Patents by Inventor Robert Yongxin Zhao
Robert Yongxin Zhao 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).
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Patent number: 11779663Abstract: The present invention relates to novel linkers containing a 2,3-disubstituted succinic group, or 2-monosubstituted, or 2,3-disubstituted fumaric or maleic (trans (E)- or cis (Z)-butenedioic), or acetylenedicarboxyl group for conjugation of a cytotoxic agent, and/or one or more different functional molecules per linker to a cell-binding molecule, through bridge linking pairs of thiols on the cell-binding molecule specifically. The invention also relates to methods of making such linkers, and of using such linkers in making homogeneous conjugates, as well as of application of the conjugates in treatment of cancers, infections and autoimmune disorders.Type: GrantFiled: November 9, 2020Date of Patent: October 10, 2023Assignee: HANGZHOU DAC BIOTECH CO., LTD.Inventors: Robert Yongxin Zhao, Qingliang Yang, Yuanyuan Huang, Shun Gai, Linyao Zhao, Hangbo Ye, Huihui Guo, Qianqian Tong, Minjun Cao, Junxiang Jia, Chengyu Yang, Wenjun Li, Xiaomai Zhou, Hongsheng Xie, Chen Lin, Zhixiang Guo, Zhicang Ye
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Publication number: 20230165930Abstract: Described is a conjugation of a tubulysin analog compound to a cell-binding molecule with branched/side-chain linkers for having better delivery of the conjugate compound and targeted treatment of abnormal cells. Also described are a branched-linkage method of conjugation of a tubulysin analog molecule to a cell-binding ligand, as well as methods of using the conjugate in targeted treatment of cancer, infection and autoimmune disease.Type: ApplicationFiled: January 19, 2023Publication date: June 1, 2023Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Qingliang YANG, Yuanyuan HUANG, Linyao ZHAO, Shun GAI, Hangbo YE, Jun LEI, Yifang XU, Mingjun CAO, Huihui GUO, Junxiang JIA, Qianqian TONG, Wenjun LI, Xiaomai ZHOU, Hongsheng XIE, Lu BAI, Xiang CAI, Xiaotao ZHUO, Xiuzheng ZHANG, Jun ZHENG
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Publication number: 20230165931Abstract: Described is a conjugation of a tubulysin analog compound to a cell-binding molecule with branched/side-chain linkers for having better delivery of the conjugate compound and targeted treatment of abnormal cells. Also described are a branched-linkage method of conjugation of a tubulysin analog molecule to a cell-binding ligand, as well as methods of using the conjugate in targeted treatment of cancer, infection and autoimmune disease.Type: ApplicationFiled: January 19, 2023Publication date: June 1, 2023Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Qingliang YANG, Yuanyuan HUANG, Linyao ZHAO, Shun GAI, Hangbo YE, Jun LEI, Yifang XU, Mingjun CAO, Huihui GUO, Junxiang JIA, Qianqian TONG, Wenjun LI, Xiaomai ZHOU, Hongsheng XIE, Lu BAI, Xiang CAI, Xiaotao ZHUO, Xiuzheng ZHANG, Jun ZHENG
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Publication number: 20230149502Abstract: Described is a conjugation of a tubulysin analog compound to a cell-binding molecule with branched/side-chain linkers for having better delivery of the conjugate compound and targeted treatment of abnormal cells. Also described are a branched-linkage method of conjugation of a tubulysin analog molecule to a cell-binding ligand, as well as methods of using the conjugate in targeted treatment of cancer, infection and autoimmune disease.Type: ApplicationFiled: January 19, 2023Publication date: May 18, 2023Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Qingliang YANG, Yuanyuan HUANG, Linyao ZHAO, Shun GAI, Hangbo YE, Jun LEI, Yifang XU, Mingjun CAO, Huihui GUO, Junxiang JIA, Qianqian TONG, Wenjun LI, Xiaomai ZHOU, Hongsheng XIE, Lu BAI, Xiang CAI, Xiaotao ZHUO, Xiuzheng ZHANG, Jun ZHENG
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Publication number: 20230115871Abstract: The present invention relates to the conjugation of cytotoxic drug to a cell-binding molecule with a side-chain linker. It provides side-chain linkage methods of making a conjugate of a cytotoxic molecule to a cell-binding ligand, as well as methods of using the conjugate in targeted treatment of cancer, infection and immunological disorders.Type: ApplicationFiled: June 24, 2019Publication date: April 13, 2023Applicant: Hangzhou DAC Biotech Co., LtdInventors: Robert Yongxin ZHAO, Qingliang YANG, Linyao ZHAO, Yuanyuan HUANG, Hangbo YE, Shun GAI, Junxiang JIA, Lu BAI, Wenjun LI, Zhixiang GUO, Chen LIN, Jun ZHENG, Huihui GUO, Minjun CAO, Xiangfei KONG, Yong DU, Yifang XU, Xiaomai ZHOU, Hongsheng XIE, Xiuzhen ZHANG, Miaomiao CHEN, Xiaolei LIU, Xiang CAI, Binbin CHEN, Yanlei YANG, Lingli ZHANG
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Publication number: 20230057350Abstract: Provided herein is the conjugation of an amanita toxin compound to a cell-binding molecule with branched linkers for having better targeted treatment of abnormal cells. It also relates to a branched-linkage method of conjugation of an amanita molecule to a cell-binding ligand, as well as methods of using the conjugate in targets treatment of cancer, infection and autoimmune disease.Type: ApplicationFiled: January 31, 2019Publication date: February 23, 2023Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Qingliang YANG, Jun LEI, Yuanyuan HUANG, Linyao ZHAO, Hangbo YE, Shun GAI, Mingjun CAO, Qianqian TONG, Lu BAI, Zhixiang GUO, Chengyu YANG, Xiaomai ZHOU, Hongsheng XIE, Yifang XU, Huihui GUO, Junxiang JIA, Jun ZHENG, Cheng LIN, Xiaotao ZHUO, Wenjun LI, Yong DU, Xiangfei KONG, Binbin CHEN, Yanlei YANG, Yanhong TONG, Xiaoxiao CHEN, Yanhua LI, Xiuzheng ZHANG, Juan LAI
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Publication number: 20230010108Abstract: The present invention relates to a conjugate of a cytotoxic drug/molecule to a cell-binding molecule with a bis-linker (a dual-linker) containing a 2,3-diaminosuccinyl group. It also relates to preparation of the conjugate of a cytotoxic drug/molecule to a cell-binding molecule with the bis-linker, particularly when the drug having functional groups of amino, hydroxyl, diamino, amino-hydroxyl, dihydroxyl, carboxyl, hydrazine, aldehyde and thiol for conjugation with the bis-linker in a specific manner, as well as the therapeutic use of the conjugates.Type: ApplicationFiled: October 12, 2018Publication date: January 12, 2023Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Qingliang YANG, Yuanyuan HUANG, Linyao ZHAO, Hangbo YE, Xiaotao ZHUO, Chengyu YANG, Jun LEI, Yifang XU, Huihui GUO, Wenjun LI, Shun GAI, Lu BAI, Zhixiang GUO, Junxiang JIA, Jun ZHENG, Xiaomai ZHOU, Hongsheng XIE, Qianqian TONG, Mingjun CHAO, Yanhong TONG, Zhicang YE, Chen LIN, Yanlei YANG, Binbin CHEN
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Publication number: 20230001001Abstract: A conjugation of a cytotoxic drug to a cell-binding molecule with a bis-linker (dual-linker) as shown in Formula (I). Bis-linkage methods of making a conjugate of a cytotoxic drug/molecule to a cell-binding agent in a specific manner are also described, as well as application of the conjugates for the treatment of a cancer, or an autoimmune disease, or an infectious disease. wherein “” is an optional bond; X, Y, Z1, and Z2 are a functional group; m1 and n are a integer; L1 and L2 are a linker.Type: ApplicationFiled: July 30, 2021Publication date: January 5, 2023Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Yuanyuan HUANG, Qingliang YANG, Shun GAI, Hangbo YE, Linyao ZHAO, Chengyu YANG, Yifang XU, Huihui GUO, Minjun CHAO, Qianqian TONG, Wenjun LI, Xiang CAI, Xiaomai ZHOU, Hongsheng XIE, Junxiang JIA, Haifeng ZHU, Zhixiang GUO, Shuihong GAO, Chunyan WANG, Chen LIN, Yanlei YANG, Zhicang YE, Jie PENG, Jun XU, Xiaotao ZUO, Qingyu SU
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Publication number: 20220378951Abstract: The present invention relates to novel linkers containing a 2,3-disubstituted succinic group, or 2-monosubstituted, or 2,3-disubstituted fumaric or maleic (trans (E)- or cis (Z)-butenedioic), or acetylenedicarboxyl group for conjugation of a cytotoxic agent, and/or one or more different functional molecules per linker to a cell-binding molecule, through bridge linking pairs of thiols on the cell-binding molecule specifically. The invention also relates to methods of making such linkers, and of using such linkers in making homogeneous conjugates, as well as of application of the conjugates in treatment of cancers, infections and autoimmune disorders.Type: ApplicationFiled: June 23, 2021Publication date: December 1, 2022Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Linyao ZHAO, Hangbo YE, Huihui GUO, Qianqian TONG, Minjun CAO, Junxiang JIA, Chengyu YANG, Wenjun LI, Xiaomai ZHOU, Hongsheng XIE, Chen LIN, Zhixiang GUO, Zhicang YE
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Patent number: 11505617Abstract: The invention relates to novel benzodiazepine derivatives with antiproliferative activity and more specifically to novel benzodiazepines of formula (I) and (II), in which the diazepine ring (B) is fused with a heterocyclic ring (CD), wherein the heterocyclic ring is bicyclic or a compound of formula (III), in which the diazepine ring (B) is fused with a heterocyclic ring (C), wherein the heterocyclic ring is monocyclic. The invention provides cytotoxic dimers of these compounds. The invention also provides conjugates of the monomers and the dimers. The invention further provides compositions and methods useful for inhibiting abnormal cell growth or treating a proliferative disorder in a mammal using the compounds or conjugates of the invention. The invention further relates to methods of using the compounds or conjugates for in vitro, in situ, and in vivo diagnosis or treatment of mammalian cells, or associated pathological conditions.Type: GrantFiled: January 7, 2021Date of Patent: November 22, 2022Assignee: IMMUNOGEN, INC.Inventors: Wei Li, Nathan Elliott Fishkin, Robert Yongxin Zhao, Michael Louis Miller, Ravi V. J. Chari
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Publication number: 20210393790Abstract: A conjugation of a cytotoxic drug to a cell-binding molecule with a bis-linker (dual-linker) as shown in Formula (I). Bis-linkage methods of making a conjugate of a cytotoxic drug/molecule to a cell-binding agent in a specific manner are also described, as well as application of the conjugates for the treatment of a cancer, or an autoimmune disease, or an infectious disease. wherein “” is an optional bond; X, Y, Z1, and Z2 are a functional group; m1 and n are a integer; L1 and L2 are a linker.Type: ApplicationFiled: July 30, 2021Publication date: December 23, 2021Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Yuanyuan HUANG, Qingliang YANG, Shun GAI, Hangbo YE, Linyao ZHAO, Chengyu YANG, Yifang XU, Huihui GUO, Minjun CHAO, Qianqian TONG, Wenjun LI, Xiang CAI, Xiaomai ZHOU, Hongsheng XIE, Junxiang JIA, Haifeng ZHU, Zhixiang GUO, Shuihong GAO, Chunyan WANG, Chen LIN, Yanlei YANG, Zhicang YE, Jie PENG, Jun XU, Xiaotao ZUO, Qingyu SU
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Publication number: 20210369855Abstract: A conjugation of a cytotoxic drug to a cell-binding molecule with a bis-linker (dual-linker) as shown in Formula (I). Bis-linkage methods of making a conjugate of a cytotoxic drug/molecule to a cell-binding agent in a specific manner are also described, as well as application of the conjugates for the treatment of a cancer, or an autoimmune disease, or an infectious disease. wherein “” is an optional bond; X, Y, Z1, and Z2 are a functional group; m1 and n are a integer; L1 and L2 are a linker.Type: ApplicationFiled: July 28, 2021Publication date: December 2, 2021Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Yuanyuan HUANG, Qingliang YANG, Shun GAI, Hangbo YE, Linyao ZHAO, Chengyu YANG, Yifang XU, Huihui GUO, Minjun CHAO, Qianqian TONG, Wenjun LI, Xiang CAI, Xiaomai ZHOU, Hongsheng XIE, Junxiang JIA, Haifeng ZHU, Zhixiang GUO, Shuihong GAO, Chunyan WANG, Chen LIN, Yanlei YANG, Zhicang YE, Jie PENG, Jun XU, Xiaotao ZUO, Qingyu SU
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Publication number: 20210353777Abstract: The present invention relates to novel linkers containing a 2,3-disubstituted succinic group, or 2-monosubstituted, or 2,3-disubstituted fumaric or maleic (trans (E)- or cis (Z)-butenedioic), or acetylenedicarboxyl group for conjugation of a cytotoxic agent, and/or one or more different functional molecules per linker to a cell-binding molecule, through bridge linking pairs of thiols on the cell-binding molecule specifically. The invention also relates to methods of making such linkers, and of using such linkers in making homogeneous conjugates, as well as of application of the conjugates in treatment of cancers, infections and autoimmune disorders.Type: ApplicationFiled: July 13, 2021Publication date: November 18, 2021Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Linyao ZHAO, Hangbo YE, Huihui GUO, Qianqian TONG, Minjun CAO, Junxiang JIA, Chengyu YANG, Wenjun LI, Xiaomai ZHOU, Hongsheng XIE, Chen LIN, Zhixiang GUO, Zhicang YE
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Publication number: 20210346523Abstract: The present invention relates to novel linkers containing a 2,3-disubstituted succinic group, or 2-monosubstituted, or 2,3-disubstituted fumaric or maleic (trans (E)- or cis (Z)-butenedioic), or acetylenedicarboxyl group for conjugation of a cytotoxic agent, and/or one or more different functional molecules per linker to a cell-binding molecule, through bridge linking pairs of thiols on the cell-binding molecule specifically. The invention also relates to methods of making such linkers, and of using such linkers in making homogeneous conjugates, as well as of application of the conjugates in treatment of cancers, infections and autoimmune disorders.Type: ApplicationFiled: July 13, 2021Publication date: November 11, 2021Applicant: Hangzhou DAC Biotech Co., Ltd.Inventors: Robert Yongxin ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Linyao ZHAO, Hangbo YE, Huihui GUO, Qianqian TONG, Minjun CAO, Junxiang JIA, Chengyu YANG, Wenjun LI, Xiaomai ZHOU, Hongsheng XIE, Chen LIN, Zhixiang GUO, Zhicang YE
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Patent number: 11129910Abstract: The present invention relates to novel linkers containing a 2,3-disubstituted succinic group, or 2-monosubstituted, or 2,3-disubstituted fumaric or maleic (trans (E)- or cis (Z)-butenedioic), or acetylenedicarboxyl group for conjugation of a cytotoxic agent, and/or one or more different functional molecules per linker to a cell-binding molecule, through bridge linking pairs of thiols on the cell-binding molecule specifically. The invention also relates to methods of making such linkers, and of using such linkers in making homogeneous conjugates, as well as of application of the conjugates in treatment of cancers, infections and autoimmune disorders.Type: GrantFiled: February 4, 2016Date of Patent: September 28, 2021Assignee: HANGZHOU DAC BIOTECH CO., LTD.Inventors: Robert Yongxin Zhao, Qingliang Yang, Yuanyuan Huang, Shun Gai, Linyao Zhao, Hangbo Ye, Huihui Guo, Qianqian Tong, Minjun Cao, Junxiang Jia, Chengyu Yang, Wenjun Li, Xiaomai Zhou, Hongsheng Xie, Chen Lin, Zhixiang Guo, Zhicang Ye
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Publication number: 20210238301Abstract: The invention relates to novel benzodiazepine derivatives with antiproliferative activity and more specifically to novel benzodiazepines of formula (I) and (II), in which the diazepine ring (B) is fused with a heterocyclic ring (CD), wherein the heterocyclic ring is bicyclic or a compound of formula (III), in which the diazepine ring (B) is fused with a heterocyclic ring (C), wherein the heterocyclic ring is monocyclic. The invention provides cytotoxic dimers of these compounds. The invention also provides conjugates of the monomers and the dimers. The invention further provides compositions and methods useful for inhibiting abnormal cell growth or treating a proliferative disorder in a mammal using the compounds or conjugates of the invention. The invention further relates to methods of using the compounds or conjugates for in vitro, in situ, and in vivo diagnosis or treatment of mammalian cells, or associated pathological conditions.Type: ApplicationFiled: January 7, 2021Publication date: August 5, 2021Inventors: Wei Li, Nathan Elliott Fishkin, Robert Yongxin Zhao, Michael Louis Miller, Ravi V.J. Chari
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Patent number: 11046762Abstract: Charged or pro-charged cross-linking moieties and conjugates of cell binding agents and drugs comprising the charged or pro-charged cross-linking moieties and method of making the same.Type: GrantFiled: October 14, 2019Date of Patent: June 29, 2021Assignee: IMMUNOGEN, INC.Inventors: Ravi V. J. Chari, Robert Yongxin Zhao, Yelena Kovtun, Rajeeva Singh, Wayne C. Widdison
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Publication number: 20210169896Abstract: The present invention relates to novel cross-linked cytotoxic agents, pyrrolobenzodiazepine dimer (PBD) derivatives, and their conjugates to a cell-binding molecule, a method for preparation of the conjugates and the therapeutic use of the conjugates.Type: ApplicationFiled: July 5, 2018Publication date: June 10, 2021Inventors: Robert Yongxin ZHAO, Xiaotao ZHUO, Qingliang YANG, Linyao ZHAO, Yuanyuan HUANG, Hangbo YE, Chengyu YANG, Jun LEI, Shun GAI, Huihui GUO, Junxiang JIA, Lu BAI, Hongsheng XIE, Xiaomai ZHOU, Zhixiang GUO, Wenjun LI, Mingjun CAO, Jun ZHENG, Zhicang YE, Yanlei YANG
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Patent number: 10975112Abstract: Cell binding agent-drug conjugates comprising hydrophilic linkers, and methods of using such linkers and conjugates are provided.Type: GrantFiled: June 16, 2015Date of Patent: April 13, 2021Assignee: HANGZHOU DAC BIOTECH CO., LTD.Inventor: Robert Yongxin Zhao
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Patent number: 10947315Abstract: The invention relates to novel benzodiazepine derivatives with antiproliferative activity and more specifically to novel benzodiazepines of formula (I) and (II), in which the diazepine ring (B) is fused with a heterocyclic ring (CD), wherein the heterocyclic ring is bicyclic or a compound of formula (III), in which the diazepine ring (B) is fused with a heterocyclic ring (C), wherein the heterocyclic ring is monocyclic. The invention provides cytotoxic dimers of these compounds. The invention also provides conjugates of the monomers and the dimers. The invention further provides compositions and methods useful for inhibiting abnormal cell growth or treating a proliferative disorder in a mammal using the compounds or conjugates of the invention. The invention further relates to methods of using the compounds or conjugates for in vitro, in situ, and in vivo diagnosis or treatment of mammalian cells, or associated pathological conditions.Type: GrantFiled: December 21, 2018Date of Patent: March 16, 2021Assignee: IMMUNOGEN, INC.Inventors: Wei Li, Nathan Elliott Fishkin, Robert Yongxin Zhao, Michael Louis Miller, Ravi V. J. Chari