Patents by Inventor Christophoros Vassiliou

Christophoros Vassiliou 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: 20220018915
    Abstract: Systems and methods for generating hyperpolarized target materials are disclosed. The disclosed systems and methods can include hyperpolarizing a compound then transferring polarization to a target material. The compound can be selected to have nuclear spins. The compound can be further selected to have electron spins that, when exposed to certain electromagnetic radiation, exceed a predetermined level of polarization. The compound can be exposed to such electromagnetic radiation, optically hyperpolarizing the electron spins of the compound. Polarization can then be transferred from the electron spins of the compound to nuclear spins of the compound, at least in part by exposing the compound to a magnetic field. The compound can be exposed to the target material before or after pulverizing the compound to increase the surface area of the compound, thereby facilitating transfer of polarization from the compound to the target material.
    Type: Application
    Filed: November 20, 2019
    Publication date: January 20, 2022
    Applicant: Nvision Imaging Technologies GmbH
    Inventors: Ilai SCHWARTZ, Tim Rolf EICHHORN, Christophoros VASSILIOU, Michael KEIM
  • Patent number: 10983184
    Abstract: Polarizable diamond materials and methods for obtaining nuclear magnetic resonance spectra of samples external to the diamond materials are described. The diamond materials can include 12C, 13C, substitutional nitrogen, and nitrogen vacancy defects in a crystalline lattice, wherein the substitutional nitrogen concentration is between 10 ppm and 200 ppm, the nitrogen vacancy concentration is between 10 ppb and 10 ppm, and the 13C concentration is greater than 1.1% and not more than 25%. Methods for obtaining nuclear magnetic resonance spectra can include optically pumping a diamond material to generate electron spin hyperpolarization in nitrogen vacancy centers, transferring the electron spin hyperpolarization to nuclei of the sample, and generating a nuclear magnetic resonance spectrum by applying a magnetic field to the sample, exciting the sample with a radio frequency pulse, and detecting a nuclear magnetic resonance response from the sample.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 20, 2021
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Anna Parker, Jonathan King, Christophoros Vassiliou, Alexander Pines, Claudia Avalos, Birgit Hausmann
  • Publication number: 20180202953
    Abstract: Described herein are techniques and methods for measuring the chemical dynamics of a sample by monitoring the longitudinal and/or transverse relaxation rate of hyperpolarized xenon at low magnetic fields using a rubidium magnetometer.
    Type: Application
    Filed: January 11, 2018
    Publication date: July 19, 2018
    Inventors: Muller Gomes, Phuong Dao, Christophoros Vassiliou, Alexander Pines
  • Publication number: 20180180689
    Abstract: Polarizable diamond materials and methods for obtaining nuclear magnetic resonance spectra of samples external to the diamond materials are described. The diamond materials can include 12C, 13C, substitutional nitrogen, and nitrogen vacancy defects in a crystalline lattice, wherein the substitutional nitrogen concentration is between 10 ppm and 200 ppm, the nitrogen vacancy concentration is between 10 ppb and 10 ppm, and the 13C concentration is greater than 1.1% and not more than 25%. Methods for obtaining nuclear magnetic resonance spectra can include optically pumping a diamond material to generate electron spin hyperpolarization in nitrogen vacancy centers, transferring the electron spin hyperpolarization to nuclei of the sample, and generating a nuclear magnetic resonance spectrum by applying a magnetic field to the sample, exciting the sample with a radio frequency pulse, and detecting a nuclear magnetic resonance response from the sample.
    Type: Application
    Filed: December 21, 2017
    Publication date: June 28, 2018
    Inventors: Anna Parker, Jonathan King, Christophoros Vassiliou, Alexander Pines, Claudia Avalos, Birgit Hausmann
  • Publication number: 20180149606
    Abstract: Described herein is a technique and method for analyzing the protein binding affinity of a drug. The techniques and methods described herein leverage magnetic resonance techniques such as NMR and MRI to make relaxation measurements of an NMR detectable species. In some embodiments, a rubidium polarizer is used to magnetize 129Xe, which is bubbled into a protein solution. The magnetic decay of the hyperpolarized 129Xe is monitored by measuring the T1 or T2 of 129Xe through NMR spectroscopy.
    Type: Application
    Filed: November 21, 2017
    Publication date: May 31, 2018
    Inventors: Muller Gomes, Christophoros Vassiliou, Alex Pines