Patents by Inventor Yee LEUNG

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: 20150247785
    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: March 13, 2015
    Publication date: September 3, 2015
    Inventors: Wai-Yee LEUNG, Ching-Ying CHEUNG, Stephen YUE
  • Patent number: 9102835
    Abstract: Methods of using dyes and associated technology are provided. A dye, such as a monomeric dye or a dimeric dye, may be used in a nucleic acid gel staining application and/or a nucleic acid detection application. Such a dye and a salt that comprises an anion that is associated with a strong acid and a cation that is associated with a strong base may be used in such an application. A dimeric dye, such as a dimeric dye capable of forming a hairpin-like structure, may be used to stain and/or detect nucleic acids via a release-on-demand mechanism. A dimeric dye having low background fluorescence in the absence of nucleic acids and high fluorescence in the presence of nucleic acids, upon binding therewith, may be used to stain and/or detect nucleic acids.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: August 11, 2015
    Assignee: BIOTIUM, INC.
    Inventors: Fei Mao, Wai-Yee Leung
  • Publication number: 20150218380
    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: April 15, 2015
    Publication date: August 6, 2015
    Inventors: Wai-Yee LEUNG, Ching-Ying CHEUNG, Stephen YUE
  • Patent number: 9097667
    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: F—Y=???Formula II and 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: December 12, 2008
    Date of Patent: August 4, 2015
    Assignee: BIOTIUM, INC.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Hye Eun Hoover
  • Publication number: 20150185182
    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: Application
    Filed: October 3, 2014
    Publication date: July 2, 2015
    Inventors: Fei Mao, Wai-Yee Leung, Lori M. Roberts, Patrick Gordon McGarraugh
  • Patent number: 9018396
    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: September 18, 2013
    Date of Patent: April 28, 2015
    Assignee: Life Technologies Corporation
    Inventors: Wai-Yee Leung, Ching-Ying Cheung, Stephen Yue
  • Patent number: 9006437
    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: April 9, 2013
    Date of Patent: April 14, 2015
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung
  • Patent number: 8973565
    Abstract: An apparatus and method for inflicting brain injury on a laboratory animal that employs a platform for supporting the laboratory animal. The platform defines an opening for positioning the head of the laboratory animal over the opening. A projectile is launched from a projectile launching device orientated below the opening of the platform. The projectile launching device has a means for propelling the projectile directly at and/or through the opening of said platform, thereby inflicting brain injury on the animal via either a pressure wave or concussive impact of the projectile. Without helmet, direct impact of the projectile results in severe traumatic brain injury. Use of helmet protects animals from skull fracture, subdural hematoma, intracerebral hemorrhage and contusion yet produces mild concussion-like pathology.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: March 10, 2015
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Zhiyong Chen, Zhilin Liao, Frank C. Tortella, Xi-Chun May Lu, Jitendra R. Dave, Jay E. Bartlett, Mark F. Arnold, Mark P. Easterday, Mark W. Brown, Larry R. Holmes, Zachary J. Larimore, Kara E. Schmid, Deborah A. Shear, Lai Yee Leung, Andrea Mountney
  • Patent number: 8972663
    Abstract: A method for cache coherence, including: broadcasting, by a requester cache (RC) over a partially-ordered request network (RN), a peer-to-peer (P2P) request for a cacheline to a plurality of slave caches; receiving, by the RC and over the RN while the P2P request is pending, a forwarded request for the cacheline from a gateway; receiving, by the RC and after receiving the forwarded request, a plurality of responses to the P2P request from the plurality of slave caches; setting an intra-processor state of the cacheline in the RC, wherein the intra-processor state also specifies an inter-processor state of the cacheline; and issuing, by the RC, a response to the forwarded request after setting the intra-processor state and after the P2P request is complete; and modifying, by the RC, the intra-processor state in response to issuing the response to the forwarded request.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 3, 2015
    Assignee: Oracle International Corporation
    Inventors: Paul N. Loewenstein, Stephen E. Phillips, David Richard Smentek, Connie Wai Mun Cheung, Serena Wing Yee Leung, Damien Walker, Ramaswamy Sivaramakrishnan
  • Publication number: 20150056632
    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: March 18, 2014
    Publication date: February 26, 2015
    Applicant: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Hye Eun Hoover
  • Publication number: 20150025222
    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: Application
    Filed: April 9, 2014
    Publication date: January 22, 2015
    Applicant: Biotium, Inc.
    Inventors: Fei MAO, Wai-Yee LEUNG, Ching-Ying CHEUNG, Lori Michelle ROBERTS
  • Publication number: 20140345304
    Abstract: An integrated mobile apparatus pre-cools produce prior to shipment, for example, to purchasers or to a cold storage facility. The apparatus comprises a preparation chamber for receiving and arranging produce on a movable carrier, a cooling chamber for receiving the produce from the preparation chamber, and a shipping chamber for receiving the produce from the cooling chamber. The chambers are preferably housed in a single enclosure and are arranged linearly, with the cooling chamber interposed between the preparation chamber and the shipping chamber. A method for pre-cooling produce prior to shipment comprises (a) arranging the produce on a movable carrier located within the preparation chamber, (b) conveying the carrier from the preparation chamber to the cooling chamber, (c) cooling the produce in the cooling chamber, (d) conveying the cooled produce to the shipping chamber, and (e) unloading the produce from the shipping chamber on to a vehicle.
    Type: Application
    Filed: May 22, 2014
    Publication date: November 27, 2014
    Inventors: David Joe Yee Leung, Thomas King Fu Leung
  • Publication number: 20140343458
    Abstract: An apparatus and method for inflicting brain injury on a laboratory animal that employs a platform for supporting the laboratory animal. The platform defines an opening for positioning the head of the laboratory animal over the opening. A projectile is launched from a projectile launching device orientated below the opening of the platform. The projectile launching device has a means for propelling the projectile directly at and/or through the opening of said platform, thereby inflicting brain injury on the animal via either a pressure wave or concussive impact of the projectile. Without helmet, direct impact of the projectile results in severe traumatic brain injury. Use of helmet protects animals from skull fracture, subdural hematoma, intracerebral hemorrhage and contusion yet produces mild concussion-like pathology.
    Type: Application
    Filed: July 24, 2014
    Publication date: November 20, 2014
    Applicant: The Government of the United States as represented by the Secretary of the Army
    Inventors: Zhiyong Chen, Zhilin Liao, Frank C. Tortella, Xi-Chun May Lu, Jitendra R. Dave, Jay E. Bartlett, Mark F. Arnold, Mark P. Easterday, Mark W. Brown, Larry R. Holmes, Zachary J. Larimore, Kara E. Schmid, Deborah A. Shear, Lai Yee Leung, Andrea Mountney
  • Patent number: 8877437
    Abstract: Methods of using dyes and associated technology are provided. A dye, such as a monomeric dye or a dimeric dye, may be used in a nucleic acid gel staining application and/or a nucleic acid detection application. A dimeric dye, such as a dimeric dye capable of forming a hairpin-like structure, may be used to stain and/or detect nucleic acids via a release-on-demand mechanism. A dimeric dye having low background fluorescence in the absence of nucleic acids and high fluorescence in the presence of nucleic acids, upon binding therewith, may be used to stain and/or detect nucleic acids. Buffers comprising a weak acid and a salt of the weak acid, such as a lithium salt, are also provided to allow for effective prestaining of nucleic acids.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: November 4, 2014
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Tam Van
  • Publication number: 20140273151
    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: Application
    Filed: October 10, 2013
    Publication date: September 18, 2014
    Applicant: Biotium, Inc.
    Inventors: Fei Mao, Hui Cen, Wai-Yee Leung
  • Publication number: 20140281237
    Abstract: A method for cache coherence, including: broadcasting, by a requester cache (RC) over a partially-ordered request network (RN), a peer-to-peer (P2P) request for a cacheline to a plurality of slave caches; receiving, by the RC and over the RN while the P2P request is pending, a forwarded request for the cacheline from a gateway; receiving, by the RC and after receiving the forwarded request, a plurality of responses to the P2P request from the plurality of slave caches; setting an intra-processor state of the cacheline in the RC, wherein the intra-processor state also specifies an inter-processor state of the cacheline; and issuing, by the RC, a response to the forwarded request after setting the intra-processor state and after the P2P request is complete; and modifying, by the RC, the intra-processor state in response to issuing the response to the forwarded request.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Paul N. Loewenstein, Stephen E. Phillips, David Richard Smentek, Connie Wai Mun Cheung, Serena Wing Yee Leung, Damien Walker, Ramaswamy Sivaramakrishnan
  • Publication number: 20140220612
    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: April 8, 2014
    Publication date: August 7, 2014
    Applicant: LIFE TECHNOLOGIES CORPORATION
    Inventors: Robert BATCHELOR, Yue GE, Iain JOHNSON, Wai-Yee LEUNG, Jixiang LIU, Brian PATCH, Peter SMALLEY, Thomas STEINBERG, Kyle GEE
  • Patent number: 8790892
    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 4, 2012
    Date of Patent: July 29, 2014
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Wai-Yee Leung, Ching-Ying Cheung, Lori Michelle Roberts
  • Patent number: 8778627
    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: December 14, 2011
    Date of Patent: July 15, 2014
    Assignee: Biotium, Inc.
    Inventors: Fei Mao, Hui Cen, Wai-Yee Leung
  • Publication number: 20140193926
    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: Application
    Filed: November 14, 2013
    Publication date: July 10, 2014
    Applicant: LIFE TECHNOLOGIES CORPORATION
    Inventors: Richard HAUGLAND, Wai-Yee Leung, Jixiang Liu