Patents by Inventor James D. MacDowall

James D. MacDowall 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 granular activated carbon
    Patent number: 5162286
    Abstract: There is described a method of producing activated carbon using the phosphoric acid activation process. The starting material employed is a young carbonaceous vegetable product which is comminuted to form particles having a very small particle size. The particles are then treated with phosphoric acid and carbonized to produce activated carbon. The starting materials are selected to have a concentration of natural binding agent greater than 30% by weight.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: November 10, 1992
    Inventor: James D. MacDowall