Patents by Inventor Jeffrey L. Lomibao

Jeffrey L. Lomibao 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).

  • Colorimetric analyzer with reagent diagnostics
    Patent number: 10677717
    Abstract: A colorimetric analyzer includes a reaction chamber configured to receive a sample and at least one reagent. A measurement cell is operably coupled to the reaction chamber. The measurement cell has an illumination source and an illumination detector spaced from the illumination source such that illumination from the illumination source passes through the measurement cell to the illumination detector. A controller is coupled to the illumination source and the illumination detector. The controller is configured to determine an absorbance of a reducing reagent and store the determined reagent absorbance in the analyzer. The controller is configured to use the determined reagent absorbance to compensate at least one subsequent colorimetric sample measurement.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: June 9, 2020
    Assignee: Rosemount Inc.
    Inventors: Hoang M. Nguyen, Jeffrey L. Lomibao, Chang-Dong Feng
  • Colorimetric analyzer with improved error detection
    Patent number: 10222322
    Abstract: A colorimetric analyzer includes a reaction chamber configured to receive a sample and at least one reagent. A measurement cell is operably coupled to the reaction chamber. The colorimetric analyzer has an illumination source configured to emit illumination at a first wavelength during a first absorbance measurement and at a second wavelength during a second absorbance measurement. The colorimetric analyzer also includes an illumination detector spaced from the illumination source such that illumination from the illumination source passes through the measurement cell to the illumination detector. A controller is coupled to the illumination source and the illumination detector. The controller is configured to detect an obstruction of light between the illumination source and the illumination detector based on the first and the second absorbance measurements.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: March 5, 2019
    Assignee: Rosemount Inc.
    Inventors: Calin I. Ciobanu, Hoang M. Nguyen, Jung S. Hwang, Jeffrey L. Lomibao, Behzad Rezvani
  • COLORIMETRIC ANALYZER WITH IMPROVED ERROR DETECTION
    Publication number: 20180356335
    Abstract: A colorimetric analyzer includes a reaction chamber configured to receive a sample and at least one reagent. A measurement cell is operably coupled to the reaction chamber. The colorimetric analyzer has an illumination source configured to emit illumination at a first wavelength during a first absorbance measurement and at a second wavelength during a second absorbance measurement. The colorimetric analyzer also includes an illumination detector spaced from the illumination source such that illumination from the illumination source passes through the measurement cell to the illumination detector. A controller is coupled to the illumination source and the illumination detector. The controller is configured to detect an obstruction of light between the illumination source and the illumination detector based on the first and the second absorbance measurements.
    Type: Application
    Filed: June 8, 2017
    Publication date: December 13, 2018
    Inventors: Calin I. Ciobanu, Hoang M. Nguyen, Jung S. Hwang, Jeffrey L. Lomibao, Behzad Rezvani
  • COLORIMETRIC ANALYZER WITH REAGENT DIAGNOSTICS
    Publication number: 20180095027
    Abstract: A colorimetric analyzer includes a reaction chamber configured to receive a sample and at least one reagent. A measurement cell is operably coupled to the reaction chamber. The measurement cell has an illumination source and an illumination detector spaced from the illumination source such that illumination from the illumination source passes through the measurement cell to the illumination detector. A controller is coupled to the illumination source and the illumination detector. The controller is configured to determine an absorbance of a reducing reagent and store the determined reagent absorbance in the analyzer. The controller is configured to use the determined reagent absorbance to compensate at least one subsequent colorimetric sample measurement.
    Type: Application
    Filed: May 25, 2017
    Publication date: April 5, 2018
    Inventors: Hoang M. Nguyen, Jeffrey L. Lomibao, Chang-Dong Feng