Patents by Inventor Jefferson Luis Brotto

Jefferson Luis Brotto 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).

  • Recycled paper production process which incorporates carbon dioxide
    Patent number: 6200416
    Abstract: A method for the manufacture of paper products includes the feeding of a carbon dioxide stream to a product flow which includes a material containing an aluminum compound. The material is preferably wastepaper containing aluminum sulfate or papermaker's alum. The material may also be a product flow of wastepaper (containing aluminum sulfate) to which a supply of virgin pulp has been added. The carbon dioxide addition to the product flow reduces the pH of the product flow to a level of acidity which allows a dissolution of the aluminum compound and incorporation thereof throughout the product flow.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: March 13, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Jefferson Luis Brotto, Douglas Barbosa Madeiros, Alexandre Sayao Valladares, John Allen Slocumb