Patents by Inventor Mark K. Crescenzi

Mark K. Crescenzi 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 for removing fluoride from water
    Patent number: 5824227
    Abstract: A process for removing dissolved fluorides from an aqueous stream using at least two reactors wherein the dissolved fluoride containing aqueous feed and an unreacted aluminum containing sludge are combined in the first reactor to give a first reactor admixture after which the first reactor effluent stream is directed to the second reactor and therein combined with fresh alum and fresh sodium aluminate to give a second reactor admixture comprising a reduced fluoride aqueous solution and a partially reacted aluminum containing sludge and thereafter recovering the reduced fluoride aqueous solution and recycling at least a portion of the aluminum containing sludge to the first reactor.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: October 20, 1998
    Assignee: WMX Technologies, Inc.
    Inventors: Daniel A. Cargnel, Mark K. Crescenzi