Patents by Inventor Brian L. Walchuk

Brian L. Walchuk 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).

  • Cationic or amphoteric copolymers prepared in an inverse emulsion matrix and their use in preparing cellulosic fiber compositions
    Patent number: 7396874
    Abstract: A papermaking method and a composition which utilize, as a drainage aid, a water-soluble cationic or amphoteric copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins' constant (k?) determined in 0.01M NaCl greater than 0.3 and a storage modulus (G?) at 6.3 Hz greater than 50 Pa.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: July 8, 2008
    Assignee: Hercules Incorporated
    Inventors: Martha Hollomon, Brian L. Walchuk, Frank J. Sutman
  • Cationic or amphoteric copolymers prepared in an inverse emulsion matrix and their use in preparing cellulosic fiber compositions
    Publication number: 20040143039
    Abstract: A papermaking method and a composition which utilize, as a drainage aid, a water-soluble cationic or amphoteric copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins' constant (k′) determined in 0.01 M NaCl greater than 0.3 and a storage modulus (G′) at 6.3 Hz greater than 50 Pa.
    Type: Application
    Filed: December 4, 2003
    Publication date: July 22, 2004
    Inventors: Martha Hollomon, Brian L. Walchuk, Frank J. Sutman