Patents by Inventor John D. Rafter

John D. Rafter 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).

  • Silver self-regulating water purification compositions and methods
    Patent number: 6254894
    Abstract: The present invention relates to water purification compositions comprising silver and a second material, such as aluminum or zinc metal, to methods of treating or purifying water using this composition.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: July 3, 2001
    Assignee: Zodiac Pool Care, Inc.
    Inventors: Raymond P. Denkewicz, Jr., John D. Rafter, Mark A. Bollinger, Joseph W. Grenier, Therese R. Souza
  • Water purifier for a spa
    Patent number: 6165358
    Abstract: A water purifier includes a housing that contains a purification material for purifying the water. The water purifier is placed a flow of circulating water in the spa. The purification material preferably can be a silver-containing material.
    Type: Grant
    Filed: July 26, 1999
    Date of Patent: December 26, 2000
    Assignee: Zodiac Pool Care, Inc.
    Inventors: Raymond P. Denkewicz, Jr., John D. Rafter, Mark A. Bollinger
  • Water purifier for a spa
    Patent number: 6019893
    Abstract: A water purifier includes a housing that contains a purification material for purifying the water. The water purifier is placed a flow of circulating water in the spa. The purification material preferably can be a silver-containing material.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: February 1, 2000
    Assignee: Fountainhead Technologies, Inc.
    Inventors: Raymond P. Denkewicz, Jr., John D. Rafter, Mark A. Bollinger
  • Self-regulating water purification composition
    Patent number: 5935609
    Abstract: The invention relates to a water purification composition including silver metal and a second metal. The second metal is relatively reducing and helps control the overall silver cation concentration in solution. The composition effectively disinfects and removes toxic metal ions from water.
    Type: Grant
    Filed: February 24, 1998
    Date of Patent: August 10, 1999
    Assignee: Fountainhead Technologies
    Inventors: Raymond P. Denkewicz, Jr., John D. Rafter, Mark A. Bollinger
  • Method of water purification with oxides of chlorine
    Patent number: 5858246
    Abstract: A method of purifying water includes contacting water containing an oxide of chlorine, such as chlorine dioxide, chlorite, or chlorate, with a water purification composition that includes a Group 11 or Group 12 metal such as silver, copper, or zinc.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: January 12, 1999
    Assignee: Fountainhead Technologies, Inc.
    Inventors: John D. Rafter, Joseph W. Grenier, Raymond P. Denkewicz, Jr.
  • Water purifier for a spa
    Patent number: 5779913
    Abstract: A water purifier includes a housing that contains a purification material for purifying the water. The water purifier is placed a flow of circulating water in the spa. The purification material preferably can be a silver-containing material.
    Type: Grant
    Filed: August 1, 1996
    Date of Patent: July 14, 1998
    Assignee: Fountainhead Technologies, Inc.
    Inventors: Raymond P. Denkewicz, Jr., John D. Rafter, Mark A. Bollinger
  • Self-regulating water purification composition
    Patent number: 5772896
    Abstract: The invention relates to a water purification composition including silver metal and a second metal. The second metal is relatively reducing and helps control the overall silver cation concentration in solution. The composition effectively disinfects and removes toxic metal ions from water.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: June 30, 1998
    Assignee: Fountainhead Technologies
    Inventors: Raymond P. Denkewicz, Jr., John D. Rafter, Mark A. Bollinger