Patents by Inventor Geoffrey Fielding

Geoffrey Fielding 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).

  • Method for synthesis of colloidal nanoparticles
    Patent number: 7615169
    Abstract: A method for synthesis of high quality colloidal nanoparticles using comprises a high heating rate process. Irradiation of single mode, high power, microwave is a particularly well suited technique to realize high quality semiconductor nanoparticles. The use of microwave radiation effectively automates the synthesis, and more importantly, permits the use of a continuous flow microwave reactor for commercial preparation of the high quality colloidal nanoparticles.
    Type: Grant
    Filed: September 20, 2004
    Date of Patent: November 10, 2009
    Assignee: The Regents of the University of California
    Inventors: Geoffrey Fielding Strouse, Jeffrey A. Gerbec, Donny Magana
  • Method for synthesis of colloidal nanoparticles
    Patent number: 7575699
    Abstract: A method for synthesis of high quality colloidal nanoparticles using comprises a high heating rate process. Irradiation of single mode, high power, microwave is a particularly well suited technique to realize high quality semiconductor nanoparticles. The use of microwave radiation effectively automates the synthesis, and more importantly, permits the use of a continuous flow microwave reactor for commercial preparation of the high quality colloidal nanoparticles.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: August 18, 2009
    Assignee: The Regents of the University of California
    Inventors: Geoffrey Fielding Strouse, Jeffrey A. Gerbec, Donny Magana
  • Systems for transmitting information in an alternating current electricity supply system
    Patent number: 4254403
    Abstract: A system for transmitting information in an alternating current supply system wherein information is transmitted by reducing the instantaneous value of the supply voltage during a corresponding period in each of a selection of cycles of the supply voltage, the selection of cycles determining the information transmitted. To minimize disturbance of the system voltage the period of alteration includes a voltage zero. The alteration is effected by closing a switch connected across the system for the period the voltage reduction is required.
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: March 3, 1981
    Assignee: The General Electric Company Limited
    Inventors: Leonardo Perez-Cavero, Michael W. A. Cross, Geoffrey Fielding, Frederick M. Gray