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).

  • Patent number: 10294451
    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: Grant
    Filed: April 21, 2016
    Date of Patent: May 21, 2019
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Publication number: 20180321232
    Abstract: The present invention relates to surface plasmon-coupled bioluminescence, wherein bioluminescent emission from a bioluminescent chemical reaction couples to surface plasmons in metalized particles thereby enhancing the signal. Importantly, these plasmonic emissions emitted from metallic particles generated without an external excitation source but instead from induced electronically excited states caused by the bioluminescent chemical reaction.
    Type: Application
    Filed: July 6, 2018
    Publication date: November 8, 2018
    Inventor: Chris D. GEDDES
  • Publication number: 20180321150
    Abstract: Systems and methods for determining the osmolarity of a sample are provided. Aspects of the subject methods include contacting a sensing surface of a surface plasmon resonance based sensor with a sample, and generating one or more data sets at at least two wavelengths over a time interval, wherein the data sets are used to determine the osmolarity of the sample. The subject methods find use in determining the osmolarity of a sample, such as a biological sample (e.g., a tear fluid), and in the diagnosis and/or monitoring of various diseases and disorders, such as, e.g., dry eye disease.
    Type: Application
    Filed: November 10, 2016
    Publication date: November 8, 2018
    Inventors: Paul T. GAVARIS, Chris D. GEDDES, Ali H. GHOVANLOU
  • Publication number: 20180263489
    Abstract: Optical sensors, systems and methods of use thereof are provided. Aspects of the subject systems include a sensor having a sensing surface and a configuration that directs a first optical signal to interact with the sensing surface at a first incident angle, and directs a second optical signal to interact with the sensing surface at a second incident angle. The subject sensors, systems and methods find use, e.g., in the diagnosis of dry eye disease.
    Type: Application
    Filed: September 23, 2016
    Publication date: September 20, 2018
    Inventors: Paul T. Gavaris, Chris D. Geddes, Ali H. Ghovanlou, Jay M. Eastman, Zachary M. Eastman
  • Patent number: 10060923
    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: Grant
    Filed: November 3, 2017
    Date of Patent: August 28, 2018
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Publication number: 20180209906
    Abstract: The present invention provides for metallic structures comprising a sulfhydryl or amino-terminated hydrophilic coating to provide a layer of hydrophilic character on the surface of the metallic structures thereby allowing the use of low volumes of aqueous solvents of fluorophores that have the ability to “spread out” across the surfaces of the metallic structures and to provide for a more uniform surface coating of fluorophores attached to or near the metallic structures.
    Type: Application
    Filed: July 22, 2016
    Publication date: July 26, 2018
    Inventor: Chris D. Geddes
  • Patent number: 10024850
    Abstract: The present invention relates to surface plasmon-coupled bioluminescence, wherein bioluminescent emission from a bioluminescent chemical reaction couples to surface plasmons in metallized particles thereby enhancing the signal. Importantly, these plasmonic emissions emitted from metallic particles generated without an external excitation source but instead from induced electronically excited states caused by the bioluminescent chemical reaction.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: July 17, 2018
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Patent number: 10024794
    Abstract: Nickel, iron and palladium thin films thermally evaporated onto glass supports are used to demonstrate surface plasmon coupled fluorescence (SPCF) and surface plasmon couple chemiluminescence (SPCC) over a broad wavelength range (400-800 nm) for potential assays or other detection systems. Nickel, iron and palladium thin films used in SPCF and SPCC convert otherwise isotropic emission into highly directional and polarized emission, an attractive concept for surface assays. The emission angles of detected emissions occur over a 10 degree range for tested emitted wavelengths.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: July 17, 2018
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Publication number: 20180088050
    Abstract: The present invention relates to enhancement of detectable emissions from carbon nanodots or variants thereof by using the techniques of MEF to further enhance carbon nanodot brightness, photostability, and thus, potentially detectability in biological imaging applications by using plasmon supporting materials, such as silver island films and positioning of the carbon nanodots an optimal distance from the plasmon supporting materials.
    Type: Application
    Filed: November 7, 2017
    Publication date: March 29, 2018
    Inventor: Chris D. GEDDES
  • Publication number: 20180088114
    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: November 3, 2017
    Publication date: March 29, 2018
    Inventor: Chris D. GEDDES
  • Patent number: 9829436
    Abstract: The present invention relates to enhancement of detectable emissions from carbon nanodots or variants thereof by using the techniques of MEF to further enhance carbon nanodot brightness, photostability, and thus, potentially detectability in biological imaging applications by using plasmon supporting materials, such as silver island films and positioning of the carbon nanodots an optimal distance from the plasmon supporting materials.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: November 28, 2017
    Inventor: Chris D. Geddes
  • Patent number: 9816990
    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: Grant
    Filed: February 24, 2014
    Date of Patent: November 14, 2017
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Patent number: 9810637
    Abstract: The present invention relates to detection systems and methods that detect fluorescence, luminescence, chemiluminescence or phosphorescence signatures in the form of an electrical signal conducted and emitted from metallic containing surfaces. Thus, the present invention provides for detecting fluorescence digitally and directly without the need for expensive detectors.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: November 7, 2017
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Publication number: 20170299513
    Abstract: The present invention provides for the surface plasmon-enhancement of long lived luminescent compounds, thereby providing for methods and systems having enhanced and controllable rates of the radiative emission of such relaxation of long lived luminescent compounds. The present invention achieves acceleration of the radiative processes by the interaction of the long lived luminescent compounds with surface plasmons of the metal surfaces.
    Type: Application
    Filed: June 29, 2017
    Publication date: October 19, 2017
    Inventor: CHRIS D. GEDDES
  • Patent number: 9784682
    Abstract: The present invention relates to an optical imaging system communicatively connected to a microwave energy producing source wherein the combination provides for increases in chemical reaction times and the ability to monitor the reactions in real time with sufficient resolution to view the location of intracellular components labeled with luminescent molecules as well as interaction with other biomolecules and responses to localized environmental variables in living cells and tissues during the application of a microwave field.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: October 10, 2017
    Assignee: University of Maryland, Baltimore County
    Inventors: Chris D. Geddes, Michael J. R. Previte
  • Patent number: 9719923
    Abstract: The present invention provides for the surface plasmon-enhancement of long lived luminescent compounds, thereby providing for methods and systems having enhanced and controllable rates of the radiative emission of such relaxation of long lived luminescent compounds. The present invention achieves acceleration of the radiative processes by the interaction of the long lived luminescent compounds with surface plasmons of the metal surfaces.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: August 1, 2017
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes
  • Patent number: 9708494
    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: January 12, 2016
    Date of Patent: July 18, 2017
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventors: Chris D. Geddes, Anatoliy I. Dragan
  • Publication number: 20170067828
    Abstract: The present invention provides for the surface plasmon-enhancement of long lived luminescent compounds, thereby providing for methods and systems having enhanced and controllable rates of the radiative emission of such relaxation of long lived luminescent compounds. The present invention achieves acceleration of the radiative processes by the interaction of the long lived luminescent compounds with surface plasmons of the metal surfaces.
    Type: Application
    Filed: May 11, 2011
    Publication date: March 9, 2017
    Inventor: Chris D. Geddes
  • Patent number: 9556474
    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: Grant
    Filed: May 27, 2014
    Date of Patent: January 31, 2017
    Inventor: Chris D. Geddes
  • Patent number: 9500590
    Abstract: The present invention relates to an assay for the determination of a microorganism including a lysing chamber having triangular shaped metallic structures wherein the apexes of two triangles are arranged in alignment and forming a reactive zone for placement of the microorganism and lysing by microwave energy for exposing and isolating a target polynucleotide sequence. The isolated target polynucleotide sequence is introduced to an assay system for contact with polynucleotides which are complimentary to the isolated target polynucleotide sequence. Fluorophore-labeled capture polynucleotides are added for hybridizing to any bound target polynucleotide. Bound target polynucleotides are detected by metal enhanced fluorescence.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: November 22, 2016
    Assignee: UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventor: Chris D. Geddes