Patents by Inventor Chandrashekhar J. Joshi

Chandrashekhar J. Joshi 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).

  • Patent number: 8110988
    Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: February 7, 2012
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Publication number: 20110221341
    Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.
    Type: Application
    Filed: February 15, 2011
    Publication date: September 15, 2011
    Applicant: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 7919923
    Abstract: A plasma lamp and a method of generating light are provided. The plasma lamp may include a lamp body having a dielectric constant greater than about 2 and a power source. The power source is coupled to the lamp body by a feed to provide power to the lamp body. A bulb containing a fill having a first portion and a second portion is provided. The bulb is positioned so that the first portion of the fill is located within the lamp body and the second portion of the fill is located outside of the lamp body. In use, the fill receives at least a portion of the power from the lamp body to form a light-emitting plasma. The volume of the bulb is less than the volume of the lamp body.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: April 5, 2011
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Publication number: 20090167183
    Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.
    Type: Application
    Filed: October 15, 2008
    Publication date: July 2, 2009
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 7498747
    Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: March 3, 2009
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 7391158
    Abstract: A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in at least one lamp chamber in the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: June 24, 2008
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 7362056
    Abstract: A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in at least one lamp chamber in the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: April 22, 2008
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 7362054
    Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: April 22, 2008
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 7362055
    Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: April 22, 2008
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 7358678
    Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: April 15, 2008
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 7348732
    Abstract: A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in at least one lamp chamber in the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: March 25, 2008
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Publication number: 20040155589
    Abstract: A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in at least one lamp chamber in the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.
    Type: Application
    Filed: February 4, 2004
    Publication date: August 12, 2004
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Patent number: 6737809
    Abstract: A dielectric waveguide integrated plasma lamp (DWIPL) with a body consisting essentially of at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A bulb positioned in a cavity within the body contains a gas-fill which when receiving energy from the resonating body forms a light-emitting plasma.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: May 18, 2004
    Assignee: Luxim Corporation
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang
  • Publication number: 20020011802
    Abstract: A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant oscillator.
    Type: Application
    Filed: March 15, 2001
    Publication date: January 31, 2002
    Inventors: Frederick M. Espiau, Chandrashekhar J. Joshi, Yian Chang