Patents by Inventor David G. Mayes

David G. Mayes 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: 4759838
    Abstract: A container for protecting and enclosing an electrophoretic support medium is disclosed. The container includes a top portion and a bottom portion, which when closed sealingly engage one another to form a substantially air-tight cavity therein. The bottom portion has a recess formed therein for accommodating the support medium and at least a portion of the recess has a substantially smooth planar surface. The bottom recess is defined by a protruding continuous rim which has a plurality of nubs protruding into said recess and engagable with the base sheet of the support medium, whereby the support medium is retained within the recess.
    Type: Grant
    Filed: January 5, 1987
    Date of Patent: July 26, 1988
    Assignee: Helena Laboratories Corporation
    Inventors: David G. Mayes, James R. M. Sanford, Eric H. Petersen
  • Patent number: 4741814
    Abstract: A container for protecting and enclosing an electrophoretic support medium is disclosed. The container includes a first portion and a second portion slidingly engageable with one another, whereby when closed they sealingly engage one another to form a substantially air-tight cavity therein. The first portion has a first recess defined by a protruding rim for accommodating a portion of the support medium therein. The second portion has a second recess defined by a protruding rim for accommodating the remainder of the support medium therein. The protruding rims are spaced apart from the bottoms of each portion and engagable with the base sheet of the support medium, whereby the support medium is retained within the recesses between the rims and the bottoms. The bottoms each have a substantially smooth planar surface to facilitate secure retention of the support medium.
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: May 3, 1988
    Assignee: Helena Laboratories Corporation
    Inventors: David G. Mayes, James R. M. Sanford, Eric H. Petersen
  • Patent number: 4709810
    Abstract: A container for protecting and enclosing an electrophoretic support medium. The container includes a top portion and a bottom portion, which when closed sealingly engage one another. The bottom portion has a recess formed therein for accommodating the support medium and at least a portion of the recess has a substantially smooth planar surface. A liquid disposed between and in contact with the planar surface of the bottom portion and the support medium provides sufficient contact adhesion to securely retain the support medium within the recess.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: December 1, 1987
    Assignee: Helena Laboratories Corporation
    Inventor: David G. Mayes
  • Patent number: 4086372
    Abstract: A method for applying an organic liquid sample such as blood or the like onto an absorbent sample support. The method includes the steps of filling a reservoir with a relatively massive sample, superimposing over the reservoir a sample carrier wettable by the sample and to which the sample adheres by surface tension, then immersing the sample carrier into the sample, withdrawing the sample carrier from the reservoir with the sample adhered to the carrier by surface tension, and, contacting the sample carrier with the sample support to break surface tension between the sample and the sample carrier and to deposit the sample onto the sample support.An apparatus utilizing the method includes a reservoir for receiving a relatively massive sample, a first guide path aligned with the reservoir, and a sample carrier displaceable along said first guide path toward and away from the reservoir with the sample carrier being immersible in the sample.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: April 25, 1978
    Assignee: Helena Laboratories Corporation
    Inventors: Tipton L. Golias, David G. Mayes