J. Sutman, Joseph M. Mahoney, Robert Anthony Gill, Daniel Bruce Evans