Patents by Inventor Julie F. Hoffman

Julie F. Hoffman 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 and instrument for automatically performing analysis relating to thrombosis and hemostasis
    Patent number: 5646046
    Abstract: This invention relates to a novel, fully automated spectrophotometric analyzer and method used for testing blood samples in the clinical laboratory for thrombosis and hemostasis properties. The analyzer tests samples in a fully randomized format, and is fully automated in the areas of specimen handling, sample preparation, optical inspection, data analysis and total quality control for imprecision and bias.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: July 8, 1997
    Assignee: AKZO Nobel N.V.
    Inventors: Timothy J. Fischer, Janet B. Callahan, Paul Joseph Braun, Thomas Beecher Givens, Julie F. Hoffman, William Chester Hulette, John Glenn Link, Charles Hermas Swope
  • Direct fibrinogen assay
    Patent number: 5223437
    Abstract: An endpoint assay for measuring fibrinogen utilizing strong thrombin and weak plasma. In a preferred embodiment the assay is based on the direct conversion of a normalized signal from a sensor to fibrinogen concentration.
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: June 29, 1993
    Assignee: Akzo N.V.
    Inventors: Julie F. Hoffman, Janet B. Callahan, C. Hermas Swope
  • Apparatus and method for cleaning reagent delivery probes
    Patent number: 5133373
    Abstract: A cleaning apparatus for cleaning delivery probes used for dispensing protein-containing reagents. The apparatus includes: a bath of a cleaning solution for a protein-containing reagent; a device for lowering the probe into the cleaning solution for aspirating cleaning solution into the probe and for coating the outside of the probe; a device for raising the probe from the cleaning solution; a device for forcing primer liquid through the probe for expelling aspirated cleaning solution followed by primer liquid from the probe for washing the inside of the probe; and a device for deflecting cleaning solution and primer liquid expelled from the probe onto the outside of the probe for washing the outside of the probe.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: July 28, 1992
    Assignee: AKZO N.V.
    Inventors: Julie F. Hoffman, Lionel E. Jones
  • Method for cleaning reagent delivery probes
    Patent number: 5066336
    Abstract: A cleaning apparatus for cleaning delivery probes used for dispensing protein-containing reagents. The apparatus includes: a bath of a cleaning solution for a protein-containing reagent; a device for lowering the probe into the cleaning solution for aspirating cleaning solution into the probe and for coating the outside of the probe; a device for raising the probe from the cleaning solution; a device for forcing primer liquid through the probe for expelling aspirated cleaning solution followed by primer liquid from the probe for washing the inside of the probe; and a device for deflecting cleaning solution and primer liquid expelled from the probe onto the outside of the probe for washing the outside of the probe.
    Type: Grant
    Filed: September 29, 1990
    Date of Patent: November 19, 1991
    Assignee: Akzo N.V.
    Inventors: Julie F. Hoffman, Lionel D. Jones, II
  • Apparatus and method for cleaning reagent delivery probes
    Patent number: 4989623
    Abstract: A cleaning apparatus for cleaning delivery probes used for dispensing protein-containing reagents. The apparatus includes: a bath of a cleaning solution for a protein-containing reagent; a device for lowering the probe into the cleaning solution for aspirating cleaning solution into the probe and for coating the outside of the probe; a device for raising the probe from the cleaning solution; a device for forcing primer liquid through the probe for expelling aspirated cleaning solution followed by primer liquid from the probe for washing the inside of the probe; and a device for deflecting cleaning solution and primer liquid expelled from the probe onto the outside of the probe for washing the outside of the probe.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: February 5, 1991
    Assignee: Akzo N.V.
    Inventors: Julie F. Hoffman, Lionel D. Jones, II