Patents by Inventor Thomas J. Weaver

Thomas J. Weaver 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).

  • In situ precipitation of calcium carbonate (CaCO) by indigenous microorganisms to improve mechanical properties of a geomaterial
    Patent number: 8420362
    Abstract: A method for increasing the concentration of calcium carbonate in a geomaterial that contains indigenous microorganisms capable of hydrolyzing urea to ammonia, which method includes enriching the geomaterial with a source of nutrients, adding urea to the geomaterial which is hydrolyzed to ammonia and which raises the pH of the geomaterial, and adding a source of calcium ions to the geomaterial. Carbonate ions obtained by the hydrolysis of the urea combine with calcium ions to form calcium carbonate.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: April 16, 2013
    Assignee: University of Idaho
    Inventors: Ronald L. Crawford, Malcolm B. Burbank, Thomas J. Weaver, Barbara C. Williams
  • In situ precipitation of calcium carbonate (CaCO3) by indigenous microorganisms to improve mechanical properties of a geomaterial
    Publication number: 20110027850
    Abstract: A method for increasing the concentration of calcium carbonate in a geomaterial that contains indigenous microorganisms capable of hydrolyzing urea to ammonia, which method includes enriching the geomaterial with a source of nutrients, adding urea to the geomaterial which is hydrolyzed to ammonia and which raises the pH of the geomaterial, and adding a source of calcium ions to the geomaterial. Carbonate ions obtained by the hydrolysis of the urea combine with calcium ions to form calcium carbonate.
    Type: Application
    Filed: May 28, 2010
    Publication date: February 3, 2011
    Inventors: Ronald L. Crawford, Malcolm B. Burbank, Thomas J. Weaver, Barbara C. Williams