Patents by Inventor Xuefei Tan

Xuefei Tan 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: 8481579
    Abstract: Compounds are provided that act as potent antagonists of the CCR2 or CCR9 receptor. Animal testing demonstrates that these compounds are useful for treating inflammation, a hallmark disease for CCR2 and CCR9. The compounds are generally aryl sulfonamide derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR2-mediated diseases, CCR9-mediated diseases, as controls in assays for the identification of CCR2 antagonists and as controls in assays for the identification of CCR9 antagonists.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: July 9, 2013
    Assignee: Chemocentryx, Inc.
    Inventors: Trevor T. Charvat, Cheng Hu, Anita Melikian, Aaron Novack, Andrew M. K. Pennell, Sreenivas Punna, Edward J. Sullivan, Xuefei Tan, William D. Thomas, Solomon Ungashe, Yibin Zeng
  • Publication number: 20130079365
    Abstract: The invention provides novel compounds having the general formula (I) wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, A1, A2 A3 and n are as described herein, compositions including the compounds and methods of using the compounds. The compounds of the present invention are useful as inhibitors of aldosterone synthase. The compounds may be used, for example, in the treatment or prophylaxis of chronic kidney disease, congestive heart failure, hypertension, primary aldosteronism and Cushing syndrome.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 28, 2013
    Inventors: Johannes Aebi, Kurt Amrein, Serena Maria Fantasia, Benoit Hornsperger, Bernd Kuhn, Yongfu Liu, Hans P. Maerki, Alexander V. Mayweg, Peter Mohr, Michelangelo Scalone, Xuefei Tan, Mingwei Zhou
  • Publication number: 20130072679
    Abstract: The invention provides novel compounds having the general formula (I) wherein R1, R2, R3, R4, R5, R6, R7, A1, A2 and A3 are as described herein, compositions including the compounds and methods of using the compounds. These compounds are useful for therapy or prophylaxis in a mammal, and in particular as aldosterone synthase (CYP11B2 or CYP11B1) inhibitors for the treatment or prophylaxis of chronic kidney disease, congestive heart failure, hypertension, primary aldosteronism and Cushing syndrome.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 21, 2013
    Inventors: Johannes Aebi, Kurt Amrein, Benoit Hornsperger, Henner Knust, Bernd Kuhn, Yongfu Liu, Hans P. Maerki, Alexander V. Mayweg, Peter Mohr, Xuefei Tan, Mingwei Zhou
  • Publication number: 20120165303
    Abstract: Compounds are provided that act as potent antagonists of the CCR2 or CCR9 receptor. Animal testing demonstrates that these compounds are useful for treating inflammation, a hallmark disease for CCR2 and CCR9. The compounds are generally aryl sulfonamide derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR2-mediated diseases, CCR9-mediated diseases, as controls in assays for the identification of CCR2 antagonists and as controls in assays for the identification of CCR9 antagonists.
    Type: Application
    Filed: March 2, 2012
    Publication date: June 28, 2012
    Applicant: ChemoCentryx, Inc.
    Inventors: Trevor T. Charvat, Cheng Hu, Anita Melikian, Aaron Novack, Andrew M.K. Pennell, Sreenivas Punna, Edward J. Sullivan, Xuefei Tan, William D. Thomas, Solomon Ungashe, Yibin Zeng
  • Patent number: 8189463
    Abstract: A method for realizing backpressure of masses of ports and a device realizing the method are disclosed. The method for realizing backpressure of masses of ports includes: detecting whether user data transmitted to a channelized physical port reaches a backpressure threshold, generating an idle frame or a series of idle frames when the backpressure threshold is reached; combining the idle frame with the user data which needs to be transmitted to the channelized physical port reaching the backpressure threshold, and transmitting the combined data; discarding the idle frame before the combined data enters the channelized physical port. The idle frame is employed in the present invention to realize the backpressure. The idle frame occupies some of the transmission bandwidth and reduces the bandwidth of user data, while the idle frame does not enter the physical port. Therefore, the aim of backpressure is achieved. The bandwidth of idle frame can be pre-configured according to the requirements.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: May 29, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wenhua Du, Jacky Li, Xuefei Tan, Qiangsheng Ruan, Weijiang Hu, Songhai Chen, Xiumei Cui
  • Patent number: 8153818
    Abstract: Compounds are provided that act as potent antagonists of the CCR2 or CCR9 receptor. Animal testing demonstrates that these compounds are useful for treating inflammation, a hallmark disease for CCR2 and CCR9. The compounds are generally aryl sulfonamide derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR2-mediated diseases, CCR9-mediated diseases, as controls in assays for the identification of CCR2 antagonists and as controls in assays for the identification of CCR9 antagonists.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: April 10, 2012
    Assignee: ChemoCentryx, Inc.
    Inventors: Trevor T. Charvat, Cheng Hu, Anita Melikian, Aaron Novack, Andrew M. K. Pennell, Sreenivas Punna, Edward J. Sullivan, Xuefei Tan, William D. Thomas, Solomon Ungashe, Yibin Zeng
  • Patent number: 7940678
    Abstract: A method for failure detection on a bidirectional forwarding link mainly includes: sending, by one side of a BFD session, a BFD packet to the opposite side of the BFD session, and detecting a BFD packet sent by the opposite side, and starting, by the local side of the BFD session, BFD session detection when receiving a first BFD packet sent from the opposite side. By the method of the invention, it can be avoided that a router misinforms that failure occurs on a BFD session link due to difference of delays needed to deliver a BFD session parameter from a negotiation module of the router to a detection module.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: May 10, 2011
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Xuefei Tan
  • Publication number: 20100190762
    Abstract: Compounds are provided that act as potent antagonists of the CCR2 or CCR9 receptor. Animal testing demonstrates that these compounds are useful for treating inflammation, a hallmark disease for CCR2 and CCR9. The compounds are generally aryl sulfonamide derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR2-mediated diseases, CCR9-mediated diseases, as controls in assays for the identification of CCR2 antagonists and as controls in assays for the identification of CCR9 antagonists.
    Type: Application
    Filed: April 2, 2010
    Publication date: July 29, 2010
    Applicant: CHEMOCENTRYX, INC.
    Inventors: Trevor T. Charvat, Cheng Hu, Anita Melikian, Aaron Novack, Andrew M.K. Pennell, Sreenivas Punna, Edward J. Sullivan, Xuefei Tan, William D. Thomas, Solomon Ungashe, Yibin Zeng
  • Publication number: 20100149992
    Abstract: A method for failure detection on a bidirectional forwarding link mainly includes: sending, by one side of a BFD session, a BFD packet to the opposite side of the BFD session, and detecting a BFD packet sent by the opposite side, and starting, by the local side of the BFD session, BFD session detection when receiving a first BFD packet sent from the opposite side. By the method of the invention, it can be avoided that a router misinforms that failure occurs on a BFD session link due to difference of delays needed to deliver a BFD session parameter from a negotiation module of the router to a detection module.
    Type: Application
    Filed: May 30, 2006
    Publication date: June 17, 2010
    Inventor: Xuefei Tan
  • Patent number: 7718683
    Abstract: Compounds are provided that act as potent antagonists of the CCR2 or CCR9 receptor. Animal testing demonstrates that these compounds are useful for treating inflammation, a hallmark disease for CCR2 and CCR9. The compounds are generally aryl sulfonamide derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR2-mediated diseases, CCR9-mediated diseases, as controls in assays for the identification of CCR2 antagonists and as controls in assays for the identification of CCR9 antagonists.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: May 18, 2010
    Assignee: ChemoCentryx, Inc.
    Inventors: Trevor T. Charvat, Cheng Hu, Anita Melikian, Aaron Novack, Andrew M. K. Pennell, Sreenivas Punna, Edward J. Sullivan, Xuefei Tan, William D. Thomas, Solomon Ungashe, Yibin Zeng
  • Publication number: 20090279435
    Abstract: A method for realizing backpressure of masses of ports and a device realizing the method are disclosed. The method for realizing backpressure of masses of ports includes: detecting whether user data transmitted to a channelized physical port reaches a backpressure threshold, generating an idle frame or a series of idle frames when the backpressure threshold is reached; combining the idle frame with the user data which needs to be transmitted to the channelized physical port reaching the backpressure threshold, and transmitting the combined data; discarding the idle frame before the combined data enters the channelized physical port. The idle frame is employed in the present invention to realize the backpressure. The idle frame occupies some of the transmission bandwidth and reduces the bandwidth of user data, while the idle frame does not enter the physical port. Therefore, the aim of backpressure is achieved. The bandwidth of idle frame can be pre-configured according to the requirements.
    Type: Application
    Filed: July 17, 2009
    Publication date: November 12, 2009
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Wenhua Du, Jacky Li, Xuefei Tan, Qiangsheng Ruan, Weijiang Hu, Songhai Chen, Xiumei Cui
  • Publication number: 20080039465
    Abstract: Compounds are provided that act as potent antagonists of the CCR2 or CCR9 receptor. Animal testing demonstrates that these compounds are useful for treating inflammation, a hallmark disease for CCR2 and CCR9. The compounds are generally aryl sulfonamide derivatives and are useful in pharmaceutical compositions, methods for the treatment of CCR2-mediated diseases, CCR9-mediated diseases, as controls in assays for the identification of CCR2 antagonists and as controls in assays for the identification of CCR9 antagonists.
    Type: Application
    Filed: July 10, 2007
    Publication date: February 14, 2008
    Inventors: Trevor Charvat, Cheng Hu, Anita Melikian, Aaron Novack, Andrew Pennell, Sreenivas Punna, Edward Sullivan, Xuefei Tan, William Thomas, Solomon Ungashe, Yibin Zeng
  • Patent number: 7291613
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds comprising saturated heterocycles coupled to a fused ring system.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: November 6, 2007
    Assignee: Scios, Inc.
    Inventors: Sundeep Dugar, John Perumattam, Gregory Luedtke, Xuefei Tan, Qing Lu
  • Publication number: 20070185112
    Abstract: Piperazine compounds and methods for treating conditions mediated by p38-? kinase are disclosed.
    Type: Application
    Filed: March 19, 2007
    Publication date: August 9, 2007
    Inventors: Babu Mavunkel, Sundeep Dugar, Gregory Luedtke, Glenn McEnroe, Xuefei Tan
  • Patent number: 7214679
    Abstract: Compounds of the formula: wherein the substituents are as defined herein are useful for treating conditions mediated by p38 kinase.
    Type: Grant
    Filed: January 13, 2004
    Date of Patent: May 8, 2007
    Assignee: Scios, Inc.
    Inventors: Babu J. Mavunkel, Sundeep Dugar, Gregory R. Luedtke, Xuefei Tan, Glen McEnroe
  • Publication number: 20060199821
    Abstract: The invention is directed to compounds and methods to inhibit p38 kinase wherein the compounds are a pyrimidine or pyridine coupled to two mandatory substituents.
    Type: Application
    Filed: August 3, 2005
    Publication date: September 7, 2006
    Applicant: Scios, Inc.
    Inventors: Richard Tester, Xuefei Tan, Kurt Schinzel, Imad Nashashibi, Gregory Luedtke, Weiling Liang, Joon Jung, R. Goehring, Sundeep Dugar, Steven Do
  • Publication number: 20050288299
    Abstract: The invention is directed to methods to inhibit p38 kinase, preferably p38-? using compounds which are azaindoles wherein the azaindoles are coupled through a piperidine or piperazine type linker to another cyclic moiety.
    Type: Application
    Filed: April 15, 2005
    Publication date: December 29, 2005
    Inventors: Babu Mavunkel, John Perumattam, Qing Lu, Sundeep Dugar, Bindu Goyal, Dan Wang, Sarvajit Chakravarty, Gregory Luedtke, Imad Nashashibi, Richland Tester, Xuefei Tan
  • Publication number: 20050171183
    Abstract: Compounds that inhibit p38-? kinase are those wherein a bicyclic aromatic system is coupled through a saturated ring to an aryl group.
    Type: Application
    Filed: April 4, 2005
    Publication date: August 4, 2005
    Applicant: SCIOS, INC.
    Inventors: Gregory Luedtke, Richland Tester, Sundeep Dugar, Qing Lu, John Perumattam, Xuefei Tan
  • Publication number: 20050130965
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds comprising saturated heterocycles coupled to a fused ring system.
    Type: Application
    Filed: November 18, 2004
    Publication date: June 16, 2005
    Inventors: Sundeep Dugar, John Perumattam, Gregory Luedtke, Xuefei Tan, Qing Lu
  • Patent number: 6890938
    Abstract: Compound with an indole linked through an aliphatic ring system to an aromatic moiety are useful in treating conditions associated with enhanced P38? kinase activity.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: May 10, 2005
    Assignee: Scios, Inc.
    Inventors: Gregory Luedtke, Richland Tester, Sundeep Dugar, Qing Lu, John Perumattam, Xuefei Tan