Patents by Inventor Michael Robert Johnston

Michael Robert Johnston 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).

  • Dialysis device with access port
    Patent number: 8007668
    Abstract: A device for dialysis of a sample includes a sample chamber formed by a gasket and dialysis membranes affixed to each side of the gasket in facing relationship. A housing supports the dialysis membranes and gasket. An air chamber causes the device to float in a generally upright position when the device is immersed in a dialysate. An access port is provided through the gasket and between the dialysis membranes. The access port is accessible from outside the housing and in communication with the sample chamber such that a dispensing end of a dispensing device can be inserted through the access port to dispense sample into the sample chamber. In one embodiment, the gasket is impermeable or essentially impermeable to the sample being dialyzed.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: August 30, 2011
    Assignee: Pierce Biotechnology, Inc.
    Inventors: Paul J. Haney, Michael Robert Johnston
  • DIALYSIS DEVICE WITH ACCESS PORT
    Publication number: 20090200225
    Abstract: A device for dialysis of a sample includes a sample chamber formed by a gasket and dialysis membranes affixed to each side of the gasket in facing relationship. A housing supports the dialysis membranes and gasket. An air chamber causes the device to float in a generally upright position when the device is immersed in a dialysate. An access port is provided through the gasket and between the dialysis membranes. The access port is accessible from outside the housing and in communication with the sample chamber such that a dispensing end of a dispensing device can be inserted through the access port to dispense sample into the sample chamber. In one embodiment, the gasket is impermeable or essentially impermeable to the sample being dialyzed.
    Type: Application
    Filed: February 5, 2009
    Publication date: August 13, 2009
    Applicant: PIERCE BIOTECHNOLOGY, INC.
    Inventors: Paul J. Haney, Michael Robert Johnston