Patents by Inventor Keliang Liu

Keliang Liu 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: 9750841
    Abstract: A medical adhesive with good biodegradable performance capable of undergoing crosslinking copolymerization, comprising a mono-alpha-cyanoacrylate and a bis-alpha-cyanoacrylic acid diol ester monomer molecule. The olefinic bonds in the mono-alpha-cyanoacrylate structure are polymerized in the presence of infinitesimal anions to form a solid 3D high polymer; the 3D high polymer is provided with degradation sites on the web-like backbone chain, with clear degradation path and absorbable degradation products. The medical adhesive can be used for wound adhesive, large area wound hemostasia, and visceral and soft tissue wound closure.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: September 5, 2017
    Assignees: INSTITUTE OF PHARMACOLOGY AND TOXICOLOGY ACADEMY OF MILITARY MEDICAL SCIENCES P.L.A., CHENGDU YIPING MEDICAL SCIENCE & TECHNOLOGY CO. LTD
    Inventors: Keliang Liu, Liang Xu, Qingsong Zhang, Dazhen Cai, Qingbin Meng
  • Patent number: 9464128
    Abstract: The present invention relates to site-specific PEGylated linear salmon calcitonin analogs, or pharmaceutically acceptable salts thereof, process for their preparation, pharmaceutical compositions comprising them, and their use for the preparation of a medicament for the treatment or prevention of diseases associated with bone metabolism, e.g., osteoporosis.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: October 11, 2016
    Assignee: INSTITUTE OF PHARMACOLOGY AND TOXICOLOGY ACADEMY OF MILITARY MEDICAL SCIENCES P.L.A.
    Inventors: Keliang Liu, Jiankun Qie, Zhixia Yang, Yuanjun Liang, Ying Wang, Zehui Gong, Huajin Dong
  • Patent number: 9260534
    Abstract: Disclosed are PEG-modified Exendin-4 analogs and uses thereof. In particular, disclosed are PEG-modified Exendin-4 analogs as shown in formula (I), i.e., PEG-M-X-(Ex-4), or pharmaceutically acceptable salts thereof, as well as Exendin-4 analogs as shown in formula (II), i.e., [Aap]Exendin-4, wherein the symbols are as defined in the specification. Further disclosed are methods for preparing PEG-modified Exendin-4 analogs, uses of PEG-modified Exendin-4 analogs, compositions comprising the same, as well as use of the Exendin-4 analogs in the preparation of the PEG-modified Exendin-4 analogs. In the PEG-modified Exendin-4 analogs, modification by polyethylene glycol occurs in a site-directed manner in the peptide chains of the Exendin-4 analogs. The PEG-modified Exendin-4 analogs can be used to prevent and/or treat diseases and/or symptoms related to decreased activity of GLP-1 receptors, such as type II diabetes.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: February 16, 2016
    Assignees: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences P.L.A. China, Chengdu Yiping Medical Science & Technology Co., Ltd.
    Inventors: Keliang Liu, Yuanjun Liang, Xiaoyu Xu, Sicheng Li
  • Publication number: 20140369952
    Abstract: A medical adhesive with good biodegradable performance capable of undergoing crosslinking copolymerization, comprising a mono-alpha-cyanoacrylate and a bis-alpha-cyanoacrylic acid diol ester monomer molecule. The olefinic bonds in the mono-alpha-cyanoacrylate structure are polymerized in the presence of infinitesimal anions to form a solid 3D high polymer; the 3D high polymer is provided with degradation sites on the web-like backbone chain, with clear degradation path and absorbable degradation products. The medical adhesive can be used for wound adhesive, large area wound hemostasia, and visceral and soft tissue wound closure.
    Type: Application
    Filed: October 31, 2012
    Publication date: December 18, 2014
    Inventors: Keliang Liu, Liang Xu, Qingsong Zhang, Dazhen Cai, Qingbin Meng
  • Publication number: 20130310310
    Abstract: Disclosed are PEG-modified Exendin-4 analogs and uses thereof. In particular, disclosed are PEG-modified Exendin-4 analogs as shown in formula (I), i.e., PEG-M-X-(Ex-4), or pharmaceutically acceptable salts thereof, as well as Exendin-4 analogs as shown in formula (II), i.e., [Aap]Exendin-4, wherein the symbols are as defined in the specification. Further disclosed are methods for preparing PEG-modified Exendin-4 analogs, uses of PEG-modified Exendin-4 analogs, compositions comprising the same, as well as use of the Exendin-4 analogs in the preparation of the PEG-modified Exendin-4 analogs. In the PEG-modified Exendin-4 analogs, modification by polyethylene glycol occurs in a site-directed manner in the peptide chains of the Exendin-4 analogs. The PEG-modified Exendin-4 analogs can be used to prevent and/or treat diseases and/or symptoms related to decreased activity of GLP-1 receptors, such as type II diabetes.
    Type: Application
    Filed: August 11, 2011
    Publication date: November 21, 2013
    Applicants: Chengdu Yiping Medical Science & Technology Co., Ltd., Institute of Pharmacology and Toxicology Academy of Military Medical Sciences P.L.A. China
    Inventors: Keliang Liu, Yuanjun Liang, Xiaoyu Xu, Sicheng Li
  • Patent number: 8080522
    Abstract: Polyethylene glycol modifications of thymosin alpha 1 (T&agr; 1-PEGs), their preparation process, the medicine composition containing them, and their application in the medicine for preventing and treating diseases related with immune deficiency and hypoimmunity, including hepatitis B, hepatitis C, hepatoma, malignant melanoma, non-small cell lung cancer, SARS, and AIDS etc.
    Type: Grant
    Filed: November 11, 2006
    Date of Patent: December 20, 2011
    Assignee: Institute of Pharmacology and Toxicology Academy of Military Mecical Sciences, P.L.A., China
    Inventors: Keliang Liu, Jiankun Qie, Jinbo Ma, Jianquan Zheng, Sijian Dong, Wenxia Zhou, Chunhui Qi
  • Publication number: 20110306633
    Abstract: The present invention provides a selective M4 receptor antagonist, levorotatory demethylated phencynonate or its nontoxic pharmaceutically acceptable salt, a pharmaceutical composition comprising this compound, and a use thereof in the manufacture of a medicament for the treatment of motion dysfunction, such as, tremor, rigor and the like caused by Parkinson's disease (PD).
    Type: Application
    Filed: November 7, 2007
    Publication date: December 15, 2011
    Applicant: INSTITUTE OF PHARMACOLOGY AND TOXICOLOGY ACADEMY OF MILITARY MEDICAL SCIENCES P.L.A.CHINA
    Inventors: Bohua Zhong, Jianquan Zheng, Liyun Wang, He Liu, Lanfu Chen, Keliang Liu
  • Publication number: 20110091420
    Abstract: Disclosed are an injectable sustained-release pharmaceutical formulation and a process for preparing the same. In some embodiments, the formulation comprises an active ingredient in a therapeutically effective amount, an amphipathic molecule, an organic acid and/or a salt thereof which is hardly soluble in water, and an oily solvent. The injectable sustained-release pharmaceutical formulation provides a good sustained-release effect for various active ingredients, in particular peptides, proteins, nucleic acids and saccharides.
    Type: Application
    Filed: March 20, 2009
    Publication date: April 21, 2011
    Applicants: Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, People Liberation Ar, Chengdu Yiping Pharmaceutical Science Development Co., Ltd.
    Inventors: Keliang Liu, Dongqin Quan, Yuanjun Liang, Qingbin Meng, Chenhong Wang, Junlin He, Qiyan Jia, Sicheng Li
  • Publication number: 20100227815
    Abstract: The present invention relates to site-specific PEGylated linear salmon calcitonin analogues, or pharmaceutically acceptable salts thereof, process for their preparation, pharmaceutical compositions comprising them, and their use for the preparation of a medicament for the treatment or prevention of diseases associated with bone metabolism, e.g., osteoporosis.
    Type: Application
    Filed: June 4, 2008
    Publication date: September 9, 2010
    Applicant: Institute of Pharmacology and Toxicology Academy Of Military Medical Science
    Inventors: Keliang Liu, Jiankun Qie, Zhixia Yang, Yuanjun Liang, Ying Wang, Zehui Gong, Huajin Dong
  • Publication number: 20090221487
    Abstract: Polyethylene glycol modifications of thymosin alpha 1 (T&agr; 1-PEGs), their preparation process, the medicine composition containing them, and their application in the medicine for preventing and treating diseases related with immune deficiency and hypoimmunity, including hepatitis B, hepatitis C, hepatoma, malignant melanoma, non-small cell lung cancer, SARS, and AIDS etc.
    Type: Application
    Filed: November 11, 2006
    Publication date: September 3, 2009
    Applicant: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences P.L.A. China
    Inventors: Keliang Liu, Jiankun Qie, Jinbo Ma, Jianquan Zheng, Sijian Dong, Sijian Dong, Wenxia Zhou, Chunhui Qi
  • Patent number: 6953780
    Abstract: The instant invention relates to some tripeptide derivatives having activity against endothelin a process for preparing them, pharmaceutical composition containing the same and their use in prevention or treatment of some diseases associated with endothelin.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: October 11, 2005
    Assignee: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences, P.L.A.
    Inventors: Keliang Liu, Wensheng Yu, Yuanjun Liang, Hai Wang, Yufen Zhao, Zhenkai Ding
  • Publication number: 20040038906
    Abstract: The instant invention relates to some tripeptide derivatives having activity against endothelin a process for preparing them, pharmaceutical composition containing the same and their use in prevention or treatment of some diseases associated with endothelin.
    Type: Application
    Filed: May 29, 2003
    Publication date: February 26, 2004
    Inventors: Keliang Liu, Wensheng Yu, Yuanjun Liang, Hai Wang, Yufen Zhao, Zhenkai Ding