Patents by Inventor Steven L. Durfee

Steven L. Durfee 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: 6243615
    Abstract: A method for displaying a visual process signature for ready visual recognition and communication of otherwise complex manufacturing process information. Process data may be stored in a plurality of data stores, each data store holding a plurality of records containing process data, each record associated with at least one process component. A proxy virtual database is created from copies of records selected from the data stores. Statistical analysis operations are applied to the selected records within the proxy virtual database to identify process components or combinations of process components having a significant effect on characteristics of a product produced as well as the magnitude of that effect. At least three characteristics of the identified process components including the outcome of the statistical analysis operations are selected and visually displayed in a static or animated three-dimensional representation shown on a two-dimensional display.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: June 5, 2001
    Assignee: Aegis Analytical Corporation
    Inventors: Justin O. Neway, Steven L. Durfee, Gretchen L. Jahn
  • Patent number: 5840851
    Abstract: The present invention generally relates to methods for purifying hemoglobin solutions and to hemoglobin solutions obtained by the methods. In one aspect, such methods include removing contaminants in crude hemoglobin-containing lysates with heat treatment. In a further aspect, the present invention provides methods for producing substantially purified hemoglobin solutions using immobilized metal affinity chromatography, optionally following by anion exchange chromatography.
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: November 24, 1998
    Inventors: J. Jeffrey Plomer, James R. Ryland, Maura-Ann H. Matthews, David W. Traylor, Erin E. Milne, Steven L. Durfee, Antony J. Mathews, Justinian O. Neway