Patents Assigned to Midwest Research Technologies, Inc.
  • Patent number: 5137827
    Abstract: A method is disclosed for detecting the occurrence of a binding or complex-forming reaction between specific substances by utilizing the binding reaction to modify an electrical circuit, and then measuring a change in the electrical state of the circuit. A diagnostic element useful in such a method includes a layer of a biogenic substance, such as an antigen, coated onto a non-conductive base between a pair of electrical conductors superposed on the base. Antibodies which react with the antigen are treated so that they become bound to fine electrically conductive, metallic particles. The electrically conductive particles having antibody bound thereto are then added to the antigen layer deposited on the base and allowed to react therewith. Electrically conductive particles are thereby bound to the base due to the binding reaction between the antigen and antibody to thereby form aggregates of electrically conductive particles which modify the circuit.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: August 11, 1992
    Assignee: Midwest Research Technologies, Inc.
    Inventors: Susan J. Mroczkowski, Kenneth A. Siegesmund, Donald E. Yorde
  • Patent number: 5061357
    Abstract: A coating of lanthanum hexaboride LaB.sub.6 is sputtered on a substrate, preferably an electrically conductive substrate such as tungsten, in an insert gas atmosphere and at a pressure in the range of 2 to 50.times.10.sup.-3 torr. The coated substrate is subsequently heated to a temperature in the range of 750.degree. C. to 1000.degree. C. in a non-oxidizing atmosphere to provide an adherent, dense, smooth LaB.sub.6 coating on the substrate, suitable for use as an electron beam emission cathode.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: October 29, 1991
    Assignee: Midwest Research Technologies, Inc.
    Inventor: Susan J. Kerber
  • Patent number: 4904542
    Abstract: An erosion and corrosion resistant coating is formed of a plurality of alternating layers of metallic and ceramic materials. The two materials selected for the layers have complementary wear resistant characteristics, such that one is relatively ductile and the other is relatively brittle. The concentration of the two materials at the interface between adjacent layers is graded to improve the adhesion of the layers and to provide a more unified coating. Prefereably radio-frequency sputtering is employed to deposit the coating, since it does not produce excessive heating which could negate any prior heat treatment of the substrate onto which the coating is deposited.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: February 27, 1990
    Assignee: Midwest Research Technologies, Inc.
    Inventor: Susan J. Mroczkowski
  • Patent number: RE34173
    Abstract: An erosion and corrosion resistant coating is formed of a plurality of alternating layers of metallic and ceramic materials. The two materials selected for the layers have complementary wear resistant characteristics, such that one is relatively ductile and the other is relatively brittle. The concentration of the two materials at the interface between adjacent layers is graded to improve the adhesion of the layers and to provide a more unified coating. Preferably radio-frequency sputtering is employed to deposit the coating, since it does not produce excessive heating which could negate any prior heat treatment of the substrate onto which the coating is deposited.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: February 2, 1993
    Assignee: Midwest Research Technologies, Inc.
    Inventor: Susan M. Kerber