Patents by Inventor Mark A. Harradine

Mark A. Harradine 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 and apparatus for magnetic separation of particles
    Patent number: 6514416
    Abstract: A method and apparatus for magnetic separation of particles within a container. In one embodiment, a plurality of magnets are arranged in a first row and in a second row on a frame, wherein the plurality of magnets are oriented in a plane coplanar with a horizontal cross sectional plane of the frame. The frame has housing means between the first row and the second row for housing containers. The plurality of magnets apply north-south magnetic fields oriented coplanar with the horizontal cross sectional plane of the frame. The north-south magnetic field direction of a first magnet in the first row alternates 180 degrees from the north-south magnetic field direction of a second magnet in the first row, and the north-south magnetic field direction of a first magnet in the second row opposes the north-south magnetic field direction of the first magnet in the first row.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: February 4, 2003
    Assignee: Dexter Magnetic Technologies, Inc.
    Inventors: Mark A. Harradine, Richard V. Bennett