Patents by Inventor F. Hersman

F. Hersman 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: 20080093543
    Abstract: A polarizing apparatus has a thermally conductive partitioning system in a polarizing cell. In the polarizing region, this thermally conductive partitioning system serves to prevent the elevation of the temperature of the polarizing cell where laser light is maximally absorbed to perform the polarizing process. By employing this partitioning system, increases in laser power of factors of ten or more can be beneficially utilized to polarize xenon. Accordingly, the polarizing apparatus and the method of polarizing 129Xe achieves higher rates of production.
    Type: Application
    Filed: September 20, 2007
    Publication date: April 24, 2008
    Inventor: F. Hersman
  • Publication number: 20070297477
    Abstract: A system to increase the brightness of, and control gaps in, the light from an external cavity, spectrally narrowed, stack of diode laser bars employing a stepped mirror and transparent plates in the external cavity.
    Type: Application
    Filed: May 31, 2007
    Publication date: December 27, 2007
    Inventor: F. Hersman
  • Publication number: 20050245815
    Abstract: The present invention is a polarizing process involving a number of steps. The first step requires moving a flowing mixture of gas, the gas at least containing a polarizable nuclear species and vapor of at least one alkali metal, with a transport velocity that is not negligible when compared with the natural velocity of diffusive transport. The second step is propagating laser light in a direction, preferably at least partially through a polarizing cell. The next step is directing the flowing gas along a direction generally opposite to the direction of laser light propagation. The next step is containing the flowing gas mixture in the polarizing cell. The final step is immersing the polarizing cell in a magnetic field. These steps can be initiated in any order, although the flowing gas, the propagating laser and the magnetic field immersion must be concurrently active for polarization to occur.
    Type: Application
    Filed: June 9, 2005
    Publication date: November 3, 2005
    Inventors: F. Hersman, Mark Leuschner, Jeannette Carberry
  • Publication number: 20050235693
    Abstract: A method and apparatus for the accumulation of hyperpolarized 129Xe is described. A gas mixture comprising 129Xe is flowed through a heat exchanger tube from the first end to the second end. Concurrently, the outer surface of the heat exchanger tube is controllably refrigerated, beginning with the second end, to a temperature low enough to freeze the 129Xe on the inner surface of the heat exchanger tube.
    Type: Application
    Filed: April 21, 2005
    Publication date: October 27, 2005
    Inventor: F. Hersman