Patents by Inventor Ronnie L. Pratt

Ronnie L. Pratt 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).

  • Sensing elements and methods for uniformly making individual sensing elements
    Patent number: 5508509
    Abstract: Sensing elements, useful in sensing the concentration of a gas, e.g., carbon dioxide, in a medium, e.g. blood, and methods for making such sensing elements are disclosed. In one embodiment, the method comprises continuously placing a sensing composition precursor in contact with a continuous web, forming a continuous sensing composition from the precursor, and applying a continuous opaque film to the sensing composition. A plurality of individual sensing elements are formed from this composite structure. These sensing elements, which each have very similar sensing characteristics, are placed in a sensor fixture for use.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: April 16, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Masao Yafuso, Ronnie L. Pratt, Kathryn R. Bretscher, Kenneth B. Wood, John L. Dektar, James G. Bentsen