Patents by Inventor Chang Xu

Chang Xu 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: 20030027831
    Abstract: A series of aryl piperazine compounds of the formula: 1
    Type: Application
    Filed: December 18, 2001
    Publication date: February 6, 2003
    Inventor: Yao-Chang Xu
  • Patent number: 6514976
    Abstract: Described herein is a compound of the formula wherein Ar′ is a mono or bicyclic aromatic or heteroaromatic radical substituted with one to three substituents selected from the group consisting of hydrogen, (C1-C6)alkyl, (C1-C6)alkoxy, (C1-C6)alkylthio, (C2-C6)alkenyl, (C2-C6)alkynyl, (C1-C6)alkylhalo, (C3-C8)cycloalkyl, (C3-C8)cycloalkenyl or halo; R1 is hydrogen, (C1-C6)alkyl, (C1-C6)alkoxy, (C1-C6)alkylthio; R2 is phenyl, naphthyl or (C3-C12)cycloalkyl substituted with one or two substituents selected from the group consisting of hydrogen (C1-C6)alkyl, (C1-C6)alkoxy, (C1-C6)alkylthio, (C2-C6)alkenyl, (C2-C6)alkynyl, (C1-C6)alkylhalo, (C3-C8)cycloalkyl, (C3-C8)cycloalkenyl or halo; R3 is selected from the group consisting of hydrogen, (C1-C6)alkyl, (C1-C6)alkoxy, (C1-C6)alkylthio, (C2-C6)alkenyl, (C2-C6)alkynyl, (C1-C6)alkylhalo, (C3-C8)cycloalkyl, (C3-C8)cycloalkenyl or halo; X is —(C═O)—; or a pharmaceutically acceptable salt racemate, optical isomer or solvat
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: February 4, 2003
    Assignee: Eli Lilly and Company
    Inventors: Daniel Timothy Kohlman, Yao-Chang Xu
  • Publication number: 20030008879
    Abstract: A series of aryl piperazine compounds are effective pharmaceuticals for the treatment of conditions related to or affected by the serotonin 1A receptor; the compounds are particularly effective antagonists at that receptor, and are particularly useful for alleviating the symptoms of nicotine and tobacco withdrawal.
    Type: Application
    Filed: April 30, 2002
    Publication date: January 9, 2003
    Inventors: Daniel Timothy Kohlman, Yao-Chang Xu
  • Publication number: 20020193590
    Abstract: The present invention provides compounds of formula I and a method of inhibiting the reuptake of serotonin, antagonizing the 5-HT1A receptor and antagonizing the 5-HT2A receptor which comprises administering to a subject in need of such treatment an effective amount of a compound of formula I.
    Type: Application
    Filed: May 8, 2002
    Publication date: December 19, 2002
    Inventors: Kenneth Lee Hauser, Larry Wayne Hertel, Yao-Chang Xu
  • Publication number: 20020169170
    Abstract: A method for potentiating the action of a serotonin reuptake inhibitor in increasing the availability of serotonin, norepinephrin and dopamine in the brain, comprising administering to a patient in need of such treatment a serotonin reuptake inhibitor in combination with an effective amount of a compound of the formula 1
    Type: Application
    Filed: December 18, 2001
    Publication date: November 14, 2002
    Inventors: Alexander Glenn Godfrey, Daniel Timothy Kohlman, John Cunningham O' Toole, Yao-Chang Xu, Tony Yantao Zhang
  • Patent number: 6465453
    Abstract: The present invention provides compounds of formula I and a method of inhibiting the reuptake of serotonin, antagonizing the 5-HT1A receptor and antagonizing the 5-HT2A receptor which comprises administering to a subject in need of such treatment an effective amount of a compound of formula I.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: October 15, 2002
    Assignee: Eli Lilly and Company
    Inventors: Kenneth Lee Hauser, Larry Wayne Hertel, Yao-Chang Xu
  • Patent number: 6436964
    Abstract: The present invention provides the compounds of the following formula: Wherein the variables are as defined in the specification and a method for inhibiting the reuptake of seretonin, antagonizing the 5-HT1A receptor and antagonizing the 5-HT2A receptor which comprises administering to a subject in need of such treatment an effective amount of the compound of above formula.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: August 20, 2002
    Assignee: Eli Lilly and Company
    Inventors: Larry Wayne Hertel, Daniel Timothy Kohlman, Sidney Xi Liang, David Taiwai Wong, Yao-Chang Xu
  • Patent number: 6412079
    Abstract: A computer system includes a plurality of interdependent processors for operating a common set of applications. Each interdependent processor executes an independent operating system image without sharing file system state information. Each interdependent processor has a network access card with a first network connection and a second network connection. The computer system includes a first active backplane coupled to each first network connection of each processor; a second active backplane coupled to each second network connection of each processor, the second active backplane operating in lieu of the first active backplane in case of a fail-over; and one or more directors coupled to the first and second active backplanes, each of the one or more directors load-balancing requests directed at a plurality of servers.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: June 25, 2002
    Assignee: Openwave Systems Inc.
    Inventors: Paul Edmonds, Yi Zhang, Chang Xu, Priyen Doshi, Stephen Co, Michael P. Tel, Andy Chan
  • Patent number: 6400649
    Abstract: An improved transducer arrangement for low frequency sonar projectors that convert electric signals to mechanically generated acoustic signals. In one embodiment the arrangement has both a convex flextensional transducer and a concave flextensional transducer. An open side of the convex transducer is attached to an open side of the concave transducer by an intermediate bulkhead which closes each of the attached open sides. An end plate is attached to another open side of the convex transducer and another end plate is attached to another open side of the concave transducer such that the end plates close the attached open sides. In another embodiment, transducer assembly has a convex transducer having end plates and a concave transducer having end plates. Either one of the endplates of the concave transducer is attached to one of the endplates of the convex transducer, or an endplate of the concave transducer is also an endplate of the concave transducer.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: June 4, 2002
    Assignee: L3 Communications Corporation
    Inventors: Colin W. Skinner, Qi-Chang Xu
  • Publication number: 20020065312
    Abstract: A class of novel aminotetralins is disclosed useful as 5-HT1D&agr; agonists.
    Type: Application
    Filed: October 3, 2001
    Publication date: May 30, 2002
    Inventors: John M. Schaus, Clint D. Walker, Yao-Chang Xu
  • Patent number: 6397345
    Abstract: A computer system includes a plurality of interdependent processors. Each interdependent processor executes an independent operating system image without sharing file system state information, and each interdependent processor further has a network access card with a first network connection and a second network connection. The computer system has a first active backplane coupled to each first network connection of each processor; a second active backplane coupled to each second network connection of each processor, the second active backplane operating in lieu of the first active backplane in case of a fail-over; and one or more peripherals connected to each of the first and second active backplanes and responsive to data requests transmitted over the first and second active backplanes.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: May 28, 2002
    Assignee: Openwave Systems Inc.
    Inventors: Paul Edmonds, Yi Zhang, Chang Xu, Priyen Doshi, Stephen Co, Michael P. Tel, Andy Chan
  • Patent number: 6358958
    Abstract: A series of aryl piperazine compounds are effective pharmaceuticals for the treatment of conditions related to or affected by the serotonin 1A receptor; the compounds are particularly effective antagonists at that receptor, and are particularly useful for alleviating the symptoms of nicotine and tobacco withdrawal.
    Type: Grant
    Filed: January 3, 2001
    Date of Patent: March 19, 2002
    Assignee: Eli Lilly and Company
    Inventors: Daniel Timothy Kohlman, Yao-Chang Xu
  • Patent number: 6355674
    Abstract: A class of novel aminotetralins is disclosed useful as 5-HT1D&agr; agonists.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: March 12, 2002
    Assignee: Eli Lilly and Company
    Inventors: John M Schaus, Clint D Walker, Yao-Chang Xu
  • Patent number: 6353008
    Abstract: The present invention provides the compounds of the following formula (I): and a method for inhibiting the reuptake of seretonin, antagonizing the 5-HT1A receptor and antagonizing the 5-HT2A receptor which comprises administering to a subject in need of such treatment an effective amount of formula (I).
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: March 5, 2002
    Assignee: Eli Lilly and Company
    Inventors: Larry Wayne Hertel, Yao-Chang Xu
  • Patent number: 6342498
    Abstract: Anylpiperazines of formula (1) useful as serotonin reuptake inhibitors and 5-HT1D&agr; receptor antagonists are disclosed herein: wherein R1 and R2 are each independently hydrogen, halo, —(C1-C6)alkyl or —(C1-C6)alkoxy; R3 is hydrogen or —(C1-C6)alkyl; Y is —CO— or —CH2—; Z is —NH—, —N(COR)— or —CH2— where R is —(C1-C6)alkyl or —(C3-C8)cycloalkyl; represents a double or single bond; n and m are an each independently integer from 1 to 3, both inclusive; or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: January 29, 2002
    Assignee: Eli Lilly and Company
    Inventors: Clint Duane Walker, David Taiwai Wong, Yao-Chang Xu
  • Publication number: 20010022757
    Abstract: An improved transducer arrangement for low frequency sonar projectors that convert electric signals to mechanically generated acoustic signals. In one embodiment the arrangement has both a convex flextensional transducer and a concave flextensional transducer. An open side of the convex transducer is attached to an open side of the concave transducer by an intermediate bulkhead which closes each of the attached open sides. An end plate is attached to another open side of the convex transducer and another end plate is attached to another open side of the concave transducer such that the end plates close the attached open sides. In another embodiment, transducer assembly has a convex transducer having end plates and a concave transducer having end plates. Either one of the endplates of the concave transducer is attached to one of the endplates of the convex transducer, or an endplate of the concave transducer is also an endplate of the concave transducer.
    Type: Application
    Filed: April 24, 2001
    Publication date: September 20, 2001
    Inventors: Colin W. Skinner, Qi-Chang Xu
  • Patent number: 6278658
    Abstract: An improved transducer arrangement for low frequency sonar projectors that convert electric signals to mechanically generated acoustic signals. In one embodiment the arrangement has both a convex flextensional transducer and a concave flextensional transducer. An open side of the convex transducer is attached to an open side of the concave transducer by an intermediate bulkhead which closes each of the attached open sides. An end plate is attached to another open side of the convex transducer and another end plate is attached to another open side of the concave transducer such that the end plates close the attached open sides. In another embodiment, transducer assembly has a convex transducer having end plates and a concave transducer having end plates. Either one of the endplates of the concave transducer is attached to one of the endplates of the convex transducer, or an endplate of the concave transducer is also an endplate of the concave transducer.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: August 21, 2001
    Assignee: L3 Communications Corporation
    Inventors: Colin W. Skinner, Qi-Chang Xu
  • Publication number: 20010003749
    Abstract: A series of aryl piperazine compounds are effective pharmaceuticals for the treatment of conditions related to or affected by the serotonin 1A receptor; the compounds are particularly effective antagonists at that receptor, and are particularly useful for alleviating the symptoms of nicotine and tobacco withdrawal.
    Type: Application
    Filed: January 3, 2001
    Publication date: June 14, 2001
    Inventors: Alexander Glenn Godfrey, Daniel Timothy Kohlman, John Cunningham O'Toole, Yao-Chang Xu, Tony Yantao Zhang
  • Patent number: 6239135
    Abstract: A series of aryl piperazine compounds of the formula: or the pharmaceutically acceptable salts thereof, are effective pharmaceuticals for the treatment of conditions related to or affected by the serotonin 1A receptor; the compounds are particularly effective antagonists at that receptor, and are particularly useful for alleviating the symptoms of nicotine and tobacco withdrawal.
    Type: Grant
    Filed: December 9, 1998
    Date of Patent: May 29, 2001
    Assignee: Eli Lilly and Company
    Inventors: Daniel Timothy Kohlman, Yao-Chang Xu
  • Patent number: 6230190
    Abstract: A computer system has a plurality of processors, each processor executing an independent operating system image without sharing file system state information. The system includes an active backplane coupled to the plurality of processors; and one or more data storage devices coupled to the active backplane for satisfying data requests from the plurality of processors, each of the data storage devices being adapted to secure a file when one processor writes to the file and to release the file when the processor completes operation on the file.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: May 8, 2001
    Assignee: Openwave Systems Inc.
    Inventors: Paul Edmonds, Yi Zhang, Chang Xu, Priyen Doshi, Stephen Co, Michael P. Tel, Andy Chan