Patents by Inventor Donald Walt Chandler

Donald Walt Chandler 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).

  • Methods and systems for the detection of 11-oxo androgens by LC-MS/MS
    Patent number: 11536733
    Abstract: Disclosed are methods, systems, and computer program products for using liquid chromatography/tandem mass spectrometry (LC-MS/MS) for the analysis of endogenous biomarkers, such as 11-oxo androgens, in a sample. The 11-oxo androgens may comprise at least one of 11-hydroxyandrostendione (11OHA), 11-hydroxytestosterone (11OHT) or 11-ketotestosterone (11KT). More specifically, the methods, systems, and computer program products are described for detecting and quantifying the amount of an 11-oxo-androgen in a sample.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: December 27, 2022
    Assignee: Laboratory Corporation of America Holdings
    Inventors: Brett Holmquist, Donald Walt Chandler, Russell Philip Grant, William Curtin
  • Methods and Systems for the Detection of 11-Oxo Androgens by LC-MS/MS
    Publication number: 20200333361
    Abstract: Disclosed are methods, systems, and computer program products for using liquid chromatography/tandem mass spectrometry (LC-MS/MS) for the analysis of endogenous biomarkers, such as 11-oxo androgens, in a sample. The 11-oxo androgens may comprise at least one of 11-hydroxyandrostendione (11OHA), 11-hydroxytestosterone (11OHT) or 11-ketotestosterone (11KT). More specifically, the methods, systems, and computer program products are described for detecting and quantifying the amount of an 11-oxo-androgen in a sample.
    Type: Application
    Filed: April 16, 2020
    Publication date: October 22, 2020
    Inventors: Brett Holmquist, Donald Walt Chandler, Russell Philip Grant, William Curtin
  • Methods and systems for determining the presence or amount of testosterone in a sample
    Patent number: 9029162
    Abstract: Disclosed are methods and systems for the analysis of testosterone in a sample using supported liquid extraction and liquid chromatography-mass spectrometry.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: May 12, 2015
    Assignee: Laboratory Corporation of America Holdings
    Inventors: Russell Philip Grant, Matthew Crawford, Donald Walt Chandler, William Curtin
  • Methods and systems for determining the presence or amount of delta 5 steroid compounds in a sample
    Patent number: 8470602
    Abstract: Disclosed are methods and systems for the analysis of delta 5 steroid compounds in a sample using supported liquid extraction and liquid chromatography/mass spectrometry.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: June 25, 2013
    Assignee: Laboratory Corporation of America Holdings
    Inventors: Donald Walt Chandler, Russell Philip Grant, Samuel Meares, Patricia Holland
  • Methods and Systems for Determining the Presence or Amount of Delta 5 Steroid Compounds in a Sample
    Publication number: 20120270327
    Abstract: Disclosed are methods and systems for the analysis of delta 5 steroid compounds in a sample using supported liquid extraction and liquid chromatography/mass spectrometry.
    Type: Application
    Filed: February 7, 2012
    Publication date: October 25, 2012
    Applicant: LABORATORY CORPORATION OF AMERICA HOLDINGS
    Inventors: Donald Walt Chandler, Russell Philip Grant, Samuel Meares, Patricia Holland
  • Methods and Systems for Determining the Presence or Amount of Testosterone in a Sample
    Publication number: 20120238027
    Abstract: Disclosed are methods and systems for the analysis of testosterone in a sample using supported liquid extraction and liquid chromatography-mass spectrometry.
    Type: Application
    Filed: February 7, 2012
    Publication date: September 20, 2012
    Applicant: Laboratory Corporation of America Holdings
    Inventors: Russell Philip Grant, Matthew Crawford, Donald Walt Chandler, William Curtin