Patents by Inventor Richard William Farmer

Richard William Farmer 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).

  • Filter for purifying domestic drinking water
    Patent number: 6475386
    Abstract: An improved filter is provided for lowering levels of contaminants in domestic drinking water. The filter contains an oxidized activated carbon and at least one other type of adsorbent to remove cationic species and at least one other contaminant. The filter further achieves an efficient use of the adsorbents by including an envelope containing part or all of the adsorbents, which envelope minimizes the potential for flow by-pass.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: November 5, 2002
    Assignee: Calgon Carbon Corporation
    Inventors: Charles Joseph Carr, Richard William Farmer