Patents by Inventor Cheung Hoi Yu

Cheung Hoi Yu 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: 20230366881
    Abstract: The application relates to a method and device for quantitatively analyzing the detection results of lateral flow-type test kits. Disclosed is a method for quantitatively analyzing the test results of a lateral flow-type test kit wherein the test kit includes a result area in which a control C-line region and a detection T-line region are set.
    Type: Application
    Filed: March 29, 2023
    Publication date: November 16, 2023
    Inventors: Cheung Hoi Yu, Shui Ying Tsang, Wing Cheong Chan
  • Patent number: 11262327
    Abstract: Methods for fabricating a biochip for detecting or sequencing biomolecules are shown. Such a biochip may for instance include: a base member; a dielectric layer deposited on the base member and having at least two rows of discrete recesses formed thereon; and two or more electrodes sandwiched between the base member and the dielectric layer and running under respective row of discrete recesses, the two or more electrodes separated from each other along lengths thereof by a portion of the dielectric layer; wherein the dielectric layer defines a continuous operation surface above the electrodes and on which the discrete recesses are deposited for detecting or sequencing of biomolecules, when an electric field is applied through the electrodes, a field gradient is created to draw a biomolecule towards a preferred part of the operation surface.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: March 1, 2022
    Assignee: Hai Kang Life Corporation Limited
    Inventors: Cheung Hoi Yu, Bo Liang Jia, Cheng Chang Lai
  • Publication number: 20190302094
    Abstract: Methods for fabricating a biochip for detecting or sequencing biomolecules are shown. Such a biochip may for instance include: a base member; a dielectric layer deposited on the base member and having at least two rows of discrete recesses formed thereon; and two or more electrodes sandwiched between the base member and the dielectric layer and running under respective row of discrete recesses, the two or more electrodes separated from each other along lengths thereof by a portion of the dielectric layer; wherein the dielectric layer defines a continuous operation surface above the electrodes and on which the discrete recesses are deposited for detecting or sequencing of biomolecules, when an electric field is applied through the electrodes, a field gradient is created to draw a biomolecule towards a preferred part of the operation surface.
    Type: Application
    Filed: June 20, 2019
    Publication date: October 3, 2019
    Inventors: Cheung Hoi Yu, Bo Liang Jia, Cheng Chang Lai
  • Patent number: 10379101
    Abstract: A biochip for detecting or sequencing biomolecules and a method of making the same. The biochip comprises a base member; a dielectric layer being deposited on the base member and having at least two rows of discrete recesses being formed thereon; and two or more electrodes being sandwiched between the base member and the dielectric layer and running under respective row of discrete recesses, the two or more electrodes are separated from each other along length by a portion of the dielectric layer; wherein the dielectric layer defines a continuous operation surface above the electrodes and on which the discrete recesses are deposited for detecting or sequencing of biomolecules, when an electric field is applied through the electrodes, a field gradient is created to draw biomolecule towards a preferred part of the operation surface.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: August 13, 2019
    Assignee: HAI KANG LIFE CORPORATION LIMITED
    Inventors: Cheung Hoi Yu, Bo Liang Jia, Cheng Chang Lai
  • Publication number: 20170146509
    Abstract: A biochip for detecting or sequencing biomolecules and a method of making the same. The biochip comprises a base member; a dielectric layer being deposited on the base member and having at least two rows of discrete recesses being formed thereon; and two or more electrodes being sandwiched between the base member and the dielectric layer and running under respective row of discrete recesses, the two or more electrodes are separated from each other along length by a portion of the dielectric layer; wherein the dielectric layer defines a continuous operation surface above the electrodes and on which the discrete recesses are deposited for detecting or sequencing of biomolecules, when an electric field is applied through the electrodes, a field gradient is created to draw biomolecule towards a preferred part of the operation surface.
    Type: Application
    Filed: November 23, 2015
    Publication date: May 25, 2017
    Inventors: Cheung Hoi YU, Bo Liang JIA, Cheng Chang LAI
  • Patent number: 8198070
    Abstract: Apparatus and methods are described for detecting target DNA in a biological sample using capture probes and electrically-assisted hybridization. The reaction cell is formed with an attachment surface of aluminum oxide for better thermal and physical properties, and the aluminum oxide surface is coated with anti-DIG antibody to provide a convenient attachment layer for the capture probes allowing their correct orientation, while the capture probes are formed with a DIG-label so that they attach to the surface of the cell through an anti-DIG/DIG linkage.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: June 12, 2012
    Assignee: Hai Kang Life Corporation Limited
    Inventors: Cheung Hoi Yu, Lok-Ting Lau, Selma Sau Wah Lin, Duncan Ka-Yun Chan
  • Patent number: 8110669
    Abstract: Apparatus and methods are described for detecting target DNA in a biological sample using capture probes and electrically-assisted hybridization. The reaction cell is formed with an attachment surface of aluminum oxide for better thermal and physical properties, and the aluminum oxide surface is coated with anti-DIG antibody to provide a convenient attachment layer for the capture probes allowing their correct orientation, while the capture probes are formed with a DIG-label so that they attach to the surface of the cell through an anti-DIG/DIG linkage.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: February 7, 2012
    Assignee: Hai Kang Life Corporation Limited
    Inventors: Cheung Hoi Yu, Lok-Ting Lau, Selma Sau Wah Lin, Duncan Ka-Yun Chan
  • Publication number: 20120010093
    Abstract: There are disclosed apparatus and methods for the field-assisted acceleration of biological processes involving charged entities, including in particular the detection of target DNA in a biological sample. A reaction cell is provided with a dielectric surface, and a field is generated by inducing charge-separation in the dielectric material by applying a potential to an electrode in contact with the dielectric material.
    Type: Application
    Filed: February 14, 2011
    Publication date: January 12, 2012
    Applicant: HAI KANG LIFE CORPORATION LIMITED
    Inventors: Cheung Hoi Yu, Lok Ting Lau, Ka Wai Wong
  • Publication number: 20110165665
    Abstract: Apparatus and methods are described for detecting target DNA in a biological sample using capture probes and electrically-assisted hybridization. The reaction cell is formed with an attachment surface of aluminum oxide for better thermal and physical properties, and the aluminum oxide surface is coated with anti-DIG antibody to provide a convenient attachment layer for the capture probes allowing their correct orientation, while the capture probes are formed with a DIG-label so that they attach to the surface of the cell through an anti-DIG/DIG linkage.
    Type: Application
    Filed: March 16, 2011
    Publication date: July 7, 2011
    Applicant: HAI KANG LIFE CORPORATION LIMITED
    Inventors: Cheung Hoi YU, Lok-Ting Lau, Selma Sau Wah Lin, Duncan Ka-Yun Chan
  • Patent number: 7888109
    Abstract: There are disclosed apparatus and methods for the field-assisted acceleration of biological processes involving charged entities, including in particular the detection of target DNA in a biological sample. A reaction cell is provided with a dielectric surface, and a field is generated by inducing charge-separation in the dielectric material by applying a potential to an electrode in contact with the dielectric material.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: February 15, 2011
    Assignee: Hai Kang Life Corporation Limited
    Inventors: Cheung Hoi Yu, Lok Ting Lau, Ka Wai Wong
  • Publication number: 20100233721
    Abstract: Apparatus and methods are described for detecting target DNA in a biological sample using capture probes and electrically-assisted hybridization. The reaction cell is formed with an attachment surface of aluminum oxide for better thermal and physical properties, and the aluminum oxide surface is coated with anti-DIG antibody to provide a convenient attachment layer for the capture probes allowing their correct orientation, while the capture probes are formed with a DIG-label so that they attach to the surface of the cell through an anti-DIG/DIG linkage.
    Type: Application
    Filed: May 24, 2010
    Publication date: September 16, 2010
    Applicant: HAI KANG LIFE CORPORATION LIMITED
    Inventors: Cheung Hoi Yu, Lok-Ting Lau, Selma Sau Wah Lin, Duncan Ka-Yun Chan
  • Patent number: 7749705
    Abstract: Apparatus and methods are described for detecting target DNA in a biological sample using capture probes and electrically-assisted hybridization. The reaction cell is formed with an attachment surface of aluminum oxide for better thermal and physical properties, and the aluminum oxide surface is coated with anti-DIG antibody to provide a convenient attachment layer for the capture probes allowing their correct orientation, while the capture probes are formed with a DIG-label so that they attach to the surface of the cell through an anti-DIG/DIG linkage.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: July 6, 2010
    Assignee: Hai Kang Life Corporation Limited
    Inventors: Cheung Hoi Yu, Lok-Ting Lau, Selma Sau Wah Lin, Duncan Ka-Yun Chan
  • Publication number: 20100112548
    Abstract: Current methods for detecting influenza A subtype H5 virus, for example cell culture, haemagglutination-inhibition, fluorescent antibody and enzyme immunoassay, and reverse transcriptase polymerase chain reaction (RT-PCR) may have the disadvantages of low sensitivity and low specificity. Furthermore, such methods are relatively difficult to use, and may not be suitable for routine detection on a daily basis. The kit for detecting H5 virus of this invention may provide a user-friendly alternative that is relatively more sensitive and specific to H5 virus. The detection kit utilizes two specially designed primers A and B for the replication of H5 virus, and a specific capture probe for immobilizing the amplified viral RNA. An additional primer C is also designed for the detection of pathogenic H5 virus. The detection of H5 virus by the detection kit may be accomplished within one day if desired.
    Type: Application
    Filed: October 5, 2009
    Publication date: May 6, 2010
    Applicant: Hai Kang Life Corporation Limited
    Inventors: Albert Cheung-Hoi YU, Ka-Lun So, Lung-Sang Ko, Lok-Ting Lau
  • Patent number: 7611837
    Abstract: Current methods for detecting influenza A subtype H5 virus, for example cell culture, haemagglutination-inhibition, fluorescent antibody and enzyme immunoassay, and reverse transcriptase polymerase chain reaction (RT-PCR) may have the disadvantages of low sensitivity and low specificity. Furthermore, such methods are relatively difficult to use, and may not be suitable for routine detection on a daily basis. The kit for detecting H5 virus of this invention may provide a user-friendly alternative that is relatively more sensitive and specific to H5 virus. The detection kit utilizes two specially designed primers A and B for the replication of H5 virus, and a specific capture probe for immobilizing the amplified viral RNA. An additional primer C is also designed for the detection of pathogenic H5 virus. The detection of H5 virus by the detection kit may be accomplished within one day if desired.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: November 3, 2009
    Assignee: Hai Kang Life Corporation Ltd.
    Inventors: Albert Cheung-Hoi Yu, Ka-Lun So, Lung-Sang Ko, Lok-Ting Lau
  • Publication number: 20080242562
    Abstract: There are disclosed apparatus and methods for the field-assisted acceleration of biological processes involving charged entities, including in particular the detection of target DNA in a biological sample. A reaction cell is provided with a dielectric surface, and a field is generated by inducing charge-separation in the dielectric material by applying a potential to an electrode in contact with the dielectric material.
    Type: Application
    Filed: May 1, 2008
    Publication date: October 2, 2008
    Applicant: HAI KANG LIFE CORPORATION LIMITED
    Inventors: Cheung Hoi YU, Lok Ting Lau, Ka Wai Wong
  • Patent number: 7390622
    Abstract: There are disclosed apparatus and methods for the field-assisted acceleration of biological processes involving charged entities, including in particular the detection of target DNA in a biological sample. A reaction cell is provided with a dielectric surface, and a field is generated by inducing charge-separation in the dielectric material by applying a potential to an electrode in contact with the dielectric material.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: June 24, 2008
    Assignee: Hai Kang Life Corporation Limited
    Inventors: Cheung Hoi Yu, Lok Ting Lau, Ka Wai Wong
  • Publication number: 20080090224
    Abstract: The present invention relates to a process for the detection of nucleic acids from biological or environmental samples. The technique involves the amplification of the nucleic acid of interest, after conversion to cDNA if necessary, after which the amplified nucleic acid is used as the template for further amplification by the real-time PCR (RT-PCR) technique. This combination of amplification procedures increases the sensitivity and specificity of the amplification compared with conventional amplification techniques. The invention also relates to primers for the use in this method and a diagnostic test kit.
    Type: Application
    Filed: April 30, 2004
    Publication date: April 17, 2008
    Applicants: HONG KONG DNA CHIPS LIMITED, HAI KANG LIFE CORPORATION LIMITED
    Inventors: Cheung Hoi Yu, Lok Ting Lau
  • Patent number: 7153687
    Abstract: Apparatus and methods are described for detecting target DNA in a biological sample using capture probes and electrically-assisted hybridization. The reaction cell is formed with an attachment surface of aluminum oxide for better thermal and physical properties, and the aluminum oxide surface is coated with anti-DIG antibody to provide a convenient attachment layer for the capture probes allowing their correct orientation, while the capture probes are formed with a DIG-label so that they attach to the surface of the cell through an anti-DIG/DIG linkage.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: December 26, 2006
    Assignee: Hong Kong DNA Chips Limited
    Inventors: Cheung Hoi Yu, Lok-Ting Lau, Selma Sau Wah Lin, Duncan Ka-Yun Chan
  • Publication number: 20040142319
    Abstract: Current methods for detecting influenza A subtype H5 virus, for example cell culture, haemagglutination-inhibition, fluorescent antibody and enzyme immunoassay, and reverse transcriptase polymerase chain reaction (RT-PCR) may have the disadvantages of low sensitivity and low specificity. Furthermore, such methods are relatively difficult to use, and may not be suitable for routine detection on a daily basis. The kit for detecting H5 virus of this invention may provide a user-friendly alternative that is relatively more sensitive and specific to H5 virus. The detection kit utilizes two specially designed primers A and B for the replication of H5 virus, and a specific capture probe for immobilizing the amplified viral RNA. An additional primer C is also designed for the detection of pathogenic H5 virus. The detection of H5 virus by the detection kit may be accomplished within one day if desired.
    Type: Application
    Filed: April 7, 2003
    Publication date: July 22, 2004
    Inventors: Albert Cheung-Hoi Yu, Ka-Lun So, Lung-Sang Ko, Lok-Ting Lau
  • Publication number: 20040033496
    Abstract: Apparatus and methods are described for detecting target DNA in a biological sample using capture probes and electrically-assisted hybridization. The reaction cell is formed with an attachment surface of aluminum oxide for better thermal and physical properties, and the aluminum oxide surface is coated with anti-DIG antibody to provide a convenient attachment layer for the capture probes allowing their correct orientation, while the capture probes are formed with a DIG-label so that they attach to the surface of the cell through an anti-DIG/DIG linkage.
    Type: Application
    Filed: August 13, 2002
    Publication date: February 19, 2004
    Inventors: Cheung Hoi Yu, Lok-Ting Lau, Selma Sau Wah Lin, Duncan Ka-Yun Cha