Patents by Inventor Otávio Guimarães Decusati

Otávio Guimarães Decusati 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).

  • Manufacturing process for quaternary ammonium tannate, a vegetable coagulating/flocculating agent
    Patent number: 6478986
    Abstract: The present invention refers to a process for preparing a coagulating/flocculating agent comprising the following steps: a) mixing an aldehyde, an ammonium salt, and a mineral acid catalyst in a reaction vat at a temperature below 45° C. in an aqueous medium; b) reacting said mixture by heating said mixture until a colorless liquid is obtained; c) reacting said obtained colorless liquid with an aqueous tannin solution by stirring and heating to obtain a viscous liquid; and d) optionally, atomizing said viscous liquid to obtain a uniformly grained powder.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: November 12, 2002
    Assignee: Tanac S.A.
    Inventors: Luiz Henrique Lamb, Otávio Guimarães Decusati