Patents by Inventor John PRATAPAS

John PRATAPAS 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).

  • Method of absorbance correction in a spectroscopic heating value sensor
    Patent number: 8538717
    Abstract: A method and apparatus for absorbance correction in a spectroscopic heating value sensor in which a reference light intensity measurement is made on a non-absorbing reference fluid, a light intensity measurement is made on a sample fluid, and a measured light absorbance of the sample fluid is determined. A corrective light intensity measurement at a non-absorbing wavelength of the sample fluid is made on the sample fluid from which an absorbance correction factor is determined. The absorbance correction factor is then applied to the measured light absorbance of the sample fluid to arrive at a true or accurate absorbance for the sample fluid.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: September 17, 2013
    Assignees: Gas Technology Institute, North Carolina State University
    Inventors: Alexei Saveliev, Vilas Vyankatrao Jangale, Sergeui Zelepouga, John Pratapas
  • METHOD OF ABSORBANCE CORRECTION IN A SPECTROSCOPIC HEATING VALUE SENSOR
    Publication number: 20120197575
    Abstract: A method and apparatus for absorbance correction in a spectroscopic heating value sensor in which a reference light intensity measurement is made on a non-absorbing reference fluid, a light intensity measurement is made on a sample fluid, and a measured light absorbance of the sample fluid is determined. A corrective light intensity measurement at a non-absorbing wavelength of the sample fluid is made on the sample fluid from which an absorbance correction factor is determined. The absorbance correction factor is then applied to the measured light absorbance of the sample fluid to arrive at a true or accurate absorbance for the sample fluid.
    Type: Application
    Filed: January 28, 2011
    Publication date: August 2, 2012
    Applicants: NORTH CAROLINA STATE UNIVERSITY, GAS TECHNOLOGY INSTITUTE
    Inventors: Alexei SAVELIEV, Vilas Vyankatrao JANGALE, Sergeui ZELEPOUGA, John PRATAPAS