Patents by Inventor Dhanpat Rai

Dhanpat Rai 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 purifying isosaccharinate
    Patent number: 7790134
    Abstract: A method of purifying isosaccharinate by mixing sodium carbonate, potassium carbonate, sodium hydroxide or potassium hydroxide with calcium isosaccharinate, removing the precipitated calcium carbonate and adjusting the pH to between approximately 4.5 to 5.0 thereby removing excess carbonate and hydroxide to provide an acidic solution containing isosaccharinate.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: September 7, 2010
    Assignee: Sandia Corporation
    Inventors: Dhanpat Rai, Robert C. Moore, Mark D. Tucker