Patents by Inventor Hugh Albert Sandry Stephens

Hugh Albert Sandry Stephens 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 reducing density by means of gas generating agent
    Patent number: 6887323
    Abstract: This invention relates to a method of reducing density in an ammonium nitrate product. The method comprises providing a gas generating agent in the form of a water-insoluble solid compound capable of generating gas by chemical reaction and providing an ammonium nitrate product. The water-insoluble solid gas generating agent is introduction into the ammonium nitrate product under conditions causing gas generation by the gas generating agent in the ammonium nitrate product. The ammonium nitrate product is particulated to form a particulated prilled ammonium nitrate product with reduced density. The invention also relates to a particulated ammonium nitrate product produced by this method and to the use of a gas generating agent in the form of a water-insoluble solid compound reduce density in a particulate ammonium nitrate product.
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: May 3, 2005
    Assignee: Sasol Chemistry Industries Limited
    Inventors: Jacobus Breedt, Hugh Albert Sandry Stephens, William Luciano Spiteri, Edwin Bals