Patents by Inventor Tak-Hang Chan

Tak-Hang 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: 20210300954
    Abstract: The invention relates to the chemical synthesis of oligonucleotides, e.g., oligoribonucleotides. In another aspect, the invention relates to compounds of formula (II): processes for making these compounds, and the use thereof in the chemical synthesis of oligonucleotides, e.g., oligoribonucleotides. The invention also relates to methods of synthesis of oligomers, including but not limited to oligopeptides, oligosaccharides and oligonucleotides, particularly oligoribonucleotides and also oligodeoxyribonucleotides, in solution systems, and ionic tag linkers for use in methods provided herein.
    Type: Application
    Filed: May 21, 2021
    Publication date: September 30, 2021
    Inventors: Masad J. Damha, Matthew Hassler, Tak-Hang Chan, Mallikarjuna Reddy Nandyala, Robert Alexander Donga
  • Patent number: 11045445
    Abstract: Method of treating endometriosis and related indications, comprising the administration of Pro-EGCG, a synthetic and derivative product of epigallocatechin-3-gallate [(?)-EGCG]. Use of PRO-EGCG in the manufacture of a medicament for treating endometriosis and related indications. Pro-EGCG for use in the treatment of endometriosis and related indications.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: June 29, 2021
    Assignees: The Hong Kong Polytechnic University, The Chinese University of Hong Kong
    Inventors: Tak-Hang Chan, Chi-Chiu Wang
  • Patent number: 11014948
    Abstract: The invention relates to the chemical synthesis of oligonucleotides, e.g., oligoribonucleotides. In another aspect, the invention relates to compounds of formula (II): processes for making these compounds, and the use thereof in the chemical synthesis of oligonucleotides, e.g., oligoribonucleotides. The invention also relates to methods of synthesis of oligomers, including but not limited to oligopeptides, oligosaccharides and oligonucleotides, particularly oligoribonucleotides and also oligodeoxyribonucleotides, in solution systems, and ionic tag linkers for use in methods provided herein.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: May 25, 2021
    Assignees: The Royal Institution for the Advancement of Learning/McGill University, Hong Kong Polytechnic University
    Inventors: Masad J. Damha, Matthew Hassler, Tak-Hang Chan, Mallikarjuna Reddy Nandyala, Robert Alexander Donga
  • Publication number: 20200261408
    Abstract: Method of treating endometriosis and related indications, comprising the administration of Pro-EGCG, a synthetic and derivative product of epigallocatechin-3-gallate [(?)-EGCG]. Use of PRO-EGCG in the manufacture of a medicament for treating endometriosis and related indications. Pro-EGCG for use in the treatment of endometriosis and related indications.
    Type: Application
    Filed: May 4, 2020
    Publication date: August 20, 2020
    Inventors: Tak-Hang CHAN, Chi-Chiu WANG
  • Patent number: 10646467
    Abstract: Method of treating endometriosis and related indications, comprising the administration of Pro-EGCG, a synthetic and derivative product of epigallocatechin-3-gallate [(?)-EGCG]. Use of PRO-EGCG in the manufacture of a medicament for treating endometriosis and related indications. Pro-EGCG for use in the treatment of endometriosis and related indications.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: May 12, 2020
    Inventors: Tak-Hang Chan, Chi-Chiu Wang
  • Publication number: 20190151282
    Abstract: Method of treating endometriosis and related indications, comprising the administration of Pro-EGCG, a synthetic and derivative product of epigallocatechin-3-gallate [(?)-EGCG]. Use of PRO-EGCG in the manufacture of a medicament for treating endometriosis and related indications. Pro-EGCG for use in the treatment of endometriosis and related indications.
    Type: Application
    Filed: January 28, 2019
    Publication date: May 23, 2019
    Inventors: Tak-Hang CHAN, Chi-Chiu WANG
  • Publication number: 20190062355
    Abstract: The invention relates to the chemical synthesis of oligonucleotides, e.g., oligoribonucleotides. In another aspect, the invention relates to compounds of formula (II): processes for making these compounds, and the use thereof in the chemical synthesis of oligonucleotides, e.g., oligoribonucleotides. The invention also relates to methods of synthesis of oligomers, including but not limited to oligopeptides, oligosaccharides and oligonucleotides, particularly oligoribonucleotides and also oligodeoxyribonucleotides, in solution systems, and ionic tag linkers for use in methods provided herein.
    Type: Application
    Filed: March 19, 2018
    Publication date: February 28, 2019
    Inventors: Masad J. Damha, Matthew Hassler, Tak-Hang Chan, Mallikarjuna Reddy Nandyala, Robert Alexander Donga
  • Publication number: 20190055276
    Abstract: The present invention relates to ionic liquids for use in chemical applications and capable of serving the dual function of solvent and liquid support. The ionic liquid lends itself to a method of synthesizing oligomers selected from the group consisting of oligopeptides, oligosaccharides and oligonucleotides, comprising contacting a first monomer unit with an ionic liquid at reaction conditions to provide an ionic liquid bound monomer unit; and contacting the ionic liquid bound monomer unit with at least one further monomer unit at reaction conditions to provide an ionic liquid bound oligomer comprising from 2 to 30 monomer units. The method lends itself to large scale manufacture of oligopeptides, oligosaccharides and oligonucleotides.
    Type: Application
    Filed: August 27, 2018
    Publication date: February 21, 2019
    Inventors: Tak-Hang Chan, Masad J. Damha, Weishi Miao, Robert Alexander Donga, Xun He
  • Patent number: 10208025
    Abstract: A triazole bridged flavonoid dimer compound library was efficiently constructed via the cycloaddition reaction of a series of flavonoid-containing azides (Az 1-15) and alkynes (Ac 1-17). These triazole bridged flavonoid dimers and their precursor alkyne- and azide-containing flavonoids were screened for their ability to modulate multidrug resistance (MDR) in P-gp-overexpressed cell line (LCC6MDR), MRP1-overexpressed cell line (2008/MRP1) and BCRP-overexpressed cell line (HEK293/R2 and MCF7-MX100). Generally, they displayed very promising MDR reversal activity against P-gp-, MRP1- and BCRP-mediated drug resistance. Moreover, they showed different levels of selectivity for various transporters. Overall, they can be divided into mono-selective, dual-selective and multi-selective modulators for the P-gp, MRP1 and BCRP transporters.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: February 19, 2019
    Assignees: The Hong Kong Polytechnic University, The Royal Institution for the Advancement of Learning/McGill University
    Inventors: Larry Ming Cheung Chow, Tak Hang Chan, Kin Fai Chan, Iris Lai King Wong, Man Chun Law
  • Patent number: 10188629
    Abstract: Method of treating endometriosis and related indications, comprising the administration of Pro-EGCG, a synthetic and derivative product of epigallocatechin-3-gallate [(?)-EGCG]. Use of Pro-EGCG in the manufacture of a medicament for treating endometriosis and related indications. Pro-EGCG for use in the treatment of endometriosis and related indications.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: January 29, 2019
    Inventors: Tak-Hang Chan, Chi-Chiu Wang
  • Patent number: 10059736
    Abstract: The present invention relates to ionic liquids for use in chemical applications and capable of serving the dual function of solvent and liquid support. The ionic liquid lends itself to a method of synthesizing oligomers selected from the group consisting of oligopeptides, oligosaccharides and oligonucleotides, comprising contacting a first monomer unit with an ionic liquid at reaction conditions to provide an ionic liquid bound monomer unit; and contacting the ionic liquid bound monomer unit with at least one further monomer unit at reaction conditions to provide an ionic liquid bound oligomer comprising from 2 to 30 monomer units. The method lends itself to large scale manufacture of oligopeptides, oligosaccharides and oligonucleotides.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: August 28, 2018
    Assignee: McGill University
    Inventors: Tak-Hang Chan, Masad J. Damha, Weishi Miao, Robert Alexander Donga, Xun He
  • Patent number: 9951039
    Abstract: Filamenting temperature-sensitive mutant Z (FtsZ) protein plays a crucial role in the bacterial cell division machinery and is a validated drug target for antibacterial agents. The present invention relates to FtsZ-interacting compounds that possess a 2,4,6-trisubstituted pyrimidine scaffold. Some of these compounds possess potent anti-staphylococcal properties and potent antibacterial activities against clinically isolated MRSA strains. Compounds have been identified to exhibit low spontaneous frequency of resistance, low toxicity as well as the ability to rescue G. mellonella larvae infected with lethal dose of the MRSA ATCC 43300 strain. Characterization by saturation transfer difference NMR, light scattering assay and GTPase hydrolysis assay with purified S. aureus FtsZ protein verified the interaction of 2,4,6-trisubstituted pyrimidine with the FtsZ protein, further confirmed by observations of iconic filamentous cell phenotype and mislocalization of the Z-ring formation.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: April 24, 2018
    Assignees: THE HONG KONG POLYTECHNIC UNIVERSITY, THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY
    Inventors: Kwok-yin Wong, Tak-Hang Chan, Kin-Fai Chan
  • Patent number: 9920084
    Abstract: The invention relates to the chemical synthesis of oligonucleotides, e.g., oligoribonucleotides. In another aspect, the invention relates to compounds of formula (II) processes for making these compounds, and the use thereof in the chemical synthesis of oligonucleotides, e.g., oligoribonucleotides. The invention also relates to methods of synthesis of oligomers, including but not limited to oligopeptides, oligosaccharides and oligonucleotides, particularly oligoribonucleotides and also oligodeoxyribonucleotides, in solution systems, and ionic tag linkers for use in methods provided herein.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: March 20, 2018
    Assignees: The Royal Institution for the Advancement of Learning/McGill University, Hong Kong Polytechnic University
    Inventors: Masad J. Damha, Matthew Hassler, Tak-Hang Chan, Mallikarjuna Reddy Nandyala, Robert Alexander Donga
  • Publication number: 20170348258
    Abstract: This invention discloses 3-aminobenzamide derivatives as ?-lactam antibiotic adjuvants of chemical formula (I), processes for preparing them and their use. The derivatives can act as ?-lactam antibiotic adjuvants for the treatment of methicillin-resistant staphylococcal infections.
    Type: Application
    Filed: September 9, 2015
    Publication date: December 7, 2017
    Inventors: Kwok-Yin Wong, Tak-Hang Chan, Kin-Fai Chan, Sheng Chen, Hok-Kiu Lui, Jason Wing-Yiu Kan, Jia-Chi Chiou, Hong-Kin Yap
  • Publication number: 20170291887
    Abstract: Filamenting temperature-sensitive mutant Z (FtsZ) protein plays a crucial role in the bacterial cell division machinery and is a validated drug target for antibacterial agents. The present invention relates to FtsZ-interacting compounds that possess a 2,4,6-trisubstituted pyrimidine scaffold. Some of these compounds possess potent anti-staphylococcal properties and potent antibacterial activities against clinically isolated MRSA strains. Compounds have been identified to exhibit low spontaneous frequency of resistance, low toxicity as well as the ability to rescue G. mellonella larvae infected with lethal dose of the MRSA ATCC 43300 strain. Characterization by saturation transfer difference NMR, light scattering assay and GTPase hydrolysis assay with purified S. aureus FtsZ protein verified the interaction of 2,4,6-trisubstituted pyrimidine with the FtsZ protein, further confirmed by observations of iconic filamentous cell phenotype and mislocalization of the Z-ring formation.
    Type: Application
    Filed: September 29, 2016
    Publication date: October 12, 2017
    Inventors: Kwok-yin WONG, Tak-Hang CHAN, Kin-Fai CHAN
  • Publication number: 20170281591
    Abstract: Method of treating endometriosis and related indications, comprising the administration of Pro-EGCG, a synthetic and derivative product of epigallocatechin-3-gallate [(?)-EGCG]. Use of Pro-EGCG in the manufacture of a medicament for treating endometriosis and related indications. Pro-EGCG for use in the treatment of endometriosis and related indications.
    Type: Application
    Filed: June 20, 2017
    Publication date: October 5, 2017
    Inventors: Tak-Hang Chan, Chi-Chiu Wang
  • Patent number: 9713603
    Abstract: Method of treating endometriosis and related indications, comprising the administration of Pro-EGCG, a synthetic and derivative product of epigallocatechin-3-gallate [(?)-EGCG]. Use of Pro-EGCG in the manufacture of a medicament for treating endometriosis and related indications. Pro-EGCG for use in the treatment of endometriosis and related indications.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: July 25, 2017
    Assignees: The Hong Kong Polytechnic University, The Chinese University of Hong Kong
    Inventors: Tak-Hang Chan, Chi-Chiu Wang
  • Patent number: 9611256
    Abstract: A triazole bridged flavonoid dimer compound library was efficiently constructed via the cycloaddition reaction of a series of flavonoid-containing azides (Az 1-15) and alkynes (Ac 1-17). These triazole bridged flavonoid dimers and their precursor alkyne- and azide-containing flavonoids were screened for their ability to modulate multidrug resistance (MDR) in P-gp-overexpressed cell line (LCC6MDR), MRP1-overexpressed cell line (2008/MRP1) and BCRP-overexpressed cell line (HEK293/R2 and MCF7-MX100). Generally, they displayed very promising MDR reversal activity against P-gp-, MRP1- and BCRP-mediated drug resistance. Moreover, they showed different levels of selectivity for various transporters. Overall, they can be divided into mono-selective, dual-selective and multi-selective modulators for the P-gp, MRP1 and BCRP transporters.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: April 4, 2017
    Assignees: The Hong Kong Polytechnic University, McGill University
    Inventors: Larry Ming Cheung Chow, Tak Hang Chan, Kin Fai Chan, Iris Lai King Wong, Man Chun Law
  • Publication number: 20170044141
    Abstract: A triazole bridged flavonoid dimer compound library was efficiently constructed via the cycloaddition reaction of a series of flavonoid-containing azides (Az 1-15) and alkynes (Ac 1-17). These triazole bridged flavonoid dimers and their precursor alkyne- and azide-containing flavonoids were screened for their ability to modulate multidrug resistance (MDR) in P-gp-overexpressed cell line (LCC6MDR), MRP1-overexpressed cell line (2008/MRP1) and BCRP-overexpressed cell line (HEK293/R2 and MCF7-MX100). Generally, they displayed very promising MDR reversal activity against P-gp-, MRP1- and BCRP-mediated drug resistance. Moreover, they showed different levels of selectivity for various transporters. Overall, they can be divided into mono-selective, dual-selective and multi-selective modulators for the P-gp, MRP1 and BCRP transporters.
    Type: Application
    Filed: October 18, 2016
    Publication date: February 16, 2017
    Inventors: Larry Ming Cheung Chow, Tak Hang Chan, Kin Fai Chan, Iris Lai King Wong, Man Chun Law
  • Patent number: 9562037
    Abstract: The present invention relates to novel series of amine-containing flavonoids and compositions containing the compounds, as well as the synthesis and the use of the same. The invention also relates to methods of treatment and prevention of diseases, in particular, parasitic infections including Leishmaniasis, comprising administration of the compounds.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: February 7, 2017
    Assignee: The Hong Kong Polytechnic University
    Inventors: Larry Ming-Cheung Chow, William Tak Hang Chan, Kin-Fai Chan, Iris Lai King Wong, Wing-Yiu Kan