Patents by Inventor Marina Carravetta

Marina Carravetta 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).

  • NMR spectroscopy using spin states with long lifetimes
    Patent number: 7474095
    Abstract: A nuclear magnetic resonance method and apparatus are disclosed. A sample is provided where the nuclear spin Hamiltonian operator of the component molecules of the sample possess one or more symmetry operations. A quasi equilibrium nuclear spin ensemble state in a sample is created. The quasi equilibrium nuclear spin ensemble state includes at least two manifolds of spin states which transform differently under the symmetry operations of the Hamiltonian and the manifolds having different mean nuclear spin populations. The quasi equilibrium nuclear spin ensemble state is allowed to remain for a time of equal to or substantially greater than 3T1, where T1 is the spin lattice relaxation time. The symmetry operation of the Hamiltonian is broken. A sequence of magnetic fields is applied to generate a nuclear magnetic resonance signal from the sample. The nuclear magnetic resonance signal is detected.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: January 6, 2009
    Assignee: University of Southampton
    Inventors: Malcolm Harris Levitt, Marina Carravetta, Ole Gustav Johannessen, Walter Köckenberger
  • Nmr spectroscopy using spin states with long lifetimes
    Publication number: 20070063700
    Abstract: A nuclear magnetic resonance method and apparatus are disclosed. A sample is provided where the nuclear spin Hamiltonian operator of the component molecules of the sample possess one or more symmetry operations. A quasi equilibrium nuclear spin ensemble state in a sample is created. The quasi equilibrium nuclear spin ensemble state includes at least two manifolds of spin states which transform differently under the symmetry operations of the Hamiltonian and the manifolds having different mean nuclear spin populations. The quasi equilibrium nuclear spin ensemble state is allowed to remain for a time of equal to or substantially greater than 3T1, where T1 is the spin lattice relaxation time. The symmetry operation of the Hamiltonian is broken. A sequence of magnetic fields is applied to generate a nuclear magnetic resonance signal from the sample. The nuclear magnetic resonance signal is detected.
    Type: Application
    Filed: July 8, 2004
    Publication date: March 22, 2007
    Inventors: Malcom Levitt, Marina Carravetta, Ole Johannessen, Walter Kockenberger