Patents by Inventor Chris D. Geddes

Chris D. Geddes 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).

  • Publication number: 20160312174
    Abstract: The present invention provides for lysing systems and methods to rapidly lyse bugs, bacteria, viruses, cells and/or algae in an efficient manner in addition to fragmenting DNA and/or RNA onto smaller pieces. Solutions or gases containing the biological material to be lysed are introduced or pumped (flow) between two or more apexes of metallic triangles with microwave energy focused at the apexes. Subsequently, the rapid heating of fluid between the apexes lyses cells allows for increased collection of the lysate, the inner genetic materials or other components for further purification or isolating thereafter.
    Type: Application
    Filed: April 21, 2016
    Publication date: October 27, 2016
    Inventor: CHRIS D. GEDDES
  • Patent number: 9459212
    Abstract: The present invention provides for mixed metal structures that can be deposited on a substrate or free in solution that exhibit several distinctive properties including a broad wavelength range for enhancing fluorescence signatures. Further, metal surface plasmons can couple and such diphase coupled luminescence signatures create extra plasmon absorption bands. The extra bands allow for a broad range of fluorophores to couple therefore making more generic substrates with wider reaching applications.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: October 4, 2016
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Patent number: 9453797
    Abstract: The present invention provides for metallic nanostructures or nanoburgers comprising a dielectric layer positioned between metallic layers and their use in metal enhanced emissions systems to enhance emissions from fluorophores, including intrinsic and extrinsic; luminophores; bioluminescent species and/or chemiluminescent species. The multilayer nanoburgers exhibit several distinctive properties including significantly enhanced intensity of emissions, decreased lifetime and increased photostability by simply varying the thickness of the dielectric layer while maintaining a constant thickness of the two metallic layers on opposite sides of the dielectric layer.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: September 27, 2016
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Publication number: 20160202183
    Abstract: The present invention provides for excitable molecules positioned near metallic structures, wherein the metallic structures have a particles size from about 1 nm to 1000 nm and wherein the excitable molecules have fluorescence, phosphorescence or alpha-fluorescence emissions that are altered due to positioning near the metal structures. The emission spectra are distorted on either the blue or red edges in a range from 1 to 10 nm thereby changing the color of emissions. Further, the width of the emission spectrum is modified either by narrowing or broadening depending on the material of the metallic structures and type of excitable molecule.
    Type: Application
    Filed: January 13, 2016
    Publication date: July 14, 2016
    Inventor: CHRIS D. GEDDES
  • Patent number: 9339485
    Abstract: The present invention provides for a method to increase the triplet yield of a photosensitizer by the coupling to metal surface plasmons which leads to increased singlet oxygen generation by electric field enhancement or enhanced energy absorption of the photosensitizer. The extent of singlet oxygen enhancement can be tuned for applications in singlet oxygen based clinical therapy by modifying plasmon coupling parameters, such as metallic nanoparticle size and shape, photosensitizer/metallic nanoparticle distance, and the excitation wavelength of the coupling photosensitizer.
    Type: Grant
    Filed: January 27, 2008
    Date of Patent: May 17, 2016
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Publication number: 20160122560
    Abstract: The present invention relates to a method for fabricating a new silver coating/nanoparticle scaffold that significantly enhances the luminescence of near-field fluorophores via the metal enhanced fluorescence phenomenon. The silver coating/nanoparticle scaffold can be used for numerous applications in metal-enhanced fluorescence.
    Type: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Inventors: CHRIS D. GEDDES, ANATOLIY I. DRAGAN
  • Patent number: 9310303
    Abstract: In the present invention, it is demonstrated for the first time, the influence of electrical current on the ability of surface plasmons to amplify fluorescence signatures. An applied direct current across silver island films (SiFs) of low electrical resistance perturbs the fluorescence enhancement of close-proximity fluorophores. For a given applied current, surface plasmons in “just-continuous” low resistance films are sparsely available for fluorophore dipole coupling and hence the enhanced fluorescence is gated as a function of the applied current.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: April 12, 2016
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Patent number: 9244012
    Abstract: The present invention relates to a method for fabricating a new silver coating/nanoparticle scaffold that significantly enhances the luminescence of near-field fluorophores via the metal enhanced fluorescence phenomenon. The silver coating/nanoparticle scaffold can be used for numerous applications in metal-enhanced fluorescence.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: January 26, 2016
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventors: Chris D. Geddes, Anatoliy I. Dragan
  • Patent number: 9217746
    Abstract: The present invention relates to detecting and/or measuring scattering effects due to the aggregating metallic nanostructures or the interaction of plasmonic emissions from approaching metallic nanoparticles. The scattering effects may be measured at different angles, different wavelengths, changes in absorption and/or changes in polarization relative to changes in the distances between nanoparticles.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: December 22, 2015
    Assignee: UNIVERSITY OF MARYLAND BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Patent number: 9170197
    Abstract: The present invention relates to an assay including a surface having silver colloids or islands attached thereto. Attached to the surface and/or silver colloids/islands are polynucleotides which are complimentary to a target polynucleotide sequence. The assay is performed by adding the target polynucleotide sequence to the assay surface and allowing it to hybridize with the capture polynucleotides. Fluorophore-labeled capture polynucleotides are added and hybridize to the target polynucleotide. Bound target polynucleotides are detected by metal enhanced fluorescence.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: October 27, 2015
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventors: Chris D. Geddes, Joseph R. Lakowicz, Leslie W. J. Baillie
  • Patent number: 9075018
    Abstract: The present invention relates to a method of imaging structures and features using plasmonic emissions from metallic surfaces caused by chemiluminescence based chemical and biological reactions wherein imaging of the reactions is enhanced by the use of microwave energy and further enhanced by using metallic geometric structures for spatially and temporally controlling the biological and chemical reactions.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: July 7, 2015
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventors: Chris D. Geddes, Michael Previte
  • Patent number: 9023372
    Abstract: The present invention relates to nanoparticles comprising a metallic core with a surface coating, wherein the coating comprises at least an excitable radiative molecule attached thereto or impregnated therein, and wherein the excitable molecule is positioned at a sufficient distance from metallic core to enhance emissions when excited. The nanoparticles are included in compositions that may be used for surface coatings, cosmetics, assays, flow velocity measurements and targeting of tissue.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: May 5, 2015
    Assignee: University of Maryland
    Inventor: Chris D. Geddes
  • Patent number: 8987004
    Abstract: The present invention relates to affinity biosensing using polarization of light scattering of aggregated noble metallic nanostructures to determine concentration of an analyte in a test sample. This new sensing system utilizes the changes in polarized plasmonic scattering from nanostructures as the nanostructures aggregate due to binding of the analyte to a binding partner attached to the surface of the metallic nanostructure.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: March 24, 2015
    Assignee: University of Maryland, Baltimore County
    Inventor: Chris D. Geddes
  • Patent number: 8980179
    Abstract: The present invention relates to detection of fluorescence, and more particularly, to the use of fluorescent moieties in proximity to metallic surfaces to change the spatial distribution of fluorescence in an angular dependent manner and detecting emissions at a determined optimal detection angle thereby increasing sensitivity of the detection.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: March 17, 2015
    Assignee: University of Maryland, Baltimore County
    Inventor: Chris D. Geddes
  • Patent number: 8906701
    Abstract: The present invention provides for sonication-assisted metal-enhanced fluorescence, luminescence, and/or chemiluminescence assay systems using low-intensity ultrasound waves to significantly reduce the assay time by increasing the kinetic movement of molecules within the system.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: December 9, 2014
    Assignee: University of Maryland, Baltimore County
    Inventor: Chris D. Geddes
  • Patent number: 8886464
    Abstract: The present invention relates to systems and methods using microwave accelerated surface plasmonics for the detection of target species. The system has a metallic surface and the system is exposed to microwave energy for increasing detection time and/or the reaction kinetics of the target species and other interacting participants in the system so that plasmonic emissions from the metallic surface alone or coupled with emissions from a luminescing entity are detected.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: November 11, 2014
    Assignee: University of Maryland, Baltimore County
    Inventors: Chris D. Geddes, Kadir Aslan
  • Publication number: 20140287224
    Abstract: The present invention provides for metallic nanostructures or nanoburgers comprising a dielectric layer positioned between metallic layers and their use in metal enhanced emissions systems to enhance emissions from fluorophores, including intrinsic and extrinsic; luminophores; bioluminescent species and/or chemiluminescent species. The multilayer nanoburgers exhibit several distinctive properties including significantly enhanced intensity of emissions, decreased lifetime and increased photostability by simply varying the thickness of the dielectric layer while maintaining a constant thickness of the two metallic layers on opposite sides of the dielectric layer.
    Type: Application
    Filed: May 13, 2014
    Publication date: September 25, 2014
    Applicant: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: CHRIS D. GEDDES
  • Publication number: 20140256059
    Abstract: The present invention relates to the use of multiple different light emitting molecules that emit different and detectable emission signals to provide systems and methods to detect different target products in a single assay sample, wherein the different light emitting molecules are positioned an optimal distance from metallic particles thereby enhancing emissions. Preferably, the systems and methods further comprise use of either microwave or sonic energy to increase binding reactions, timing of such reactions within the assay sample and reduce background non-specific biological absorption.
    Type: Application
    Filed: May 27, 2014
    Publication date: September 11, 2014
    Inventor: CHRIS D. GEDDES
  • Patent number: 8822228
    Abstract: The present invention relates to a method of producing silver films having large nanoparticles caused by cracking during anaerobic annealing to provide surfaces that exhibit increased metal enhanced fluorescence. Preferably the annealing process is conducted on a silver film having a thickness from about 14 to 17 nm for about an hour at a temperature of approximately 190° C. to about 210° C. resulting in the conversion of the just-continuous films into large particulate films, not readily assessable by other chemical deposition techniques.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: September 2, 2014
    Assignee: University of Maryland, Baltimore County
    Inventor: Chris D. Geddes
  • Publication number: 20140242604
    Abstract: The present invention provides for a system and method to detect low levels of the anthrax protective antigen (PA) exotoxin in biological fluids, wherein the system uses a metal-enhanced fluorescence (MEF)-PA assay in combination with microwave-accelerated PA protein surface absorption. Microwave irradiation rapidly accelerates PA deposition onto the surface adjacent to deposited metallic particles and significantly speeding up the MEF-PA assay and resulting in a total assay run time of less than 40 min with an analytical sensitivity of less than 1 pg/ml PA.
    Type: Application
    Filed: February 24, 2014
    Publication date: August 28, 2014
    Applicant: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: CHRIS D. GEDDES