Patents by Inventor James N. Dupree

James N. Dupree 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: 5402240
    Abstract: An instrument for measuring sperm concentration and calculating dose value and having an optical assembly with a light source, a specimen holder and a photodetector, a computation unit, a display, and a storage unit for storing a concentration calculation equation. The computation unit provides for calculating sperm concentration using the stored concentration calibration equation and a sample transmittance value, the optical assembly provides for measuring transmission of the specimen holder while empty with the light source energized, sample transmission of the specimen holder with a semen specimen with the light source energized, and dark cell output of said photodetector with said light source unenergized, and dark cell output of said photodetector with said light source unenergized, and said computation unit further provides for calculating actual sample percent transmission.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: March 28, 1995
    Assignee: Dupree, Inc.
    Inventors: Douglas W. Thistlethwaite, Jack E. Peterson, James N. Dupree
  • Patent number: 4632562
    Abstract: Apparatus and method for measuring the density of sperm in a sample and for calculating the magnitude of dose required for artificial insemination. An optical assembly with light source, specimen holder and photodetector providing a signal to an amplifier the output of which is proportional to absorbance of the sample. A signal selection system utilizes three parallel signal channels with each having a different correction factor for matching the absorbance signal to actual density count, and including means for selecting the appropriate signal channel as a function of signal amplitude, with the output when calibrated providing the direct reading of the sperm density. Knowing the number of sperm cells desired per insemination and the percent motility of the sample sperm, the required dose is calculated as a function of the density count.
    Type: Grant
    Filed: August 9, 1985
    Date of Patent: December 30, 1986
    Assignee: Dupree, Inc.
    Inventors: James N. Dupree, Jack E. Peterson
  • Patent number: 4589774
    Abstract: Apparatus and method for measuring the density of sperm in a sample and for calculating the magnitude of dose required for artificial insemination. An optical assembly with light source, specimen holder and photodetector providing a signal to an amplifier the output of which is proportional to absorbance of the sample. A signal selection system utilizes three parallel signal channels with each having a different correction factor for matching the absorbance signal to actual density count, and including means for selecting the appropriate signal channel as a function of signal amplitude, with the output when calibrated providing the direct reading of the sperm density. Knowing the number of sperm cells desired per insemination and the percent motility of the sample sperm, the required dose is calculated as a function of the density count.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: May 20, 1986
    Assignee: Dupree, Inc.
    Inventors: James N. Dupree, Jack E. Peterson