Patents by Inventor Donald T. Roth

Donald T. Roth 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: 5722470
    Abstract: The invention provides methods and apparatus for transporting articles held within a liquid medium from one location to another. Apparatus according to the invention comprise a hopper having a top end, a bottom end, and at least one side wall extending therebetween. The bottom end includes an opening therein, and the hopper is adapted to receive the articles and the liquid medium. A means is provided for injecting an amount of the liquid medium into the hopper to fluidize the articles while held within the liquid medium. The apparatus further includes a container which may be aligned with the opening at the bottom end of the hopper. The container is sized to receive a known quantity of at least one of the articles.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: March 3, 1998
    Assignee: Glaxo Group Limited
    Inventors: Haim Kedar, Robert M. Gavin, Jeffrey H. Sugarman, Donald T. Roth
  • Patent number: 5655560
    Abstract: In an exemplary aspect, the invention provides a fluid distribution system including a first fluid path, and a second fluid path that is laterally spaced-apart from the first fluid path. A third fluid path connects the first and the second fluid paths. A valve is provided that is axially translatable through a third fluid path between a first position and a second position. In a first position, the valve is removed from the third fluid path, and in the second position, the valve substantially fills the third fluid path.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: August 12, 1997
    Assignee: Affymax Technologies N.V.
    Inventors: Haim Kedar, Donald T. Roth