Patents by Inventor Xiquan Zhang

Xiquan Zhang 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: 20240101551
    Abstract: A crystal form and salt form of a bromine domain protein inhibitor represented by formula (I), a preparation method therefor, and a use of the crystal form and salt form in the preparation of a drug for treating diseases mediated by BET protein.
    Type: Application
    Filed: January 19, 2021
    Publication date: March 28, 2024
    Applicants: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD., SHOUYAO HOLDINGS (BEIJING) CO., LTD.
    Inventors: Wenwei XU, Zhenliang SHAN, Yingya ZHANG, Guoliang ZHANG, Yun GE, Aiming ZHANG, Xiquan ZHANG
  • Publication number: 20240043401
    Abstract: A salt form of a tetra-substituted olefin compound, a crystal of the compound and the salt, and a preparation method relating to a crystal of a compound represented by formula (I), a salt thereof, a crystal of the salt thereof, and a preparation method therefor.
    Type: Application
    Filed: December 30, 2021
    Publication date: February 8, 2024
    Applicant: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Shuwen DUAN, Jianyu LU, Ting YAO, Lihong HU, Charles Z. DING, Jian LI, Shuhui CHEN, Xiquan ZHANG
  • Patent number: 11881931
    Abstract: A data transmission time obtaining method, apparatus, and system are provided. The method includes: A first device sends a first packet to a second device, and obtains a first send timestamp of the first packet; the first device receives a second packet that is sent by the second device and that corresponds to the first packet, and obtains a first receive timestamp of the second packet; the first device calculates, based on timing frequency of the second device, a second receive timestamp at which the second device receives the first packet and a second send timestamp at which the second device sends the second packet; and the first device calculates a data transmission time between the first device and the second device based on the first send timestamp, the first receive timestamp, the second send timestamp, and the second receive timestamp.
    Type: Grant
    Filed: March 16, 2022
    Date of Patent: January 23, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xiquan Zhang, Jun Guo, Weixian Zhang
  • Patent number: 11866433
    Abstract: The present application belongs to the field of medicine. In particular, the present application relates to a diarylthiohydantoin compound as an androgen receptor antagonist or a pharmaceutically acceptable salt thereof, a preparation method of the same, a pharmaceutical composition comprising the compound, and a use thereof in treating a cell proliferative disease mediated by androgen. The compound of the present application has good antagonistic effect on androgen receptor and exhibits excellent antitumor effect.
    Type: Grant
    Filed: October 15, 2021
    Date of Patent: January 9, 2024
    Assignee: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Chunli Shen, Chengde Wu, Shenglin Chen, Shuhui Chen, Xiquan Zhang, Xin Tian
  • Publication number: 20230405141
    Abstract: Provided is an antibody drug conjugate, specifically comprising a therapeutic antibody moiety, an intermediate linker moiety and a cytotoxic drug moiety which are linked. The therapeutic antibody moiety is an antibody against an HER2 target. The cytotoxic drug moiety is a camptothecin topoisomerase I inhibitor. The cytotoxic drug moiety or the linker-cytotoxic drug moiety is modified by means of deuterium substitution. The antibody drug conjugate can be used for the prevention or treatment of cancers.
    Type: Application
    Filed: August 13, 2021
    Publication date: December 21, 2023
    Inventors: Xiquan ZHANG, Tianxi CHEN, Weiwei FENG, Bing ZHANG, Xiaoqi TANG, Tongjie XU, Xiaojin WANG, Huace SHENG, Zhengping ZHANG, Hua WANG, Yong GAO
  • Publication number: 20230331699
    Abstract: A preparation method for a CDK4/6 inhibitor for a compound of formula (I): 5-fluoro-4-(3-isopropyl-2-methyl-2H-indazol-5-yl)-N-(5-(piperazin-1-yl)pyrazol-2-yl)pyrimidine-2-amine. The preparation method has cheap and readily available starting materials and reagents, greatly simplified total reaction steps, shortened reaction time, improved total yield and a high purity of the key intermediate and final product, being suitable for industrial production.
    Type: Application
    Filed: June 21, 2021
    Publication date: October 19, 2023
    Applicant: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Guofeng LIU, Yong WANG, Meng GUO, Xiquan ZHANG, Kaizhen SONG, Jinhu LIU, Junshan LUO
  • Publication number: 20230310596
    Abstract: The present invention belongs to the field of biomedicines, relates to a drug for treating tumors, and provides use of an anti-PD-L1 antibody or a pharmaceutical composition thereof in preparation of a drug for treating endometrial cancer. Also provided is use of the anti-PD-L1 antibody or the pharmaceutical composition thereof in preparation of a drug for treating a MSI-H and/or dMMR tumor. In addition, also provided is use of a pharmaceutical combination of the anti-PD-L1 antibody and Anlotinib or a pharmaceutically acceptable salt thereof, or a pharmaceutical composition thereof in preparation of a drug for treating endometrial cancer.
    Type: Application
    Filed: June 30, 2021
    Publication date: October 5, 2023
    Inventors: Nan SU, Xiquan ZHANG, Jie CHEN, Xunqiang WANG, Kun LI, Ding YU, Rongliang WANG
  • Publication number: 20230272086
    Abstract: Provided is an ST2 antigen binding protein, such as a mouse, human, chimeric or humanized antibody or antigen binding fragment thereof that specifically binds to ST2. Also provided are nucleic acid molecules encoding the above-mentioned antibodies and antigen binding fragments thereof, and an expression vector and host cell for expressing the antibodies or antigen binding fragments thereof. Further provided are methods for preparing and using the antibodies and antigen binding fragments thereof. The methods comprise treating and preventing IL33/ST2-mediated related diseases or conditions.
    Type: Application
    Filed: May 11, 2021
    Publication date: August 31, 2023
    Inventors: Zhengping Zhang, Shusong Ying, Hongjiang Xu, Ling Yang, Xiquan Zhang, Jun Guo, Wei Shi, Wei Song, Yunyan Zhou
  • Publication number: 20230263795
    Abstract: Provided are a combined pharmaceutical composition of an anti-PD-L1 antibody and a c-Met kinase inhibitor, specifically, a combined pharmaceutical composition of an anti-PD-L1 antibody and N-(4-((7-((1-(cyclopentylamino)cyclopropyl)methoxy)-6-methoxyquinolin-4-yl)oxy)-3-fluorophenyl)-N-(4-fluorophenyl)cyclopropane-1,1-dicarboxamide, and the use of the combined pharmaceutical composition in the treatment of cancers, in particular, gastric cancer or liver cancer.
    Type: Application
    Filed: June 1, 2021
    Publication date: August 24, 2023
    Inventors: Xiquan ZHANG, Xunqiang Wang, Ding Yu, Tao LIU, Xiaole ZHAN, Naiying WU
  • Publication number: 20230265181
    Abstract: An immunoglobulin single variable domain and antigen binding molecule binding BCMA, specifically comprising an immunoglobulin single variable domain and antigen binding molecule, a nucleic acid for encoding the binding molecule, a vector containing the nucleic acid, a cell containing the vector, and a pharmaceutical composition containing the above.
    Type: Application
    Filed: August 16, 2021
    Publication date: August 24, 2023
    Applicant: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Zipeng ZHEN, Meijuan XIE, Xiuzhen DU, Yimin MA, Bing ZHANG, Tongjie XU, Xiquan ZHANG
  • Publication number: 20230242632
    Abstract: Disclosed are antigen binding constructs targeting HER2 and uses thereof. Specifically provided are antigen binding constructs, a nucleic acid that encodes same, a vector that comprises said nucleic acid, a cell that comprises said vector, and a pharmaceutical composition that comprises the foregoing. Further provided are uses thereof in aspects such as treating subjects who suffer from HER2-expressing tumors, killing HER2-expressing tumor cells, or inhibiting the growth of HER2-expressing tumor cells.
    Type: Application
    Filed: April 29, 2021
    Publication date: August 3, 2023
    Inventors: Bing Zhang, Wei Zhao, Min Du, Yamin Lu, Yimin Ma, Xiuzhen Du, Na Lu, Zhaoxiong Ma, Xiquan Zhang
  • Publication number: 20230235057
    Abstract: Provided in the present disclosure are a bifunctional protein which can bind to PD-1 (programmed death receptor-1) and TGF-? (transforming growth factor-?), the medical use of the bifunctional protein, and a preparation method therefor.
    Type: Application
    Filed: April 26, 2021
    Publication date: July 27, 2023
    Applicant: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: WEI ZHAO, YINGCHUN Ll, HAILI LV, LIANXIANG XIE, ZHEWEN ZHANG, YU QIN, XIQUAN ZHANG, YANJU CHENG, PENG LV, TIANTIAN LI
  • Publication number: 20230227556
    Abstract: The present invention relates to the field of biomedicines. Disclosed is a combination drug for treating kidney cancer, comprising an anti-PD-L1 antibody and anlotinib or a pharmaceutically acceptable salt thereof. The present invention also provides use of the combination drug in the preparation of drugs for treating kidney cancer.
    Type: Application
    Filed: April 30, 2021
    Publication date: July 20, 2023
    Inventors: Anqi YANG, Xiquan ZHANG, Xunqiang WANG, Ding YU, Lin LI, Rongliang WANG
  • Patent number: 11702439
    Abstract: The present application relates to a method for preparing trifluridine, comprising reacting a compound of formula III with a compound of formula IV in a first solvent in the presence of an acid to obtain a compound of formula II, and performing further reaction to obtain trifluridine.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: July 18, 2023
    Assignee: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Lin Liu, Rui Zhao, Guangming Sang, Xingjian Zhou, Xiaopeng Guo, Aiming Zhang, Gang Wu, Chunguang Xia, Xiquan Zhang
  • Publication number: 20230193292
    Abstract: A BCMA-binding immunoglobulin single variable structural domain and an antigen-binding molecule including an immunoglobulin single variable structural domain and an antigen-binding molecule, a nucleic acid encoding the above, a vector containing the nucleic acid, a cell containing the vector, and a pharmaceutical composition containing the above, as well as a therapeutic use thereof.
    Type: Application
    Filed: August 16, 2021
    Publication date: June 22, 2023
    Applicant: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Zipeng ZHEN, Meijuan XIE, Xiuzhen DU, Yimin MA, Bing ZHANG, Tongjie XU, Xiquan ZHANG
  • Publication number: 20230133735
    Abstract: The present invention relates to use of a pyrrolopyrimidine compound for treating hemophagocytic syndrome, and particularly relates to use of a compound of formula (I), a stereoisomer thereof, or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition thereof for treating hemophagocytic syndrome.
    Type: Application
    Filed: March 9, 2021
    Publication date: May 4, 2023
    Applicants: CHIA TAI TIANQING PHARMACEUTICAL CO. ,LTD., LIANYUNGANG RUNZHONG PHARMACEUTICAL CO., LTD., SHOUYAO HOLDINGS (BEIJING) CO., LTD.
    Inventors: HONGMING LIANG, XIQUAN ZHANG, XUNQIANG WANG, DING YU, DONG WANG, Qi GE, ZHAO WANG, YINI WANG
  • Publication number: 20230119759
    Abstract: The present invention belongs to the field of medicinal chemistry, and relates to a pharmaceutical combination comprising a pyridino[1,2-a]pyrimidinone compound. In particular, the pharmaceutical combination comprises a compound of formula I or a pharmaceutically acceptable salt thereof and a fulvestrant or a pharmaceutically acceptable salt thereof.
    Type: Application
    Filed: March 10, 2021
    Publication date: April 20, 2023
    Inventors: Anqi YANG, Xiquan ZHANG, Xunqiang WANG, Ding YU, Fangfang GUO
  • Publication number: 20230079843
    Abstract: A quinoline derivative for treating rheumatoid arthritis and a use thereof in preparing a pharmaceutical composition for treating rheumatoid arthritis. In particular, a use of the quinoline derivative 1-[[[4-(4-Fluoro-2-methyl-1H-indol-5-yl)oxy-6-methoxyquinoline-7-yl]oxy]methyl]cyclopropanamine in treating rheumatoid arthritis.
    Type: Application
    Filed: January 19, 2021
    Publication date: March 16, 2023
    Applicant: CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD.
    Inventors: Xiquan ZHANG, Ling YANG, Hongjiang XU, Wei SONG, Xiaofang ZOU, Xianju WANG
  • Patent number: 11572372
    Abstract: Disclosed are a class of anti-HBV tetrahydroisoxazolo[4,3-c]pyridine compounds and pharmaceutically acceptable salts thereof or isomers thereof, the compounds being represented by the formula (I).
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: February 7, 2023
    Assignee: Medshine Discovery Inc.
    Inventors: Lifang Wu, Fei Sun, Jinhua Du, Charles Z. Ding, Shuhui Chen, Xiquan Zhang, Hongjiang Xu, Ling Yang
  • Publication number: 20230035184
    Abstract: The present application belongs to the field of medicine. In particular, the present application relates to a diarylthiohydantoin compound as an androgen receptor antagonist or a pharmaceutically acceptable salt thereof, a preparation method of the same, a pharmaceutical composition comprising the compound, and a use thereof in treating a cell proliferative disease mediated by androgen. The compound of the present application has good antagonistic effect on androgen receptor and exhibits excellent antitumor effect.
    Type: Application
    Filed: October 15, 2021
    Publication date: February 2, 2023
    Inventors: Chunli SHEN, Chengde WU, Shenglin CHEN, Shuhui CHEN, Xiquan ZHANG, Xin TIAN