Patents by Inventor Nabil Saad

Nabil Saad 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).

  • PURGE-FREE OPEN-PATH SYSTEM AND METHOD FOR CAVITY ENHANCED SPECTROSCOPY
    Publication number: 20250093259
    Abstract: A method of measuring a quantity or characteristic of a qualified air, e.g., clean air or prefiltered air, present in an environment, e.g., a chamber or a cleanroom, includes freely placing a measurement apparatus with an open multipass cell in the environment, and allowing a qualified air, such as clean air or prefiltered air, present in the environment to move freely into and out of an optical cavity of the open multipass cell. The method further includes obtaining a measurement of a quantity or a characteristic based on the qualified air in the optical cavity.
    Type: Application
    Filed: August 28, 2024
    Publication date: March 20, 2025
    Inventors: Manish Gupta, John Brian Leen, Rupal Gupta, Nabil Saad, Andrew P. Chan
  • Spectroscopic quantification of extremely rare molecular species in the presence of interfering optical absorption
    Patent number: 9645077
    Abstract: Optical spectrometer apparatus, systems, and methods for analysis of carbon-14 including a resonant optical cavity configured to accept a sample gas including carbon-14, an optical source configured to deliver optical radiation to the resonant optical cavity, an optical detector configured to detect optical radiation emitted from the resonant cavity and to provide a detector signal; and a processor configured to compute a carbon-14 concentration from the detector signal, wherein computing the carbon-14 concentration from the detector signal includes fitting a spectroscopic model to a measured spectrogram, wherein the spectroscopic model accounts for contributions from one or more interfering species that spectroscopically interfere with carbon-14.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: May 9, 2017
    Assignees: Lawrence Livermore National Security, LLC, Picarro, Inc.
    Inventors: Ted Ognibene, Graham Bench, Alan Daniel McCartt, Kenneth Turteltaub, Chris W. Rella, Sze Tan, John A. Hoffnagle, Nabil Saad, Eric Crosson
  • SPECTROSCOPIC QUANTIFICATION OF EXTREMELY RARE MOLECULAR SPECIES IN THE PRESENCE OF INTERFERING OPTICAL ABSORPTION
    Publication number: 20160011101
    Abstract: Optical spectrometer apparatus, systems, and methods for analysis of carbon-14 including a resonant optical cavity configured to accept a sample gas including carbon-14, an optical source configured to deliver optical radiation to the resonant optical cavity, an optical detector configured to detect optical radiation emitted from the resonant cavity and to provide a detector signal; and a processor configured to compute a carbon-14 concentration from the detector signal, wherein computing the carbon-14 concentration from the detector signal includes fitting a spectroscopic model to a measured spectrogram, wherein the spectroscopic model accounts for contributions from one or more interfering species that spectroscopically interfere with carbon-14.
    Type: Application
    Filed: May 18, 2015
    Publication date: January 14, 2016
    Inventors: Ted Ognibene, Graham Bench, Alan Daniel McCartt, Kenneth Turteltaub, Chris W. Rella, Sze Tan, John A. Hoffnagle, Nabil Saad, Eric Crosson