Patents by Inventor Kerrie A. Johnson

Kerrie A. Johnson 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).

  • Method for dewatering paper
    Patent number: 4795531
    Abstract: A method of enhancing the dewatering of paper during the papermaking process which includes adding a low molecular weight cationic coagulant and then colloidal silica and a high molecular weight flocculant.
    Type: Grant
    Filed: September 22, 1987
    Date of Patent: January 3, 1989
    Assignee: Nalco Chemical Company
    Inventors: Samuel C. Sofia, Kerrie A. Johnson, Marla S. Crill, Martin J. Roop, Steven R. Gotberg, Anthony S. Nigrelli, Laurence S. Hutchinson
  • Papermaking aid
    Patent number: 4750974
    Abstract: An improved binder for use in paper-making contains three ingredients, a cationic starch having a degree of substitution of at least 0.01, a high molecular weight anionic polymer having a molecular weight of at least 500,000 and a degree of anionic substitution of at least 0.01, and a dispersed silica having a particle size ranging from between about 1-50 nanometers.
    Type: Grant
    Filed: November 3, 1986
    Date of Patent: June 14, 1988
    Assignee: Nalco Chemical Company
    Inventor: Kerrie A. Johnson
  • Papermaking aid
    Patent number: 4643801
    Abstract: An improved binder for use in paper-making contains three ingredients, a cationic starch having a degree of substitution of at least 0.01, a high molecular weight anionic polymer having a molecular weight of at least 500,000 and a degree of anionic substitution of at least 0.01, and a dispersed silica having a particle size ranging from between about 1-50 nanometers.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: February 17, 1987
    Assignee: Nalco Chemical Company
    Inventor: Kerrie A. Johnson