Patents by Inventor Jerald K. Rassmussen

Jerald K. Rassmussen 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 of isolating and purifying a biomacromolecule
    Patent number: 5468847
    Abstract: The invention provides a method of separating a biomacromolecule which comprises the steps of providing a separation system including a filter element which comprises a composite filtration medium, the composite filtration medium comprising a filtration layer on the upstream surface of which are located insoluble stationary phase particulates, the particulates being capable of binding to a biomacromolecule or class of biomacromolecules, a reservoir containing a solution mixture comprising at least one biomacromolecule as solute, and a pump and associated tubing to form a closed loop assembly, and recirculation pumping the solution mixture through the filter cartridge so as to bind the at least one biomacromolecule to the stationary phase particulate so as to form a biomacromolecule:stationary phase particulate product.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: November 21, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven M. Heilmann, Gary J. Drtina, Philip D. Eitzman, Louis C. Haddad, Frederick W. Hyde, Todd W. Johnson, Jerald K. Rassmussen, Michael G. Williams