Patents by Inventor James D. McSweeny

James D. McSweeny 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 producing salts of monoperoxysulfuric acid and simultaneously bleaching pulp
    Patent number: 4756800
    Abstract: A method of producing salts of monoperoxysulfuric acid comprising reacting together, in the presence of a catalyst consisting of cupric ions in a concentration of at least 0.01 part per milion, (a) a solution of aerated water having a pH of from about 8 to about 14, and (b) a sulfur-containing reactant, wherein said reactant comprises sulfur dioxide or a sulfite. If a pulp is added to the reaction mixture and the cupric ion concentration is increased, the monoperoxysulfuric acid salts that are genrated in situ in the reaction mixture will simultaneously bleach the pulp.
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: July 12, 1988
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Edward L. Springer, James D. McSweeny