Patents by Inventor Som Tyagi

Som Tyagi 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: 20220125922
    Abstract: A bandage and a method of treating a wound with the bandage is provided. The method includes the steps of applying a photosensitive dye to the wound; covering the wound with a bandage; and applying a light to the dye such that the dye generates a reactive oxygen species.
    Type: Application
    Filed: November 8, 2021
    Publication date: April 28, 2022
    Applicant: STRT LLC
    Inventors: Richard Titlebaum, Som Tyagi
  • Publication number: 20200101161
    Abstract: A bandage and a method of treating a wound with the bandage is provided. The method includes the steps of applying a photosensitive dye to the wound; covering the wound with a bandage; and applying a light to the dye such that the dye generates a reactive oxygen species.
    Type: Application
    Filed: November 25, 2019
    Publication date: April 2, 2020
    Applicant: STRT LLC
    Inventors: Richard Titlebaum, Som Tyagi
  • Patent number: 10136963
    Abstract: A bactericidal insert for introduction into a canal in a tooth during a root canal procedure is provided, along with a method of producing the insert and a method of using the insert in a root canal procedure. The insert is in the form of a carrier having a plurality of pores or interstices. The carrier had been impregnated with a liquid photosensitive dye so that the dye entered the pores or interstices and then the carrier with the liquid photosensitive dye forms a dye-impregnated carrier. The dye-impregnated carrier is configured and adapted for insertion within the canal of the tooth. The carrier, if dried, is adapted to receive a wetting agent to dissolve the dye therein to produce a liquefied dye, which is activatable to produce singlet oxygen within the canal when it is irradiated by light from outside of the tooth.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: November 27, 2018
    Inventors: Richard Titlebaum, Som Tyagi
  • Patent number: 9945785
    Abstract: A method for the formation of flexible surface enhanced Raman spectroscopy substrates with filtering capabilities. The method produces thin flexible substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink which includes stabilized nanoparticles such as silver, gold or copper nanoparticles. The substrates and nanoparticle ink undergo a thermal treatment for an amount of time sufficient to remove liquid vehicle and a substantial portion of the stabilizer. The thermal treatment provides a fractal aggregate nanoparticle layer on the substrate suitable for Raman spectroscopy. Such flexible SERS substrates may be used to detect trace amounts of analyte in large volume samples.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: April 17, 2018
    Assignee: Drexel University
    Inventors: Som Tyagi, Manuel Figueroa
  • Publication number: 20180000559
    Abstract: A bactericidal insert for introduction into a canal in a tooth during a root canal procedure is provided, along with a method of producing the insert and a method of using the insert in a root canal procedure. The insert is in the form of a carrier having a plurality of pores or interstices. The carrier had been impregnated with a liquid photosensitive dye so that the dye entered the pores or interstices and then the carrier with the liquid photosensitive dye forms a dye-impregnated carrier. The dye-impregnated carrier is configured and adapted for insertion within the canal of the tooth. The carrier, if dried, is adapted to receive a wetting agent to dissolve the dye therein to produce a liquefied dye, which is activatable to produce singlet oxygen within the canal when it is irradiated by light from outside of the tooth.
    Type: Application
    Filed: December 21, 2015
    Publication date: January 4, 2018
    Inventors: Richard Titlebaum, Som Tyagi
  • Publication number: 20160161414
    Abstract: A method for the formation of flexible surface enhanced Raman spectroscopy substrates with filtering capabilities. The method produces thin flexible substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink which includes stabilized nanoparticles such as silver, gold or copper nanoparticles. The substrates and nanoparticle ink undergo a thermal treatment for an amount of time sufficient to remove liquid vehicle and a substantial portion of the stabilizer. The thermal treatment provides a fractal aggregate nanoparticle layer on the substrate suitable for Raman spectroscopy. Such flexible SERS substrates may be used to detect trace amounts of analyte in large volume samples.
    Type: Application
    Filed: January 27, 2016
    Publication date: June 9, 2016
    Applicant: Drexel University
    Inventors: Som Tyagi, Manuel Figueroa
  • Patent number: 9278855
    Abstract: A method for the formation of flexible surface enhanced Raman spectroscopy substrates with filtering capabilities. The method produces thin flexible substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink which includes stabilized nanoparticles such as silver, gold or copper nanoparticles. The substrates and nanoparticle ink undergo a thermal treatment for an amount of time sufficient to remove liquid vehicle and a substantial portion of the stabilizer. The thermal treatment provides a fractal aggregate nanoparticle layer on the substrate suitable for Raman spectroscopy. Such flexible SERS substrates may be used to detect trace amounts of analyte in large volume samples.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: March 8, 2016
    Assignee: Drexel University
    Inventors: Som Tyagi, Manuel Figueroa
  • Patent number: 9086380
    Abstract: A method for the formation of surface enhanced Raman scattering substrates. The method produces thin substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink such as silver, gold or copper nanoparticle ink which includes stabilized nanoparticles. The substrates and nanoparticle ink undergo a first step of heating in order to remove liquid vehicle from the ink The substrates and nanoparticles then undergo a second step of heating for an amount of time sufficient to remove a substantial portion of the stabilizer and provide a fractal aggregate nanoparticle layer on the substrate having a certain resistivity or conductivity suitable for Raman scattering. This creates SERS substrates with enhanced amplification properties.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: July 21, 2015
    Assignee: Drexel University
    Inventors: Som Tyagi, Kambiz Pourrezaei
  • Publication number: 20140017448
    Abstract: A method for the formation of surface enhanced Raman scattering substrates. The method produces thin substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink such as silver, gold or copper nanoparticle ink which includes stabilized nanoparticles. The substrates and nanoparticle ink undergo a first step of heating in order to remove liquid vehicle from the ink The substrates and nanoparticles then undergo a second step of heating for an amount of time sufficient to remove a substantial portion of the stabilizer and provide a fractal aggregate nanoparticle layer on the substrate having a certain resistivity or conductivity suitable for Raman scattering. This creates SERS substrates with enhanced amplification properties.
    Type: Application
    Filed: September 13, 2013
    Publication date: January 16, 2014
    Applicant: DREXEL UNIVERSITY
    Inventors: Som TYAGI, Kambiz POURREZAEI
  • Patent number: 8559002
    Abstract: A method for the formation of surface enhanced Raman scattering substrates. The method produces thin substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink such as silver, gold or copper nanoparticle ink which includes stabilized nanoparticles. The substrates and nanoparticle ink undergo a first step of heating in order to remove liquid vehicle from the ink. The substrates and nanoparticles then undergo a second step of heating for an amount of time sufficient to remove a substantial portion of the stabilizer and provide a fractal aggregate nanoparticle layer on the substrate having a certain resistivity or conductivity suitable for Raman scattering. This creates SERS substrates with enhanced amplification properties.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: October 15, 2013
    Assignee: Drexel University
    Inventors: Som Tyagi, Kambiz Pourrezaei
  • Publication number: 20120300203
    Abstract: A method for the formation of flexible surface enhanced Raman spectroscopy substrates with filtering capabilities. The method produces thin flexible substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink which includes stabilized nanoparticles such as silver, gold or copper nanoparticles. The substrates and nanoparticle ink undergo a thermal treatment for an amount of time sufficient to remove liquid vehicle and a substantial portion of the stabilizer. The thermal treatment provides a fractal aggregate nanoparticle layer on the substrate suitable for Raman spectroscopy. Such flexible SERS substrates may be used to detect trace amounts of analyte in large volume samples.
    Type: Application
    Filed: May 25, 2012
    Publication date: November 29, 2012
    Inventors: Som Tyagi, Manuel Figueroa
  • Publication number: 20110026019
    Abstract: A method for the formation of surface enhanced Raman scattering substrates. The method produces thin substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink such as silver, gold or copper nanoparticle ink which includes stabilized nanoparticles. The substrates and nanoparticle ink undergo a first step of heating in order to remove liquid vehicle from the ink. The substrates and nanoparticles then undergo a second step of heating for an amount of time sufficient to remove a substantial portion of the stabilizer and provide a fractal aggregate nanoparticle layer on the substrate having a certain resistivity or conductivity suitable for Raman scattering. This creates SERS substrates with enhanced amplification properties.
    Type: Application
    Filed: March 20, 2009
    Publication date: February 3, 2011
    Applicant: DREXEL UNIVERSITY
    Inventors: Som Tyagi, Kambiz Pourrezaei
  • Publication number: 20100130367
    Abstract: The present invention includes a method of using one or more biomarkers to identify individuals with inflammatory disease using Quantum Dots conjugated to targeting moieties that will specifically bind to biomarker proteins or nucleic acids encoding the biomarker, where detection of the biomarker is associated with the inflammatory disease.
    Type: Application
    Filed: July 11, 2007
    Publication date: May 27, 2010
    Applicant: Drexel University
    Inventors: Sreekant Murthy, Elisabeth S. Papazoglou, Kambiz Pourrezaei, Som Tyagi, Amolkumar Karwa