Patents by Inventor Sum Chan

Sum Chan 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).

  • Publication number: 20240185147
    Abstract: The present application discloses an improved transportation matching system, and corresponding methods and computer-readable media. According to the disclosed embodiments, the transportation matching system identifies low engagement transportation providers by analyzing information associated with the transportation providers to generate engagement levels. Furthermore, the system identifies an optimal match between a low engagement transportation provider (regardless of whether the transportation provider is online or offline) and a scheduled transportation request by utilizing attributes associated with a scheduled transportation request and attributes associated with transportation providers to generate rankings for the transportation providers. Additionally, the system provides the scheduled transportation request exclusively to a selected transportation provider based on the generated rankings.
    Type: Application
    Filed: December 26, 2023
    Publication date: June 6, 2024
    Inventors: Janette Yuen-Sum Fong, Joanna Mun Yee Chan, Bao Kham Chau, Dennis Li, Alex Collier Mazure, Jonathan Patrick O'Keefe, Ko-Ay Timmy Siauw, Anthony Michael Padin, Harel Sheniak, Samuel Soffes
  • Publication number: 20240044864
    Abstract: Methods are described for measuring the amount of a vitamin B2 in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying vitamin B2 in a sample utilizing on-line extraction methods coupled with tandem mass spectrometric techniques.
    Type: Application
    Filed: October 16, 2023
    Publication date: February 8, 2024
    Inventors: Changming Yang, Sum Chan
  • Publication number: 20230420235
    Abstract: Provided are methods of detecting the presence or amount of the active form of vitamin B6, pyridoxal 5?-phosphate, in a body fluid sample using tandem mass spectrometry coupled with liquid chromatography.
    Type: Application
    Filed: September 13, 2023
    Publication date: December 28, 2023
    Inventors: Qibo Jiang, Sum Chan, Richard E Reitz
  • Patent number: 11821889
    Abstract: Methods are described for measuring the amount of a vitamin B2 in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying vitamin B2 in a sample utilizing on-line extraction methods coupled with tandem mass spectrometric techniques.
    Type: Grant
    Filed: April 7, 2022
    Date of Patent: November 21, 2023
    Assignee: Quest Diagnostics Investments Incorporated
    Inventors: Changming Yang, Sum Chan
  • Patent number: 11798794
    Abstract: Provided are methods of detecting the presence or amount of the active form of vitamin B6, pyridoxal 5?-phosphate, in a body fluid sample using tandem mass spectrometry coupled with liquid chromatography.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: October 24, 2023
    Assignee: Quest Diagnostics Investments Incorporated
    Inventors: Qibo Jiang, Sum Chan, Richard E. Reitz
  • Publication number: 20230096666
    Abstract: Methods are described for measuring the amount of one or more of vitamin A, ?-tocopherol, and the combination of ?-tocopherol and ?-tocopherol in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying one or more of vitamin A, ?-tocopherol, and the combination of ?-tocopherol and ?-tocopherol in a sample.
    Type: Application
    Filed: November 28, 2022
    Publication date: March 30, 2023
    Inventors: Sum CHAN, Qibo JIANG
  • Publication number: 20230086372
    Abstract: An example method for estimating a media level of a media stack in a printer includes storing a media level model correlating a picker metric of a media picker to pick media from the media stack to the media level; measuring a current picker metric when the media picker picks the media from the media stack during a print job; adding the current picker metric to a historical data set; updating the media level model by generating a regression for the historical data set; and based on the current picker metric and the updated media level model, estimating a current media level of the media stack.
    Type: Application
    Filed: September 22, 2021
    Publication date: March 23, 2023
    Inventors: Peter James Boucher, Peter James Boucher, JR., Eric Scott Collins, Roseann Lok Sum Chan
  • Patent number: 11513130
    Abstract: Methods are described for measuring the amount of one or more of vitamin A, ?-tocopherol, and the combination of ?-tocopherol and ?-tocopherol in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying one or more of vitamin A, ?-tocopherol, and the combination of ?-tocopherol and ?-tocopherol in a sample.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: November 29, 2022
    Assignee: Quest Diagnostics Investment Incoporated
    Inventors: Sum Chan, Qibo Jiang
  • Publication number: 20220229041
    Abstract: Methods are described for measuring the amount of a vitamin B2 in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying vitamin B2 in a sample utilizing on-line extraction methods coupled with tandem mass spectrometric techniques.
    Type: Application
    Filed: April 7, 2022
    Publication date: July 21, 2022
    Inventors: Changming Yang, Sum Chan
  • Patent number: 11300559
    Abstract: Methods are described for measuring the amount of a vitamin B2 in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying vitamin B2 in a sample utilizing on-line extraction methods coupled with tandem mass spectrometric techniques.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: April 12, 2022
    Assignee: Quest Diagnostics Investments Incorporated
    Inventors: Changming Yang, Sum Chan
  • Publication number: 20210239718
    Abstract: Provided are methods for determining the amount of vitamin C in a sample using mass spectrometry. The methods generally involve ionizing vitamin C in a sample and detecting and quantifying the amount of the ion to determine the amount of vitamin C in the sample.
    Type: Application
    Filed: April 19, 2021
    Publication date: August 5, 2021
    Inventors: Qibo Jiang, Richard E. Reitz, Sum Chan
  • Publication number: 20210096141
    Abstract: Methods are described for measuring the amount of one or more of vitamin A, ?-tocopherol, and the combination of ?-tocopherol and ?-tocopherol in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying one or more of vitamin A, ?-tocopherol, and the combination of ?-tocopherol and ?-tocopherol in a sample.
    Type: Application
    Filed: December 7, 2020
    Publication date: April 1, 2021
    Inventors: Sum CHAN, Qibo JIANG
  • Patent number: 10955188
    Abstract: A mobile storage apparatus includes a cabinet having an insulated, closable storage chamber adapted to accommodate one or more objects in a temperature controlled environment. The cabinet also has or associated with a system for changing a temperature level of the storage chamber when the system is powered by a power supply. A storage chamber liner is provided and preferably formed from thin, sheet-form material arranged within the chamber adjacent one or more sides of the chamber, but spaced from one or more sides such that the liner divides a volume of the storage chamber into a main central volume for accommodating one or more objects in a temperature controlled environment and a minor peripheral volume for receiving one or more thermally conductive passive temperature control devices.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: March 23, 2021
    Assignee: Fridge-To-Go Limited
    Inventor: Chik Sum Chan
  • Patent number: 10859584
    Abstract: Methods are described for measuring the amount of one or more of vitamin A, ?-tocopherol, and the combination of ?-tocopherol and ?-tocopherol in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying one or more of vitamin A, ?-tocopherol, and the combination of ?-tocopherol and ?-tocopherol in a sample.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: December 8, 2020
    Assignee: Quest Diagnostics Investments Incorporated
    Inventors: Sum Chan, Qibo Jiang
  • Publication number: 20200381230
    Abstract: Provided are methods of detecting the presence or amount of the active form of vitamin B6, pyridoxal 5?-phosphate, in a body fluid sample using tandem mass spectrometry coupled with liquid chromatography.
    Type: Application
    Filed: August 18, 2020
    Publication date: December 3, 2020
    Inventors: Qibo Jiang, Sum Chan, Richard E. Reitz
  • Publication number: 20200370091
    Abstract: Provided are methods for determining the amount of total thiamine in a body fluid sample using liquid chromatography and mass spectrometry. Total thiamine is converted to free thiamine by treatment with an acid phosphatase prior to thiamine separation and quantification.
    Type: Application
    Filed: August 10, 2020
    Publication date: November 26, 2020
    Inventors: Sum Chan, Qibo Jiang, Richard E. Reitz
  • Patent number: 10738344
    Abstract: Provided are methods for determining the amount of total thiamine in a body fluid sample using liquid chromatography and mass spectrometry. Total thiamine is converted to free thiamine by treatment with an acid phosphatase prior to thiamine separation and quantification.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: August 11, 2020
    Assignee: Quest Diagnostics Investments Incorporated
    Inventors: Sum Chan, Qibo Jiang, Richard E. Reitz
  • Publication number: 20200182855
    Abstract: Methods are described for measuring the amount of a vitamin B2 in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying vitamin B2 in a sample utilizing on-line extraction methods coupled with tandem mass spectrometric techniques.
    Type: Application
    Filed: February 14, 2020
    Publication date: June 11, 2020
    Inventors: Changming Yang, Sum Chan
  • Patent number: 10571455
    Abstract: Methods are described for measuring the amount of a vitamin B2 in a sample. More specifically, mass spectrometric methods are described for detecting and quantifying vitamin B2 in a sample utilizing on-line extraction methods coupled with tandem mass spectrometric techniques.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: February 25, 2020
    Assignee: Quest Diagnostics Investments Incorporated
    Inventors: Changming Yang, Sum Chan
  • Publication number: 20200003795
    Abstract: The present invention relates to compositions and methods for analyzing analytes of interest in liquid samples by mass spectrometry, and preferably in patient samples. Preferred analytes of interest include sirolimus (rapamycin), corticosteroids, bile acids and lamotrigine (lamictal). In one embodiment, by careful selection of target ions, a number of corticosteroids can be analyzed simultaneously and without interference from closely related molecules. In another embodiment, the present methods combine high turbulence liquid chromatography with mass spectrometry performed in positive and negative mode in a single assay to enable the detection and quantification of the composit˜on of bile acid pools. By combining mass spectrometry and high-throughput chromatography, the methods and compositions described herein can provide a rapid, sensitive, and accurate assay for use in large clinical laboratories.
    Type: Application
    Filed: September 11, 2019
    Publication date: January 2, 2020
    Inventors: Sum CHAN, Richard E. REITZ, Mildred M. GOLDMAN, Seyed A. SADJADI, Michael P. CAUFIELD, Darren A. CARNS