Patents by Inventor Joseph Darryl Michael

Joseph Darryl Michael 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).

  • Electrodeless discharge system for ultraviolet water purification
    Patent number: 6162406
    Abstract: Water is disinfected by causing the water to flow around an electrodeless low pressure mercury discharge lamp having high ultraviolet transmission properties.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: December 19, 2000
    Assignee: General Electric Company
    Inventor: Joseph Darryl Michael
  • Electrodeless fluorescent lamp
    Patent number: 5959405
    Abstract: An electrodeless fluorescent lamp having an envelope with an improved shape. The invented shape is shorter and the light-trapping area near the neck is substantially reduced or eliminated. The ratio of the operational width to the operational height of the envelope is preferably at least 1.5 and the reflector face angle is preferably less than 40.degree..
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: September 28, 1999
    Assignee: General Electric Company
    Inventors: Thomas F. Soules, Joseph Darryl Michael, David O. Wharmby
  • Compact electrodeless fluorescent A-line lamp
    Patent number: 5952792
    Abstract: A compact electrodeless fluorescent lamp has an A-line configuration including a globular upper portion which becomes narrower toward a lower portion, terminating in a narrow end. The narrow end of the A-line envelope is connected to a base. The alternating current energy source is electrically connected through the base, via a ballast, to the excitation coil. The ballast is integral with the lamp and is contained substantially within the re-entrant cavity.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: September 14, 1999
    Assignee: General Electric Company
    Inventors: Joseph Christopher Borowiec, Joseph Darryl Michael
  • Amalgam Positioning in an electrodeless fluorescent lamp
    Patent number: 5789855
    Abstract: An electrodeless fluorescent reflector lamp has a discharge vessel containing a fill, a solenoid in a reentrant and indium on the inner wall of the vessel acting as a primary amalgam. A secondary amalgam of indium may be provided on the reentrant.The primary amalgam is preferably under an insulative skirt. The vessel has a light reflective coating on the inner wall under the skirt.The exhaust tube is tipped off at the proximal end of the reentrant or is omitted, the vessel being tipped off at the distal end of the reentrant.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: August 4, 1998
    Assignee: General Electric Company
    Inventors: Graham Malcolm Forsdyke, Joseph Darryl Michael, Steven John Everest, Joseph Christopher Borowiec, Zoltan Toth