Patents by Inventor Wai-Yee Leung

Wai-Yee Leung 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: 20230257587
    Abstract: The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and/or treatment of disease conditions.
    Type: Application
    Filed: June 7, 2021
    Publication date: August 17, 2023
    Inventors: Fei MAO, Wai-Yee LEUNG, Patrick MCGARRAUGH
  • Publication number: 20210102873
    Abstract: The present invention provides methods, compositions, and kits useful in preparing labeled molecules, which are useful in the detection of binding partners.
    Type: Application
    Filed: October 9, 2020
    Publication date: April 8, 2021
    Inventors: Fei MAO, Wai-Yee LEUNG, Ching-Ying CHEUNG, Hye Eun HOOVER
  • Patent number: 10837881
    Abstract: The present invention provides methods, compositions, and kits useful in preparing labeled molecules, which are useful in the detection of binding partners.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: November 17, 2020
    Assignee: BIOTIUM, INC.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Hye Eun Hoover
  • Patent number: 10570463
    Abstract: In some aspects, the disclosure provides compounds comprising nucleic acid modifying moieties, such as nucleic acid binding dyes comprising activatable groups. In some aspects, the disclosure provides nucleic acid probes comprising compounds of the disclosure, and methods of making the same. In some aspects, the disclosure provides methods of using compounds of the disclosure, such as methods of labeling and/or detecting non-viable organisms or non-viable cells, and methods of detecting contamination or infection.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: February 25, 2020
    Assignee: BIOTIUM, INC.
    Inventors: Fei Mao, Patrick Gordon McGarraugh, Alexis Spain Madrid, Wai-Yee Leung, Lori M. Roberts
  • Patent number: 10053484
    Abstract: The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and/or treatment of disease conditions.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: August 21, 2018
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Hye Eun Hoover
  • Patent number: 10011570
    Abstract: The invention provides compounds, including fluorescent nucleic acid dyes, and methods for use including nucleic acid detection. Further provided are kits, instruments and systems comprising compounds of the invention or adapted for use with compounds of the invention or other nucleic acid dyes.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: July 3, 2018
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Lori M. Roberts, Patrick Gordon McGarraugh
  • Publication number: 20180156810
    Abstract: The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and/or treatment of disease conditions.
    Type: Application
    Filed: July 26, 2017
    Publication date: June 7, 2018
    Inventors: Fei MAO, Wai-Yee LEUNG, Ching-Ying CHEUNG, Hye Eun HOOVER
  • Publication number: 20180143113
    Abstract: The present invention provides methods, compositions, and kits useful in preparing labeled molecules, which are useful in the detection of binding partners.
    Type: Application
    Filed: November 16, 2017
    Publication date: May 24, 2018
    Inventors: Fei MAO, Wai-Yee LEUNG, Ching-Ying CHEUNG, Hye Eun HOOVER
  • Publication number: 20180142283
    Abstract: In some aspects, the disclosure provides compounds comprising nucleic acid modifying moieties, such as nucleic acid binding dyes comprising activatable groups. In some aspects, the disclosure provides nucleic acid probes comprising compounds of the disclosure, and methods of making the same. In some aspects, the disclosure provides methods of using compounds of the disclosure, such as methods of labeling and/or detecting non-viable organisms or non-viable cells, and methods of detecting contamination or infection.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 24, 2018
    Inventors: Fei MAO, Patrick Gordon MCGARRAUGH, Alexis Spain MADRID, Wai-Yee LEUNG, Lori M. ROBERTS
  • Patent number: 9791450
    Abstract: The present invention relates to fluorescent dyes. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. In one aspect, the invention provides a compound having a maximal fluorescence excitation wavelength, wherein the compound has a structure of Formula II: wherein Z? is a counterion, Y is a bridge unit permitting electron delocalization between F and ?, and F is a moiety having the structure: The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and/or treatment of disease conditions.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: October 17, 2017
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Hye Eun Hoover
  • Publication number: 20170247402
    Abstract: The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and/or treatment of disease conditions.
    Type: Application
    Filed: December 12, 2016
    Publication date: August 31, 2017
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Hye Eun Hoover
  • Patent number: 9682970
    Abstract: The invention provides compounds, including fluorescent nucleic acid dyes, and methods for use including nucleic acid detection, nucleic acid amplification reactions, and high-resolution melt curve analysis. Further provided are kits, instruments and systems comprising compounds of the invention or adapted for use with compounds of the invention or other nucleic acid dyes.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: June 20, 2017
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Chingying Cheung, Wai-Yee Leung, Sarah Lynn Windler, Lori M. Roberts
  • Patent number: 9670476
    Abstract: Enzyme substrates and associated technology of the present invention are provided. An enzyme substrate of the invention may comprise a biologically functional fluorescent dye and an enzyme-specific substrate moiety attached in such a way that the functionality of the functional dye is diminished. An enzymatic reaction may cleave at least a portion of the substrate moiety from the enzyme substrate to provide a more functional product dye. This product dye may be nonfluorescent or weakly fluorescent, in general, and relatively fluorescent, in a particular condition, such as when bound to a partner biological molecule or an assembly of partner biological molecules. An enzyme substrate of the present invention may thus be useful in fluorescence detection, and/or in any of a variety of useful applications, such as the detection of enzymatic activity in a cell-free system or in a living cell, the screening of drugs, or the diagnosis of disease.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: June 6, 2017
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Hui Cen, Wai-Yee Leung
  • Patent number: 9670363
    Abstract: The invention discloses new substituted anthraquinone dyes that may be useful as cellular stains. In some aspect of the invention, the nuclear stains are useful for staining the nuclei of dead or fixed cells. Another aspect of the invention relates to substituted anthraquinone dyes comprising an enzyme substrate moiety that is transformable or cleavable by an enzyme such that the transformation or cleavage of the substrate moiety causes a detectable change in the functionality or spectral properties of the dye.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: June 6, 2017
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Lori Michelle Roberts
  • Patent number: 9580749
    Abstract: Dimeric and trimeric nucleic acid dyes, and associated systems and methods are provided. Such a dye may form a hairpin-like structure that enables it to stain nucleic acids via a release-on-demand mechanism, for example. Such a dye may have low background fluorescence in the absence of nucleic acids and high fluorescence in the presence of nucleic acids, upon binding therewith, for example. A dye provided herein may be useful in a variety of applications, such as in DNA quantitation in real-time PCR, for example.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: February 28, 2017
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Xing Xin
  • Patent number: 9579402
    Abstract: The present invention relates to fluorescent dyes in general. The present invention provides a wide range of fluorescent dyes and kits containing the same, which are applicable for labeling a variety of biomolecules, cells and microorganisms. The present invention also provides various methods of using the fluorescent dyes for research and development, forensic identification, environmental studies, diagnosis, prognosis, and/or treatment of disease conditions.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: February 28, 2017
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Hye Eun Hoover
  • Publication number: 20170037248
    Abstract: The invention provides novel fluorinated resorufin compounds that are of use in a variety of assay formats. Also provided are methods of using the compounds and kits that include a compound of the invention and instructions detailing the use of the compound in one or more assay formats.
    Type: Application
    Filed: October 21, 2016
    Publication date: February 9, 2017
    Inventors: Robert Batchelor, Yue GE, Iain JOHNSON, Wai-Yee LEUNG, Jixiang LIU, Brian PATCH, Peter SMALLEY, Thomas STEINBERG, Kyle GEE
  • Publication number: 20160356681
    Abstract: Chemically reactive carbocyanine dyes incorporating an indolium ring moiety that is substituted at the 3-position by a reactive group or by a conjugated substance, and their uses, are described. Conjugation through this position results in spectral properties that are uniformly superior to those of conjugates of spectrally similar dyes wherein attachment is at a different position. The invention includes derivative compounds having one or more benzo nitrogens.
    Type: Application
    Filed: August 16, 2016
    Publication date: December 8, 2016
    Inventors: Wai-Yee LEUNG, Ching-Ying CHEUNG, Stephen YUE
  • Patent number: 9513284
    Abstract: The invention provides a novel class of reactive fluorescent agents that are based on a pyrene sulfonic acid nucleus. The agents are readily incorporated into conjugates with other species by reacting the reactive group with a group of complementary reactivity on the other species of the conjugate. Also provided are methods of using the compounds of the invention to detect and/or quantify an analyte in a sample. In an exemplary embodiment, the invention provides multi-color assays incorporating the compounds of the invention.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: December 6, 2016
    Assignee: LIFE TECHNOLOGIES CORPORATION
    Inventors: Richard Haugland, Wai-Yee Leung, Jixiang Liu
  • Patent number: 9423323
    Abstract: Chemically reactive carbocyanine dyes incorporating an indolium ring moiety that is substituted at the 3-position by a reactive group or by a conjugated substance, and their uses, are described. Conjugation through this position results in spectral properties that are uniformly superior to those of conjugates of spectrally similar dyes wherein attachment is at a different position. The invention includes derivative compounds having one or more benzo nitrogens.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: August 23, 2016
    Assignee: Life Technologies Corporation
    Inventors: Wai-Yee Leung, Ching-Ying Cheung, Stephen Yue