Patents by Inventor Robert Craw

Robert Craw 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).

  • SYSTEM AND METHOD OF FILTERING USING STRATIFIED ACTIVATED CARBON
    Publication number: 20090057228
    Abstract: A stratified bed of activated carbon having regions of functionalized and non-functionalized activated carbon can be utilized to remove contaminants from fluids such as groundwater. The functionalized region has activated carbon particles comprising a cationic or anionic compound that can remove organic or inorganic anionic or cationic compounds from the fluid to be treated. The non-functionalized region comprises powdered or granular activated carbon or adsorbent media downstream of the functionalized region and captures any leaching species or compounds from the functionalized region.
    Type: Application
    Filed: August 29, 2007
    Publication date: March 5, 2009
    Applicant: SIEMENS WATER TECHNOLOGIES CORP.
    Inventors: James R. Graham, Robert Craw