Patents by Inventor Yelana (Helen) Faynshteyn

Yelana (Helen) Faynshteyn 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).

  • Production of liquid fertilizers by ion exchange
    Patent number: 5944868
    Abstract: Ion exchange is used to make two grades of liquid fertilizer. In the first phase, ammonium thiosulfate (ATS) is contacted with a potassium-containing ion exchange resin to make the liquid fertilizer potassium thiosulfate (KTS) and an ammonium-containing resin. If operated under ambient temperatures, oxidation of any sulfites and the attendant formation of insoluble sulfates is avoided along with the associated fouling costs.The recharge line is operated in parallel to the KTS line. When the ammonium-containing resin is contacted with potassium chloride, the ammonium cations are exchanged for potassium cations and produce an ammonium chloride that can be used as a second liquid fertilizer. If desired, a concentrator can be used to remove water from each fertilizer to increase its concentration of KTS or ammonium chloride.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: August 31, 1999
    Assignee: Tessenderlo Kerley, Inc.
    Inventors: Yelana (Helen) Faynshteyn, Mark Clarkson