Patents by Inventor Robert Zhao

Robert 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).

  • Patent number: 12285491
    Abstract: The present invention relates to linkers having a group of propiolyl, substituted acryl (acryloyl), or disubstituted propanoyl, and using such linkers for the conjugation of compounds, in particular, cytotoxic agents to a cell-binding molecule.
    Type: Grant
    Filed: June 8, 2022
    Date of Patent: April 29, 2025
    Assignee: HANGZHOU DAC BIOTECH CO., LTD.
    Inventors: Yongxin Robert Zhao, Qingliang Yang, Yuanyuan Huang, Shun Gai, Hangbo Ye, Linyao Zhao, Chengyu Yang, Huihui Guo, Xiaomai Zhou, Hongsheng Xie, Haifeng Zhu, Yifang Xu, Qianqian Tong, Junxiang Jia, Minjun Cao, Wenjun Li, Shuihong Gao, Zhixiang Guo, Lu Bai, Chen Li, Yanlei Yang, Chunyan Wang, Zhichang Ye
  • Publication number: 20230241241
    Abstract: This invention relates to conjugates of camptothecin analogs with a cell-binding molecule of formula (I), wherein R1, R2, R3, R4, R5, X, L, n, m, T and ----- are defined herein. It also provides methods of making the conjugates of camptothecin analogs to a cell-binding agent, as well as methods of using the conjugates in targeted treatment of cancer, infection, and immunological disorders.
    Type: Application
    Filed: June 19, 2020
    Publication date: August 3, 2023
    Applicant: HANGZHOU DAC BIOTECH CO., LTD.
    Inventors: Robert ZHAO, Qingliang YANG, Hangbo YE, Yuanyuan HUANG, Yifang XU, Gengxiang ZHAO, Diancheng CHEN, Huihui GUO, Xiangfei KONG, Wenjun LI, Lu BAI, Xiang CAI, Xiuzhen ZHANG, Junxiang JIA, Zhixiang GUO, Shangma HUANG, Xiaoxu WANG, Jun ZHENG, Yong DU, Yanhua LI, Yunxia ZHENG, Chen LIN, Xiaoxiao CHEN, Wei ZHENG, Xinyan JIANG, Lingli ZHANG, Riping YE, Miaomiao CHEN
  • Publication number: 20230071112
    Abstract: The present invention relates to linkers having a group of propioloyl, substituted acryl (acryloyl), or disubstituted propanoyl, and using such linkers for the conjugation of compounds, in particular, cytotoxic agents to a cell-binding molecule.
    Type: Application
    Filed: June 8, 2022
    Publication date: March 9, 2023
    Applicant: Hangzhou DAC Biotech Co., Ltd.
    Inventors: Yongxin Robert ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Hangbo YE, Linyao ZHAO, Chengyu YANG, Huihui GUO, Xiaomai ZHOU, Hongsheng XIE, Haifeng ZHU, Yifang XU, Qianqian TONG, Junxiang JIA, Minjun CAO, Wenjun LI, Shuihong GAO, Zhixiang GUO, Lu BAI, Chen LI, Yanlei YANG, Chunyan WANG, Zhichang YE
  • Publication number: 20230025327
    Abstract: The present invention relates to the conjugates of Tubulysin derivatives (anologs) and cell-binding molecules using branched (side-chain) linkers, and the resulting conjugates have better pharmacokinetic properties, and thus can more accurately target and kill abnormal cells. The invention also relates to the conjugation methods of the Tubulysin derivatives (anologs) to cell-binding molecules, and methods for synthesizing the small molecules, and methods of using the conjugates for targeted therapy for cancers, infections and autoimmune diseases. The conjugates of Tubulysin derivatives with long branched linkers demonstrated increased half-life, minimal exposure to non-targeted cells, tissues or organs in system circulation, leading to reduced off-target toxicity.
    Type: Application
    Filed: June 29, 2019
    Publication date: January 26, 2023
    Applicant: Hangzhou DAC Biotech Co., Ltd.
    Inventors: Robert ZHAO, Qingliang YANG, Linyao ZHAO, Yuanyuan HUANG, Hangbo YE, Shun GAI, Juan LAI, Wenjun LI, Lu BAI, Minjun CAO
  • Publication number: 20220323602
    Abstract: The present invention relates to linkers having a group of propiolyl, substituted acryl (acryloyl), or disubstituted propanoyl, and using such linkers for the conjugation of compounds, in particular, cytotoxic agents to a cell-binding molecule.
    Type: Application
    Filed: June 8, 2022
    Publication date: October 13, 2022
    Applicant: Hangzhou DAC Biotech Co., Ltd.
    Inventors: Yongxin Robert ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Hangbo YE, Linyao ZHAO, Chengyu YANG, Huihui GUO, Xiaomai ZHOU, Hongsheng XIE, Haifeng ZHU, Yifang XU, Qianqian TONG, Junxiang JIA, Minjun CAO, Wenjun LI, Shuihong GAO, Zhixiang GUO, Lu BAI, Chen LI, Yanlei YANG, Chunyan WANG, Zhichang YE
  • Publication number: 20220313837
    Abstract: The present invention relates to linkers having a group of propiolyl, substituted acryl (acryloyl), or disubstituted propanoyl, and using such linkers for the conjugation of compounds, in particular, cytotoxic agents to a cell-binding molecule.
    Type: Application
    Filed: June 8, 2022
    Publication date: October 6, 2022
    Applicant: Hangzhou DAC Biotech Co., Ltd.
    Inventors: Yongxin Robert ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Hangbo YE, Linyao ZHAO, Chengyu YANG, Huihui GUO, Xiaomai ZHOU, Hongsheng XIE, Haifeng ZHU, Yifang XU, Qianqian TONG, Junxiang JIA, Minjun CAO, Wenjun LI, Shuihong GAO, Zhixiang GUO, Lu BAI, Chen LI, Yanlei YANG, Chunyan WANG, Zhichang YE
  • Publication number: 20220313838
    Abstract: The present invention relates to linkers having a group of propiolyl, substituted acryl (acryloyl), or disubstituted propanoyl, and using such linkers for the conjugation of compounds, in particular, cytotoxic agents to a cell-binding molecule.
    Type: Application
    Filed: June 8, 2022
    Publication date: October 6, 2022
    Applicant: Hangzhou DAC Biotech Co., Ltd.
    Inventors: Yongxin Robert ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Hangbo YE, Linyao ZHAO, Chengyu YANG, Huihui GUO, Xiaomai ZHOU, Hongsheng XIE, Haifeng ZHU, Yifang XU, Qianqian TONG, Junxiang JIA, Minjun CAO, Wenjun LI, Shuihong GAO, Zhixiang GUO, Lu BAI, Chen LI, Yanlei YANG, Chunyan WANG, Zhichang YE
  • Publication number: 20220313836
    Abstract: The present invention relates to linkers having a group of propiolyl, substituted acryl (acryloyl), or disubstituted propanoyl, and using such linkers for the conjugation of compounds, in particular, cytotoxic agents to a cell-binding molecule.
    Type: Application
    Filed: June 8, 2022
    Publication date: October 6, 2022
    Applicant: Hangzhou DAC Biotech Co., Ltd.
    Inventors: Yongxin Robert ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Hangbo YE, Linyao ZHAO, Chengyu YANG, Huihui GUO, Xiaomai ZHOU, Hongsheng XIE, Haifeng ZHU, Yifang XU, Qianqian TONG, Junxiang JIA, Minjun CAO, Wenjun LI, Shuihong GAO, Zhixiang GUO, Lu BAI, Chen LI, Yanlei YANG, Chunyan WANG, Zhichang YE
  • Publication number: 20220249594
    Abstract: A formulation of conjugates of tubulysin analogs with a cell-binding molecule having a structure represented by Formula (I), wherein T, L, m, n, ----, R1, R2, R3, R4, R1, R6, R7, R1, R9, R10, R11, R12, and R13 are as defined herein, can be used for targeted treatment of cancer, autoimmune disease, and infectious disease.
    Type: Application
    Filed: February 18, 2020
    Publication date: August 11, 2022
    Applicant: HANGZHOU DAC BIOTECH CO., LTD
    Inventors: Robert ZHAO, Qingliang YANG, Yuanyuan HUANG, Shun GAI, Hangbo YE, Linyao ZHAO, Huihui GUO, Lu BAI, Wenjun LI, Junxiang JIA, Zhixiang GUO, Jun ZHENG, Xiaoxiao CHEN, Xiangfei KONG, Chen LIN, Yong DU, Yu ZHANG, Lei ZHOU, Xiuzhen ZHANG, Xiuhong ZHENG, Binbin CHEN, Yanlei YANG, Meng DAI, Yifang XU, Zhongliang FAN, Xiaomai ZHOU, Xingyan JIANG, Miaomiao CHEN, Lingli ZHANG, Yanhua LI
  • Publication number: 20210308277
    Abstract: The present invention relates to linkers having a group of propiolyl, substituted acryl(acryloyl), or disubstituted propanoyl, and using such linkers for the conjugation of compounds, in particular, cytotoxic agents to a cell-binding molecule.
    Type: Application
    Filed: November 14, 2016
    Publication date: October 7, 2021
    Applicant: Hangzhou DAC Biotech Co., Ltd.
    Inventors: Yongxin Robert Zhao, Qingliang Yang, Yuanyuan Huang, Shun Gai, Hangbo Ye, Linyao Zhao, Chengyu Yang, Huihui Guo, Xiaomai Zhou, Hongsheng Xie, Haifeng Zhu, Yifang Xu, Qianqian Tong, Junxiang Jia, Minjun Cao, Wenjun Li, Shuihong Gao, Zhixiang Guo, Lu Bai, Chen LI, Yanlei YANG, Chunyan WANG, Zhichang YE
  • Publication number: 20130175711
    Abstract: A UV sterilization chamber is provided to a humidifier having a water reservoir, a humidifying element and a pathway for directing water provided by the water reservoir to the humidifying element of the humidifier. The pathway is provided in a humidifier base, over which a humidifier enclosure is removably placed. The UV sterilization chamber includes a serpentine portion of the pathway and a UV radiation source positioned for illuminating the portion of the pathway with UV light. Upwardly-directed projections in the base border a perimeter of the pathway; and a downwardly-directed projection of the UV radiation source extends between the upwardly-directed projections when the enclosure is mated with the base, thereby locating the UV radiation source over the portion of the pathway. A switch disables the UV radiation source when the enclosure is removed from the base.
    Type: Application
    Filed: September 10, 2012
    Publication date: July 11, 2013
    Applicant: Kaz USA, Inc.
    Inventors: Francis C. NUTTER, Zhijing Wang, Robert Zhao, Edison Lu, Yongming Sun, Sean Wang, Christopher S. Kanel
  • Patent number: 8426402
    Abstract: 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: Grant
    Filed: February 4, 2010
    Date of Patent: April 23, 2013
    Assignee: ImmunoGen, Inc.
    Inventors: Wei Li, Nathan Fishkin, Robert Zhao, Michael Miller, Ravi Chari
  • Publication number: 20120319311
    Abstract: A UV sterilization chamber is provided to a humidifier having a water reservoir, a humidifying element and a pathway for directing water provided by the water reservoir to the humidifying element of the humidifier. The pathway is provided in a humidifier base, over which a humidifier enclosure is removably placed. The UV sterilization chamber includes a serpentine portion of the pathway and a UV radiation source positioned for illuminating the portion of the pathway with UV light. Upwardly-directed projections in the base border a perimeter of the pathway; and a downwardly-directed projection of the UV radiation source extends between the upwardly-directed projections when the enclosure is mated with the base, thereby locating the UV radiation source over the portion of the pathway. A switch disables the UV radiation source when the enclosure is removed from the base.
    Type: Application
    Filed: October 20, 2010
    Publication date: December 20, 2012
    Applicant: KAZ USA, INC
    Inventors: Francis C Nutter, Zhijing Wang, Robert Zhao, Edisen Lu, Yongming Sun, Sean Wang, Christopher S. Kanel
  • Patent number: 8163736
    Abstract: The present invention is related to new tomaymycin derivatives, their process of preparation and their therapeutic uses.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: April 24, 2012
    Assignee: sanofi-aventis
    Inventors: Laurence Gauzy, Herve Bouchard, Ravi V. J. Chari, Alain Commercon, Robert Zhao, Yonghong Deng, Wei Li
  • Publication number: 20110280890
    Abstract: The present invention provides prodrugs of analogs of the anti-tumor antibiotic CC-1065 having a cleavable protective group containing a sulfonic acid containing phenyl carbamate, in which the protecting group confers enhanced water solubility upon the prodrug, and in which the prodrug also has a moiety, such as a sulfide or a disulfide, that can conjugate to a cell binding reagent such as an antibody, and for the therapeutic use of such prodrug and conjugates, and for processes for preparing such prodrugs and conjugates.
    Type: Application
    Filed: July 15, 2011
    Publication date: November 17, 2011
    Applicant: IMMUNOGEN, INC.
    Inventors: Robert ZHAO, Ravi V. J. CHARI
  • Patent number: 8012978
    Abstract: The present invention provides prodrugs of analogs of the anti-tumor antibiotic CC-1065 having a cleavable protective group containing a sulfonic acid containing phenyl carbamate, in which the protecting group confers enhanced water solubility upon the prodrug, and in which the prodrug also has a moiety, such as a sulfide or a disulfide, that can conjugate to a cell binding reagent such as an antibody, and for the therapeutic use of such prodrug and conjugates, and for processes for preparing such prodrugs and conjugates.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: September 6, 2011
    Assignee: ImmunoGen, Inc.
    Inventors: Robert Zhao, Ravi V. J. Chari
  • Publication number: 20100203007
    Abstract: 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: Application
    Filed: February 4, 2010
    Publication date: August 12, 2010
    Applicant: Immunogen Inc.
    Inventors: Wei Li, Nathan Fishkin, Robert Zhao, Michael Miller, Ravi Chari
  • Publication number: 20090036431
    Abstract: The present invention is related to new tomaymycin derivatives, their process of preparation and their therapeutic uses.
    Type: Application
    Filed: July 16, 2008
    Publication date: February 5, 2009
    Applicant: SANOFI-AVENTIS
    Inventors: Laurence GAUZY, Herve BOUCHARD, Ravi V.J. CHARI, Alain COMMERCON, Robert ZHAO, Yonghong DENG, Wei LI
  • Publication number: 20090028821
    Abstract: The present invention provides prodrugs of analogs of the anti-tumor antibiotic CC-1065 having a cleavable protective group containing a sulfonic acid containing phenyl carbamate, in which the protecting group confers enhanced water solubility upon the prodrug, and in which the prodrug also has a moiety, such as a sulfide or a disulfide, that can conjugate to a cell binding reagent such as an antibody, and for the therapeutic use of such prodrug and conjugates, and for processes for preparing such prodrugs and conjugates.
    Type: Application
    Filed: September 4, 2008
    Publication date: January 29, 2009
    Applicant: SANOFI-AVENTIS
    Inventors: Robert Zhao, Ravi V.J. Chari
  • Publication number: 20070135346
    Abstract: Prodrugs of analogs of the anti-tumor antibiotic CC-1065 having a cleavable protective group such as a piperazino carbamate, a 4-piperidino-piperidino carbamate or a phosphate, in which the protecting group confers enhanced water solubility and stability upon the prodrug, and in which the prodrug also has a moiety, such as a disulfide, that can conjugate to a cell binding reagent such as an antibody. The therapeutic use of such prodrug conjugates is also described; such prodrugs of cytotoxic agents have therapeutic use because they can deliver cytotoxic prodrugs to a specific cell population for enzymatic conversion to cytoxic drugs in a targeted fashion.
    Type: Application
    Filed: January 5, 2007
    Publication date: June 14, 2007
    Inventors: Robert Zhao, Ravi Chari