Patents by Inventor Tao Xin

Tao Xin 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: 20040132726
    Abstract: The present invention relates to new compounds of formula I, 1
    Type: Application
    Filed: August 8, 2003
    Publication date: July 8, 2004
    Applicant: AstraZeneca AB and NPS Pharmaceuticals, Inc.
    Inventors: Jalaj Arora, Louise Edwards, Methvin Isaac, Donald A. McLeod, Abdelmalik Slassi, Tomislav Stefanac, Thomas M. Stormann, David Wensbo, Tao Xin, Annika Kers, Johan Malmberg, Karin Oscarsson
  • Publication number: 20040106607
    Abstract: The present invention relates to new compounds of formula I, 1
    Type: Application
    Filed: August 8, 2003
    Publication date: June 3, 2004
    Applicant: AstraZeneca AB and NPS Pharmaceuticals, Inc.
    Inventors: Jalaj Arora, Louise Edwards, Methvin Isaac, Abdelmalik Slassi, Tomislav Stefanac, David Wensbo, Tao Xin
  • Patent number: 6716837
    Abstract: Described herein are compounds useful in the treatment of migraine, which have the general formula: wherein: W is a CH group or a N atom; Z is N or C—R4; B and D are selected independently from CH and N, with the proviso that at least one of B and D is CH and with the further proviso that one of B and D can represent N only when W and Z are both other than N; A is a group of Formula II, III or IV, such that group A contains at least 1 N atom; NR7 is either —NH— or —N═; is a single or double bond; X is a N atom, a CH group or a C(OH) group when is a single bond; or, when is a double bond, a C atom; Y is an NH, N-alkyl, N-benzyl or CH2 group; U and V each represent a N atom or a CH group, with the proviso that both cannot be N; a and b are, independently, 0 or 1; c is an integer from 0 to 3; d is an integer from 1 to 3; e is an integer from 1 to 2; f is an integer from 0 to 3; g is an integer from 3 to 6 and h is an integer from 2 to 3; such that the sum of c a
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: April 6, 2004
    Assignee: NPS Allelix Biopharmaceuticals, Inc.
    Inventors: Louise Edwards, Methvin Isaac, Shawn Maddaford, Abdelmalik Slassi, Tao Xin
  • Patent number: 6686374
    Abstract: Described herein are compounds with affinity for the 5-HT6 receptor, which have the general formula I: wherein: R represents a group of Formula II or Formula III; one of A, B D or E is a N atom, the remainder being CH groups; R1 is selected from the group consisting of SO2Ar, C(O)Ar, CH2Ar and Ar; R2, R3 and R4 are independently selected from the group consisting of H and alkyl; represents a single or double bond, with the proviso that there is only one double bond in the ring at a time; n is an integer of from 1-3; Z is selected from the group consisting of C, CH and N, provided that when is a double bond, Z is C and when is a single bond, Z is selected from CH and N; Ar is an optionally substituted aryl group; with the proviso that when R is a group of Formula II, R1 is SO2Ar.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: February 3, 2004
    Assignee: NPS Allelix Corp.
    Inventors: Louise Edwards, Abdelmalik Slassi, Ashok Tehim, Tao Xin
  • Patent number: 6635639
    Abstract: Described are compounds having formula I or II: wherein: X is N, and Ak represents a C1-3 alkylene chain; and a salt, solvate or prodrug thereof.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: October 21, 2003
    Assignee: NPS Allelix Corp.
    Inventors: Jalaj Arora, Louise Edwards, Methvin Issac, Anne O'Brien, Abdelmalik Slassi, Ashok Tehim, Tao Xin
  • Patent number: 6562809
    Abstract: Described herein are compounds selective for a 5-HT1D receptor, which have the general formula:
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: May 13, 2003
    Assignee: NPS Allelix Corp.
    Inventors: Abdelmalik Slassi, Tao Xin, Louise Edwards, Ashok Tehim
  • Publication number: 20020169322
    Abstract: Described are compounds having formula I or II: 1
    Type: Application
    Filed: February 13, 2002
    Publication date: November 14, 2002
    Applicant: NPS Allexlix Corp.
    Inventors: Jalaj Arora, Louise Edwards, Methvin Isaac, Anne O'Brien, Abdelmalik Slassi, Ashok Tehim, Tao Xin
  • Patent number: 6380242
    Abstract: The present invention is directed to compounds useful in the treatment of migraine which have the general formula (II).
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: April 30, 2002
    Assignee: NPS Allelix Corp.
    Inventors: Jalaj Arora, Louise Edwards, Methvin Isaac, Anne O'Brien, Abdelmalik Slassi, Ashok Tehim, Tao Xin
  • Publication number: 20010049441
    Abstract: Described herein are compounds with affinity for the 5-HT6 receptor, which have the general formula I: 1
    Type: Application
    Filed: December 22, 2000
    Publication date: December 6, 2001
    Applicant: Allelix Biopharmaceuticals, Inc.
    Inventors: Louise Edwards, Abdelmalik Slassi, Ashok Tehim, Tao Xin
  • Patent number: 6251893
    Abstract: Described herein are compounds with affinity for the 5-HT6 receptor, which have the general formula: wherein R1, R2, R3 and R4 are independently selected from the group consisting of H, halo, OH, C1-6alkyl, C1-6alkoxy, C2-6alkenyl, C2-6alkynyl, C3-7cycloalkyl and others; R5 is selected from the group consisting of SO2Ar, C(O)Ar, Ar and CH2Ar; R6 and R7 are independently selected from the group consisting of H, C1-6alkyl, optionally substituted phenyl and optionally substituted benzyl; ————— represents a single or double bond; n is selected from an integer of from 1-3; X is selected from the group consisting of CR17 and N; Z is selected from the group consisting of C, CH and N, provided that when ————— is a double bond, Z is C and when ————— is a single bond, Z is selected from CH and N; Ar is an optionally substituted aromatic group selected from the group consisting of phenyl, pyridyl, thienyl,
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: June 26, 2001
    Assignee: NPS Allelix Corp.
    Inventors: Shawn Maddaford, Tao Xin, Abdelmalik Slassi, Ashok Tehim, Qi Qiao
  • Patent number: 6191141
    Abstract: Described herein are compounds with affinity for the 5-HT6 receptor, which have the general formula I: wherein: R represents a group of Formula II or Formula III; one of A, B D or E is a N atom, the remainder being CH groups; R1 is selected from the group consisting of SO2Ar, C(O)Ar, CH2Ar and Ar; R2, R3 and R4 are independently selected from the group consisting of H and alkyl; ----- represents a single or double bond, with the proviso that there is only one double bond in the ring at a time; n is an integer of from 1-3; Z is selected from the group consisting of C, CH and N, provided that when ----- is a double bond, Z is C and when ----- is a single bond, Z is selected from CH and N; Ar is an optionally substituted aryl group; with the proviso that when R is a group of Formula II, R1 is SO2Ar. Also described is the use of these compounds as pharmaceuticals to treat indications where inhibition of the 5-HT6 receptor is implicated, such as schizophrenia.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: February 20, 2001
    Assignee: NPS Allelix Corp.
    Inventors: Louise Edwards, Abdelmalik Slassi, Ashok Tehim, Tao Xin
  • Patent number: 6133287
    Abstract: Described herein are compounds with affinity for the 5-HT.sub.6 receptor, which have the general formula: wherein:R.sup.1 is selected from the group consisting of H and C.sub.1-4 alkyl;R.sup.2 is selected from the group consisting of H, C.sub.1-4 alkyl and benzyl;-- -- -- represents a single or double bond;R.sup.3 is selected from the group consisting of COR.sup.5 and SO.sub.2 R.sup.5 ;R.sup.4a is selected from the group consisting of H, OH, halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy;R.sup.4b is selected from the group consisting of H, hydroxy, halo, C.sub.3-7 cycloalkyloxy, C.sub.1-4 alkoxy, C.sub.1-4 alkyl, benzyloxy, phenoxy, trifluoromethyl, trifluoromethoxy and vinyl;R.sup.4c is selected from the group consisting of H, OH, halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy;R.sub.4d is selected from the group consisting of H, OH, halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; andR.sup.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: October 17, 2000
    Assignee: Allelix Biopharmaceuticals Inc.
    Inventors: Abdelmalik Slassi, Louise Edwards, Anne O'Brien, Tao Xin, Ashok Tehim
  • Patent number: 6100291
    Abstract: Described herein are compounds with affinity for the 5-HT.sub.6 receptor, which have the general formula: ##STR1## wherein: R.sup.1 is selected from the group consisting of H and C.sub.1-4 alkyl;R.sup.2 is selected from the group consisting of H, C.sub.1-4 alkyl and benzyl;R.sup.3 is selected from the group consisting of COR.sup.5, SO.sub.2 R.sup.5, CONHC.sub.1-4 alkyl and C(S)SR.sup.6 ;R.sup.4a is selected from the group consisting of H, OH, halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy;R.sup.4b is selected from the group consisting of H, hydroxy, halo, C.sub.3-7 cycloalkyloxy, C.sub.1-4 alkoxy, C.sub.1-4 alkyl, benzyloxy, phenoxy, trifluoromethyl, trifluoromethoxy and vinyl;R.sup.4c is selected from the group consisting of H, OH, halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy;R.sup.4d is selected from the group consisting of H, OH, halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy;R.sup.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: August 8, 2000
    Assignee: Allelix Biopharmaceuticals Inc.
    Inventors: Abdelmalik Slassi, Louise Edwards, Anne O'Brien, Tao Xin, Ashok Tehim
  • Patent number: 5914401
    Abstract: Novel process for the preparation of quinolone carboxylic acid derivatives of general formula I, and intermediates thereof as illustrated in Scheme 1 wherein the key intermediate is a compound of formula IX.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: June 22, 1999
    Assignee: Apotex, Inc.
    Inventors: Ian Egle, Regis C.S.H. Leung-Toung, Bo Lei, Tim Fat Tam, Tao Xin, Khashayar Karimian
  • Patent number: D285429
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: September 2, 1986
    Assignee: Chrysler Corporation
    Inventors: William A. Dayton, John E. Crain, Robert N. Hubbach
  • Patent number: D285430
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: September 2, 1986
    Assignee: Chrysler Corporation
    Inventors: William A. Dayton, John E. Crain, Robert N. Hubbach