Patents Assigned to Evident Technologies
  • Patent number: 7804587
    Abstract: A system and method for distinguishing a first light source from other light sources utilizes an image receiver that can selectively engage and disengage a filter. The filter can be configured to either block bands of light corresponding to the light being emitted by either the first source or the other sources. By sequentially engaging and disengaging the filter from the image receiver, the first light source may be distinguished from other light sources.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: September 28, 2010
    Assignee: Evident Technologies, Inc.
    Inventors: Luis A. Sanchez, James Hayes, Clinton T. Ballinger, Eva Sbardella
  • Patent number: 7785657
    Abstract: A first population of semiconductor nanocrystals to create electron transport conduits, a second population so semiconductor nanocrystals to create hole transport conduits; and a third population of semiconductor nanocrystals to be used for either light absorption or light emission can be combined to form an inorganic nanostructure layer.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: August 31, 2010
    Assignee: Evident Technologies, Inc.
    Inventors: Michael LoCascio, San Ming Yang
  • Patent number: 7777870
    Abstract: A system and method for distinguishing a first light source from other light sources utilizes an image receiver that can selectively engage and disengage a filter. The filter can be configured to block bands of light corresponding to the light being emitted by either the first source or the other sources. By alternately engaging and disengaging the filter from the image receiver, the first light source may be distinguished from other light sources.
    Type: Grant
    Filed: January 21, 2008
    Date of Patent: August 17, 2010
    Assignee: Evident Technologies, Inc.
    Inventors: James C. M. Hayes, Luis A. Sanchez, Eva Marie Sackal, Clinton T. Ballinger
  • Patent number: 7754329
    Abstract: A water-stable semiconductor nanocrystal complex and methods of making the same are provided. The water-stable semiconductor nanocrystal complex includes a semiconductor nanocrystal composition, a surfactant layer, and an outer layer. The outer layer and/or the surfactant layer can be cross-linked.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: July 13, 2010
    Assignee: Evident Technologies, Inc.
    Inventors: Wei Liu, Daniel Landry, Michael LoCascio
  • Patent number: 7723744
    Abstract: Light-emitting devices are provided that incorporate one or more underlying LED chips or other light sources and a layer having one or more populations of nanoparticles disposed over the light source. The nanoparticles may absorb some light emitted by the underlying source, and re-emit light at a different level. By varying the type and relative concentration of nanoparticles, different emission spectra may be achieved. White light and specialty-color emission may be achieved. Devices also may include multiple LED chips, with nanoparticles disposed over one or more underlying chips in an array.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: May 25, 2010
    Assignee: Evident Technologies, Inc.
    Inventors: Jennifer Gillies, David Socha, Kwang-Ohk Cheon, Michael LoCasio
  • Patent number: 7524746
    Abstract: A high-refractive index material that includes semiconductor nanocrystal compositions. The high-refractive index material has at least one semiconductor nanocrystal composition incorporated in a matrix material and has a refractive index greater than 1.5. The semiconductor nanocrystal composition has a semiconductor nanocrystal core of a II-VI, III-V, or IV-VI semiconductor material. A method of making a high-refractive index material includes incorporating, at least one semiconductor nanocrystal composition in a matrix material. An application of a high-refractive index material includes incorporating at least one semiconductor nanocrystal composition in a matrix material to form the high-refractive index material and depositing the high-refractive index material on the surface of a lighting device.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: April 28, 2009
    Assignee: Evident Technologies, Inc.
    Inventors: Michael Locascio, Jennifer Gillies, Margaret Hines
  • Patent number: 7482059
    Abstract: A semiconductor nanocrystal complex including a metal layer formed on the outer surface of a semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core and a method for preparing a nanocrystal complex comprising forming a metal layer on a semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core. The metal layer may passivate the surface of the semiconductor nanocrystal core and protect the semiconductor nanocrystal core from the effects of oxidation. Also provided is a semiconductor nanocrystal complex with a shell grown onto the metal layer formed on the semiconductor nanocrystal core. In this embodiment, the metal layer may prevent lattice mismatch between the semiconductor shell and the semiconductor nanocrystal core.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: January 27, 2009
    Assignee: Evident Technologies
    Inventors: Adam Peng, Wei Liu
  • Publication number: 20080237546
    Abstract: A semiconductor nanocrystal composite comprising a semiconductor nanocrystal composition dispersed in an inorganic matrix material and a method of making same are provided. The method includes providing a semiconductor nanocrystal composition having a semiconductor nanocrystal core, providing a surfactant formed on the outer surface of the composition, and replacing the surfactant with an inorganic matrix material. The semiconductor nanocrystal composite emits light having wavelengths between about 1 and about 10 microns.
    Type: Application
    Filed: September 4, 2007
    Publication date: October 2, 2008
    Applicant: Evident Technologies
    Inventors: Michael LoCasio, Jennifer Gillies, Margaret Hines
  • Patent number: 7399429
    Abstract: A semiconductor nanocrystal complex that is stable and has high luminescent quantum yield. The semiconductor nanocrystal complex has a semiconductor nanocrystal core of a III-V semiconductor nanocrystal material. A method of making a semiconductor nanocrystal complex is also provided. The method includes synthesizing a semiconductor nanocrystal core of a III-V semiconductor nanocrystal material, and forming a metal layer on the semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: July 15, 2008
    Assignee: Evident Technologies, Inc.
    Inventors: Wei Liu, Adam Peng, Daniel Landry
  • Publication number: 20080107911
    Abstract: A water-stable semiconductor nanocrystal complex and methods of making the same are provided. The water-stable semiconductor nanocrystal complex includes a semiconductor nanocrystal composition, a surfactant layer, and an outer layer. The outer layer and/or the surfactant layer can be cross-linked.
    Type: Application
    Filed: March 8, 2007
    Publication date: May 8, 2008
    Applicant: Evident Technologies, Inc.
    Inventors: Wei Liu, Daniel Landry, Michael Locascio
  • Patent number: 7341734
    Abstract: A personal care composition that includes a personal care ingredient and semiconductor nanocrystals. A method of protecting at least a portion of a body against ultraviolet radiation by applying a personal care composition is also provided.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: March 11, 2008
    Assignee: Evident Technologies
    Inventors: Jennifer Gillies, Margaret Hines
  • Patent number: 7200302
    Abstract: An optical filter includes a first mirror, a cavity coupled to the first mirror, and a second mirror coupled to the cavity. The first and second mirrors are formed of periodic trenches etched into the surface of a waveguide.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: April 3, 2007
    Assignee: Evident Technologies
    Inventors: Michael LoCascio, Clinton T. Ballinger, Daniel P. Landry
  • Patent number: 7192780
    Abstract: A method of detecting target biological molecules in a target sample is provided. The method includes using spectral, temporal, and polarization characteristics of emitted light from water-stable semiconductor nanocrystal complexes to detect the presence of target biological molecules in a target sample.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: March 20, 2007
    Assignee: Evident Technologies
    Inventors: Wei Liu, Zuoyan Peng, Michael LoCascio
  • Patent number: 7110640
    Abstract: An optical filter that includes a resonator cavity comprised of a saturable absorber material is provided. An input signal waveguide, a non-resonant wavelengths output waveguide, and a resonant wavelength output waveguide are coupled to the cavity. A refractive index of the saturable absorber material is altered so that a resonant wavelength output is directed down the resonant wavelength output waveguide and non-resonant wavelengths are directed down the non-resonant wavelengths output waveguide.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: September 19, 2006
    Assignee: Evident Technologies
    Inventors: Michael LoCascio, Clinton T. Ballinger, Daniel P. Landry, David Depoy
  • Patent number: 7095959
    Abstract: A multiplexing/demultiplexing system has a multiplexor that includes a first plurality of optical switches having a plurality of outputs and a first plurality of optical delay elements coupled to the optical switches. A source of optical light is coupled to the delay elements, and an optical combiner is coupled to the plurality of outputs and a source of framing pulses. A demultiplexor includes a first and second splitter, and a threshold detector coupled to the first splitter. The demultiplexor further includes a second plurality of optical delay elements coupled to the threshold detector, and a second plurality of optical switches coupled to the second splitter and the second plurality of delay elements.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: August 22, 2006
    Assignee: Evident Technologies
    Inventors: Michael LoCascio, Clinton T. Ballinger, Chester A. Pratt, Daniel P. Landry
  • Publication number: 20060014040
    Abstract: A semiconductor nanocrystal complex including a metal layer formed on the outer surface of a semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core and a method for preparing a nanocrystal complex comprising forming a metal layer on a semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core. The metal layer may passivate the surface of the semiconductor nanocrystal core and protect the semiconductor nanocrystal core from the effects of oxidation. Also provided is a semiconductor nanocrystal complex with a shell grown onto the metal layer formed on the semiconductor nanocrystal core. In this embodiment, the metal layer may prevent lattice mismatch between the semiconductor shell and the semiconductor nanocrystal core.
    Type: Application
    Filed: May 10, 2005
    Publication date: January 19, 2006
    Applicant: Evident Technologies, Inc.
    Inventors: Adam Peng, Wei Liu
  • Publication number: 20060001119
    Abstract: A semiconductor nanocrystal complex that is stable and has high luminescent quantum yield. The semiconductor nanocrystal complex has a semiconductor nanocrystal core of a III-V semiconductor nanocrystal material. A method of making a semiconductor nanocrystal complex is also provided. The method includes synthesizing a semiconductor nanocrystal core of a III-V semiconductor nanocrystal material, and forming a metal layer on the semiconductor nanocrystal core after synthesis of the semiconductor nanocrystal core.
    Type: Application
    Filed: May 10, 2005
    Publication date: January 5, 2006
    Applicant: Evident Technologies, Inc.
    Inventors: Wei Liu, Adam Peng, Daniel Landry
  • Patent number: 6872450
    Abstract: A method for preparing water-stable semiconductor nanocrystal complexes that can be stably coupled to tertiary molecules using a self-assembled coating of diblock polymers. The diblock polymers have hydrophilic ends containing hydrophilic functional groups and hydrophobic ends containing hydrophobic functional groups. The diblock polymers are assembled around a semiconductor nanocrystal having a lyophilic surface outer layer. The diblock polymers are further crosslinked via bridging molecules that link adjacent diblock polymers through the hydrophilic functional groups of the hydrophilic ends of the diblock polymers to form a semiconductor nanocrystal complex. The functional groups present on the outer surface of the amphiphilic diblock polymer may serve as attachment sites for coupling tertiary molecules to the semiconductor nanocrystal complex.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: March 29, 2005
    Assignee: Evident Technologies
    Inventors: Wei Liu, Zuoyan Peng, Michael LoCascio
  • Patent number: 6710911
    Abstract: An optical wavelength converter converts an optical input signal having a first wavelength into an optical output signal having a second wavelength. The wavelength converter includes a saturable absorber switch having a control beam waveguide and an input waveguide. The converter further includes a first input coupled to the control beam waveguide and adapted to receive the optical input signal, and a second input coupled to the input waveguide and adapted to receive a second optical signal having the second wavelength from an optical source.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: March 23, 2004
    Assignee: Evident Technologies
    Inventors: Michael LoCascio, Clinton T. Ballinger, Daniel P. Landry
  • Patent number: 6697548
    Abstract: A Fabry-Perot optical switch includes a saturable absorber surrounded by a pair of mirrors. Coupled to the saturable absorber is an input waveguide, an output waveguide, and a control beam waveguide. In the absence of light input to the control beam waveguide, the saturable absorber prevents an input signal on the input waveguide from passing through and being output on the output waveguide, thus placing the switch in an “off” state. In the presence of light input to the control beam waveguide and incident on the saturable absorber, the saturable absorber allows the input signal to pass through and be output on the output waveguide, or be reflected and output on the output waveguide, thus placing the switch in an “on” state.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: February 24, 2004
    Assignee: Evident Technologies
    Inventors: Michael LoCascio, Clinton T. Ballinger, Daniel P. Landry, James E. Raynolds