Patents by Inventor Charles J. Schell

Charles J. Schell 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).

  • Zinc, iron and manganese stabilization using polyether polyamino methylene phosphonates
    Patent number: 5262061
    Abstract: Polyether polyamino methylene phosphonates, when added to various industrial water systems in concentrations between 0.1 mg/L and 50 mg/L, stabilize soluble zinc, manganese and iron ions and their reaction products, in desirable forms and reduced particle sizes. In particular, this stabilization can be achieved under severe conditions which include elevated pH, high dissolved solids content, and high saturation levels of calcium carbonate.
    Type: Grant
    Filed: July 1, 1992
    Date of Patent: November 16, 1993
    Assignee: Calgon Corporation
    Inventors: Jasbir S. Gill, Charles J. Schell, Nancy S. Sherwood
  • Method for stabilizing metal ions in the presence of biofouling organisms
    Patent number: 5128045
    Abstract: A method for stabilizing metal ions in recirculating water systems is disclosed. This method utilizes an admixture comprising a) an ethylenically unsaturated water-soluble polymer and/or a water soluble phosphonate, b) methylene bis(thiocyanate), and c) 2-(thiocyanomethylthio)benzothiazole to solubilize metal ions thereby reducing deposition and corrosion.
    Type: Grant
    Filed: November 20, 1990
    Date of Patent: July 7, 1992
    Assignee: Calgon Corporation
    Inventors: Jennifer R. Parsons, Beverly Bendiksen, Charles J. Schell