Patents by Inventor Herbert S. Curtis

Herbert S. Curtis 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 of producing food grade hydrated lime
    Patent number: 7338649
    Abstract: A method is shown for producing food grade hydrated lime. A source of raw, hydrated lime is first passed through a classification step which divides the raw hydrated lime into a first fine stream and a first coarse stream. The first fine stream is passed through a further separation step and, without being recombined with the first coarse stream is separated out to form a very fine sized product which meets CODEX chemical specifications. The additional separation step may be a wet process and may utilize a hydrocyclone type separator.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: March 4, 2008
    Assignee: Chemical Lime Company
    Inventors: Fred R. Huege, Luis Diaz Chavez, Roger Fawcett, Herbert S. Curtis