Patents by Inventor Thomas A. Frenkiel

Thomas A. Frenkiel 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: 4470014
    Abstract: In a method of heteronuclear decoupling in high resolution pulsed NMR spectroscopy, during acquisition of signals emanating from a nuclear species to be observed (e.g. carbon-13), irradiation of an interfering nuclear species (e.g. protons) is effected by means of a train of composite pulses, each of which approximately inverts the longitudinal magnetization. The pulses are of two types respectively having opposite r.f. phases, and the train constitutes a repeated sequence which consists of 2.sup.N+1 pulses of each type (where N is a positive integer) and which has a form chosen in accordance with specific rules to ensure effective decoupling.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: September 4, 1984
    Assignee: National Research Development Corporation
    Inventors: Malcolm H. Levitt, Thomas A. Frenkiel