Patents by Inventor Daniel E. Lee

Daniel E. Lee 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 for analyzing trace levels of semi-volatile nitrosamines in solid samples
    Patent number: 12730096
    Abstract: This invention describes a novel method encompassing preparing a nitrosamine sample, adding in relevant chemicals that reduces or eliminates in situ nitrosamine formation, utilizing full evaporation static headspace gas chromatograph coupled with nitrogen phosphorous detector (FE-SHSGC-NPD), and analysis of rapid results in the gaseous phase for sensitive detection of semi-volatile nitrosamines, including NDMA.
    Type: Grant
    Filed: July 11, 2022
    Date of Patent: September 8, 2026
    Assignee: Merck Sharp & Dohme
    Inventors: Rebecca Evans, Xinxin Han, Daniel E. Lee, Christine L. Radich, Jinjian Zheng
  • METHOD FOR ANALYZING TRACE LEVELS OF SEMI-VOLATILE NITROSAMINES IN SOLID SAMPLES
    Publication number: 20240345038
    Abstract: This invention describes a novel method encompassing preparing a nitrosamine sample. adding in relevant chemicals that reduces or eliminates in situ nitrosamine formation, utilizing full evaporation static headspace gas chromatograph coupled with nitrogen phosphorous detector (FE-SHSGC-NPD), and analysis of rapid results in the gaseous phase for sensitive detection of semi-volatile nitrosamines, including ND.MA.
    Type: Application
    Filed: July 11, 2022
    Publication date: October 17, 2024
    Applicant: Merck Sharp & Dohme LLC
    Inventors: Rebecca Evans, Xinxin Han, Daniel E. Lee, Christine L. Radich, Jinjian Zheng