Patents by Inventor George J. Kubes

George J. Kubes 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).

  • Pulping with an alkaline liquor containing a cyclic keto compound and an amino compound
    Patent number: 4248663
    Abstract: Lignocellulosic materials such as wood, bagasse, straw, reeds, and other plants and crops can be delignified effectively by a soda-type pulping with an alkaline liquor containing small quantities of both ethylenediamine or like amino compound, and a cyclic keto compound, such as anthraquinone. Pulping rates comparable to kraft are achieved and the pulps thereby obtained have excellent physical properties, especially tear strength.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: February 3, 1981
    Assignee: Pulp and Paper Research Institute of Canada
    Inventors: George J. Kubes, James M. MacLeod, Bruce I. Fleming, Henry I. Bolker