Patents by Inventor Rixun Fang

Rixun Fang 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: 20230416806
    Abstract: The invention relates to methods and compositions for the detection and quantification of nucleotide sequence variants, such as genetic polymorphisms, with decreased error and increased sensitivity, including single molecule detection. Detection of genetic polymorphisms, including single nucleotide polymorphisms (SNPs), is highly useful for the study of physiology, disease, phylogeny and forensics. Current methods for the detection and identification of nucleic acid sequence variants, such as genetic polymorphisms, lack the sensitivity to accurately detect low incidence mutations, sequence variants or alleles. Detection techniques for highly multiplexed single molecule identification and quantification of analytes using optical systems are disclosed. Analytes include, but are not limited to, nucleic acid, such as DNA and RNA molecules, with and without modifications.
    Type: Application
    Filed: September 28, 2022
    Publication date: December 28, 2023
    Inventors: Bryan P. STAKER, Niandong LIU, Manohar R. FURTADO, Rixun FANG
  • Publication number: 20230392202
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. There have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy or polynucleotide sequencing applications.
    Type: Application
    Filed: March 9, 2023
    Publication date: December 7, 2023
    Inventors: Bryan P. STAKER, Niandong LIU, Manohar R. FURTADO, Rixun FANG, Norman BURNS, Windsor OWENS
  • Patent number: 11453917
    Abstract: The methods and compositions provided herein relate to the discovery of 13 STR markers, found on the human Y chromosome, having surprisingly high mutation rates when compared with 173 other Y-STR markers known today. The set of RM-Y-STRs may overcome the current dilemma of Y-chromosome analysis in forensic applications due to their extraordinary mutation properties. Embodiments of the invention include methods for allelic determination of rapidly-mutating Y-STR markers, amplification primers for the analysis of rapidly-mutating Y-STR markers, allelic ladders for analysis of rapidly-mutating Y-STR markers, and kits for the analysis of rapidly-mutating Y-STR markers.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: September 27, 2022
    Inventors: Rixun Fang, Manohar Furtado, Manfred Kayser, Kaye Ballantyne
  • Patent number: 11434532
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. There have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy or polynucleotide sequencing applications.
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: September 6, 2022
    Assignee: APTON BIOSYSTEMS, INC.
    Inventors: Bryan P. Staker, Niandong Liu, Manohar R. Furtado, Rixun Fang, Norman Burns, Windsor Owens
  • Publication number: 20220073975
    Abstract: Some embodiments of the methods provided herein relate to amplifying and detecting a target nucleic acid. Some such embodiments include performing a recombinase polymerase amplification (RPA) and, optionally, a second isothermal amplification reaction. In some embodiments, the second isothermal amplification reaction includes loop-mediated isothermal amplification (LAMP). In some embodiments, the second isothermal amplification reaction is performed in conjunction with the RPA. In some embodiments, the second isothermal amplification reaction is performed on amplification products of the RPA. Some embodiments also include detecting the presence of amplification products by measuring a modulation of an electoral signal such as impedance.
    Type: Application
    Filed: December 18, 2019
    Publication date: March 10, 2022
    Inventors: Rixun Fang, Joseph Carl Gaiteri, Brenna Hearn Lord, Yuh-Min Chiang, Ronald Phillip Chiarello
  • Publication number: 20220056511
    Abstract: Embodiments relate to methods, systems and compositions for reducing nonspecific amplification in isothermal amplification reactions. Some embodiments relate to reducing nonspecific amplification in loop-mediated isothermal amplification (LAMP) reactions with certain oligonucleotides.
    Type: Application
    Filed: December 18, 2019
    Publication date: February 24, 2022
    Inventors: Joseph Carl Gaiteri, Rixun Fang, Brenna Hearn Lord, Yuh-Min Chiang, Ronald Phillip Chiarello
  • Publication number: 20220048031
    Abstract: Some embodiments of the systems, devices, kits and methods provided herein relate to amplifying and detecting a target nucleic acid. Some such embodiments include a droplet comprising an aqueous reaction mixture and an oil, and a detection unit. Some embodiments include a passageway or conduit configured to transport the droplet. In some embodiments, the detection unit includes an electric field-generating unit and an electro-sensing element.
    Type: Application
    Filed: December 18, 2019
    Publication date: February 17, 2022
    Inventors: Yuh-Min Chiang, Rixun Fang, Ronald Phillip Chiarello
  • Publication number: 20210277469
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. There have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy or polynucleotide sequencing applications.
    Type: Application
    Filed: May 21, 2021
    Publication date: September 9, 2021
    Inventors: Bryan P. STAKER, Niandong LIU, Manohar R. FURTADO, Rixun FANG, Norman BURNS, Windsor OWENS
  • Patent number: 11060140
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. These have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy of polynucleotide sequencing applications.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: July 13, 2021
    Assignee: APTON BIOSYSTEMS, INC.
    Inventors: Bryan P. Staker, Niandong Liu, Manohar R. Furtado, Rixun Fang, Norman Burns, Windsor Owens
  • Patent number: 11047005
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. These have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy of polynucleotide sequencing applications.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: June 29, 2021
    Assignee: APTON BIOSYSTEMS, INC.
    Inventors: Bryan P. Staker, Niandong Liu, Manohar R. Furtado, Rixun Fang, Norman Burns, Windsor Owens
  • Publication number: 20210087627
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. These have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy of polynucleotide sequencing applications.
    Type: Application
    Filed: October 29, 2020
    Publication date: March 25, 2021
    Inventors: Bryan P. STAKER, Niandong LIU, Manohar R. FURTADO, Rixun FANG, Norman BURNS, Windsor OWENS
  • Publication number: 20200299786
    Abstract: The methods and compositions provided herein relate to the discovery of 13 STR markers, found on the human Y chromosome, having surprisingly high mutation rates when compared with 173 other Y-STR markers known today. The set of RM-Y-STRs may overcome the current dilemma of Y-chromosome analysis in forensic applications due to their extraordinary mutation properties. Embodiments of the invention include methods for allelic determination of rapidly-mutating Y-STR markers, amplification primers for the analysis of rapidly-mutating Y-STR markers, allelic ladders for analysis of rapidly-mutating Y-STR markers, and kits for the analysis of rapidly-mutating Y-STR markers.
    Type: Application
    Filed: April 3, 2020
    Publication date: September 24, 2020
    Inventors: Rixun Fang, Manohar Furtado, Manfred Kayser, Kaye Ballantyne
  • Publication number: 20200140933
    Abstract: The invention relates to methods and compositions for the detection and quantification of nucleotide sequence variants, such as genetic polymorphisms, with decreased error and increased sensitivity, including single molecule detection. Detection of genetic polymorphisms, including single nucleotide polymorphisms (SNPs), is highly useful for the study of physiology, disease, phylogeny and forensics. Current methods for the detection and identification of nucleic acid sequence variants, such as genetic polymorphisms, lack the sensitivity to accurately detect low incidence mutations sequence variants or alleles. Detection techniques for highly multiplexed single molecule identification and quantification of analytes using optical systems are disclosed. Analytes include, but are not limited to, nucleic acid, such as DNA and RNA molecules, with and without modifications.
    Type: Application
    Filed: March 20, 2018
    Publication date: May 7, 2020
    Inventors: Bryan P. STAKER, Niandong LIU, Manohar R. FURTADO, Rixun FANG
  • Publication number: 20200063200
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. These have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy of polynucleotide sequencing applications.
    Type: Application
    Filed: September 16, 2019
    Publication date: February 27, 2020
    Inventors: Bryan P. STAKER, Niandong LIU, Manohar R. FURTADO, Rixun FANG, Norman BURNS, Windsor OWENS
  • Publication number: 20190323080
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. These have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy of polynucleotide sequencing applications.
    Type: Application
    Filed: July 1, 2019
    Publication date: October 24, 2019
    Inventors: Bryan P. Staker, Niandong Liu, Manohar R. Furtado, Rixun Fang, Norman Burns, Windsor Owens
  • Patent number: 10378053
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. These have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy of polynucleotide sequencing applications.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: August 13, 2019
    Assignee: Apton Biosystems, Inc.
    Inventors: Bryan P. Staker, Niandong Liu, Manohar R. Furtado, Rixun Fang, Norman Burns, Windsor Owens
  • Publication number: 20180298453
    Abstract: The methods and compositions provided herein relate to the discovery of 13 STR markers, found on the human Y chromosome, having surprisingly high mutation rates when compared with 173 other Y-STR markers known today. The set of RM-Y-STRs may overcome the current dilemma of Y-chromosome analysis in forensic applications due to their extraordinary mutation properties. Embodiments of the invention include methods for allelic determination of rapidly-mutating Y-STR markers, amplification primers for the analysis of rapidly-mutating Y-STR markers, allelic ladders for analysis of rapidly-mutating Y-STR markers, and kits for the analysis of rapidly-mutating Y-STR markers.
    Type: Application
    Filed: April 6, 2018
    Publication date: October 18, 2018
    Inventors: Rixun FANG, Manohar FURTADO, Manfred KAYSER, Kaye BALLANTYNE
  • Publication number: 20180274028
    Abstract: Disclosed herein are methods and systems for detection and discrimination of optical signals from a densely packed substrate. These have broad applications for biomolecule detection near or below the diffraction limit of optical systems, including in improving the efficiency and accuracy of polynucleotide sequencing applications.
    Type: Application
    Filed: March 19, 2018
    Publication date: September 27, 2018
    Inventors: Bryan P. Staker, Niandong Liu, Manohar R. Furtado, Rixun Fang, Norman Burns, Windsor Owens
  • Patent number: 9481909
    Abstract: The invention relates to a method for simultaneous quantification of human nuclear DNA and human male DNA in a biological sample while also detecting the presence of PCR inhibitors in a single reaction. The multiplex quantification method also provides a ratio of human nuclear and male DNA present in a biological sample. Such sample characterization is useful for achieving efficient and accurate results in downstream molecular techniques such as genotyping.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: November 1, 2016
    Assignee: APPLIED BIOSYSTEMS, LLC
    Inventors: Jaiprakash Shewale, Manohar Furtado, Pius Brzoska, Maura Barbisin, Rixun Fang, Michael Malicdem, Cristin O'Shea
  • Publication number: 20150361493
    Abstract: The invention relates to a method for simultaneous quantification of human nuclear DNA and human male DNA in a biological sample while also detecting the presence of PCR inhibitors in a single reaction. The multiplex quantification method also provides a ratio of human nuclear and male DNA present in a biological sample. Such sample characterization is useful for achieving efficient and accurate results in downstream molecular techniques such as genotyping.
    Type: Application
    Filed: June 19, 2015
    Publication date: December 17, 2015
    Inventors: Jaiprakash SHEWALE, Manohar Furtado, Pius Brzoska, Maura Barbisin, Rixun Fang, Michael Malicdem, Cristin O'Shea