Patents by Inventor Michael L. Kochersperger

Michael L. Kochersperger 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: 5656034
    Abstract: A syringe pump particularly adapted for delivery of small volumes at a high pressure in an accurate and reproducible manner. The syringe pump includes a frame, a motor attached to the frame, and a lead screw drivably connected to the motor. A cover seal is mounted to the front end of the lead screw, the cover seal having grooves formed therein to facilitate mounting and demounting of the cover seal. The pump further includes a cylindrical barrel within which the cover seal reciprocates, the barrel being made of a ceramic material, wherein the barrel is fixedly attached to the frame at the front end and floatably mounted to the frame at the back end. A barrel head is mounted to the front end of the barrel for closing off that end of the barrel, the barrel head including an outlet port for allowing fluid to enter and exit the barrel. In addition, the present invention includes a multi-syringe gradient syringe pump, a liquid chromatography system, a cover seal, and a mixer for mixing multiple flow streams.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: August 12, 1997
    Inventors: Michael L. Kochersperger, Reid B. Kowallis, Andrew A. Pham
  • Patent number: 5124041
    Abstract: A filter system for separating and binding biomolecules contained in a solution includes a first filter means for selectively passing components of the solution that are smaller than the biomolecules, thereby concentrating the biomolecules in the solution. Also included is a binding membrane means having an affinity for the biomolecules for binding the biomolecules to the binding membrane means, with the binding membrane means being located where the biomolecules are concentrated by the first filter means. In the preferred mode, the binding membrane means is chosen to selectively bind the biomolecule of interest. According to a preferred method of the invention, biomolecules from a sample volume are bound to a binding membrane by urging the sample volume against a biomolecule-binding support membrane that is in contact with a cut-off filter membrane such that the sample volume will pass through the biomolecule-binding support membrane before passing through the cut-off filter membrane.
    Type: Grant
    Filed: May 1, 1991
    Date of Patent: June 23, 1992
    Assignee: Applied Biosystems, Inc.
    Inventors: Donald G. Sheer, Michael L. Kochersperger