Patents by Inventor Louis Lee Barrett

Louis Lee Barrett 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).

  • Self calibrating blood chamber
    Patent number: 9308306
    Abstract: An optical blood monitoring system and corresponding method avoid the need to obtain a precise intensity value of the light impinging upon the measured blood layer during the analysis. The system is operated to determine at least two optical measurements through blood layers of different thickness but otherwise substantially identical systems. Due to the equivalence of the systems, the two measurements can be compared so that the bulk extinction coefficient of the blood can be calculated based only on the known blood layer thicknesses and the two measurements. Reliable measurements of various blood parameters can thereby be determined without certain calibration steps.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: April 12, 2016
    Assignee: Fresenius Medical Care Holdings, Inc.
    Inventors: Louis Lee Barrett, Perry N. Law
  • SELF CALIBRATING BLOOD CHAMBER
    Publication number: 20150238672
    Abstract: An optical blood monitoring system and corresponding method avoid the need to obtain a precise intensity value of the light impinging upon the measured blood layer during the analysis. The system is operated to determine at least two optical measurements through blood layers of different thickness but otherwise substantially identical systems. Due to the equivalence of the systems, the two measurements can be compared so that the bulk extinction coefficient of the blood can be calculated based only on the known blood layer thicknesses and the two measurements. Reliable measurements of various blood parameters can thereby be determined without certain calibration steps.
    Type: Application
    Filed: February 24, 2014
    Publication date: August 27, 2015
    Applicant: Fresenius Medical Care Holdings, Inc.
    Inventors: Louis Lee Barrett, Perry N. Law