Patents by Inventor Michael D. Cummings

Michael D. Cummings 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 sample shaper
    Patent number: 5302900
    Abstract: Improved NMR sample tube shapes and inserts for standard tubes to shape the sample for greater homogeneity to provide symmetry of liquid sample and tube to a greater distance from the observe region for the same volume of sample as used in the prior art.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: April 12, 1994
    Assignee: Varian Associates Inc.
    Inventor: Michael D. Cummings
  • NMR probe
    Patent number: 5262727
    Abstract: An NMR probe having RF shield means to confine the RF magnetic field to an axial region having a length less than the length of the coil form.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: November 16, 1993
    Assignee: Varian Associates, Inc.
    Inventors: Ali Behbin, Michael D. Cummings
  • NMR probe incorporating RF shielding of sample
    Patent number: 5192911
    Abstract: Parasitic excitation of an NMR sample is minimized by providing shielding of the sample against RF pick-up from coil leads or like proximate conductive structure in the interior region of the RF coil.
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: March 9, 1993
    Assignee: Varian Associates, Inc.
    Inventors: Howard D. W. Hill, Michael D. Cummings