Patents by Inventor Joseph Kurek

Joseph Kurek 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).

  • Water treatment process
    Patent number: 5591346
    Abstract: A water or wastewater purification process is described for reducing selenium and arsenic concentrations in contaminated water or wastewater streams. Iron loaded cation exchange resins, when contacted with contaminated water or wastewater streams are effective to form immobilized complexes with selenite and arsenate contaminants. The iron loaded resins can be easily regenerated by sequential treatment with acid and a solution of a soluble iron salt.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 7, 1997
    Assignee: Heritage Environmental Services, Inc.
    Inventors: James E. Etzel, Joseph Kurek
  • Water treatment process
    Patent number: 5453201
    Abstract: A water or wastewater purification process is described for reducing selenium and arsenic concentrations in contaminated water or wastewater streams. Iron loaded cation exchange resins, when contacted with contaminated water or wastewater streams are effective to form immobilized complexes with selenite and arsenate contaminants. The iron loaded resins can be easily regenerated by sequential treatment with acid and a solution of a soluble iron salt.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: September 26, 1995
    Assignee: Heritage Environmental Servcies, Inc.
    Inventors: James E. Etzel, Joseph Kurek
  • Process for doping semiconductors
    Patent number: 4187124
    Abstract: A process and apparatus for doping a substrate by ion implantation or discharge. The process comprises the steps of maintaining an electric discharge in an evacuated enclosure containing a gaseous compound of a dopant for creating ions of said dopant; extracting and accelerating a beam of said ions from said atmosphere toward said substrate under a voltage selected for achieving a predetermined doping profile; and circulating said substrate transversely to said beam.
    Type: Grant
    Filed: March 15, 1978
    Date of Patent: February 5, 1980
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Jean-Claude Muller, Jean-Pierre Ponpon, Joseph Kurek, Paul Siffert