Patents by Inventor Loreen D. Ferguson

Loreen D. Ferguson 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).

  • Waste paper treatment process
    Patent number: 5895556
    Abstract: A waste paper treatment process for the recycle and re-use of waste paper, which process comprises treating the waste paper, in a repulper, with a surfactant, in the absence of traditional repulper chemicals such as silicate, caustic and peroxide. The surfactant is preferably a copolymer of ethylene oxide and propylene oxide, and is used in a sufficient concentration to form ink agglomerates. The ink agglomerates are retained on the paper, rather than being removed as in waste paper deinking. The process permits the elimination of normal repulper chemicals, and reduces the amount of ink sludge generated, while providing acceptable brightness levels for the recycled pulp.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: April 20, 1999
    Assignee: ICI Canada Inc.
    Inventors: Loreen D. Ferguson, Terrence J. Blain, Jeanette E. Grant, Christine M. Parent
  • Vesiculated polymer granules and paper made therefrom
    Patent number: 5332473
    Abstract: An alkaline paper comprising polymeric vesiculated granules, calcium carbonate, and fibrous materials. Alkaline papers made according to the present invention have improved physical properties.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: July 26, 1994
    Assignee: ICI Canada Inc.
    Inventor: Loreen D. Ferguson
  • Vesiculated polymer granules
    Patent number: 4917765
    Abstract: Vesiculated granules of cross-linked carboxylated polyester resin prepared by the free radical polymerization of a dispersion of an ethylenically unsaturated monomer, a carboxylated unsaturated polyester resin having an acid value of from 5-50 mg KOH/g and an alkyl acryloyl derivative. Aqueous compositions comprising the granules are used in conjunction with fibrous cellulosic or non-cellulosic materials for the preparation of paper containing the vesiculated polymeric granules dispersed therein. The paper has improved optical opacity.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: April 17, 1990
    Assignee: C-I-L Inc.
    Inventors: Loreen D. Ferguson, Peter C. Hayes, Tadas S. Macas
  • Vesiculated polymer granules
    Patent number: 4826881
    Abstract: Vesiculated granules of cross-linked carboxylated polyester resin prepared by the free radical polymerization of a dispersion of an ethylenically unsaturated monomer, a carboxylated unsaturated polyester resin having an acid value of from 5-50 mg KOH/g and an alkyl acryloyl derivative. Aqueous compositions comprising the granules are used in conjunction with fibrous cellulosic or non-cellulosic materials for the preparation of paper containing the vesiculated polymeric granules dispersed therein. The paper has improved optical opacity.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: May 2, 1989
    Assignee: C-I-L Inc.
    Inventors: Loreen D. Ferguson, Peter C. Hayes, Tadas S. Macas
  • Vesiculated polymer granules
    Patent number: 4808633
    Abstract: Vesiculated granules of cross-linked carboxylated polyester resin prepared by the free radical polymerization of a dispersion of an ethylenically unsaturated monomer, a carboxylated unsaturated polyester resin having an acid value of from 5-50 mg KOH/g and an alkyl acryloyl derivative. Aqueous compositions comprising the granules are used in conjunction with fibrous cellulosic or non-cellulosic materials for the preparation of paper containing the vesiculated polymeric granules dispersed therein. The paper has improved optical opacity.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: February 28, 1989
    Assignee: C-I-L Inc.
    Inventors: Loreen D. Ferguson, Peter C. Hayes, Tadas S. Macas