Patents by Inventor Sarvajit Chakravarty

Sarvajit Chakravarty 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: 20090270412
    Abstract: This disclosure relates to new heterocyclic compounds that may be used to modulate a histamine receptor in an individual. Pyrido[3,4-b]indoles are described, as are pharmaceutical compositions comprising the compounds and methods of using the compounds in a variety of therapeutic applications, including the treatment of a cognitive disorder, psychotic disorder, neurotransmitter-mediated disorder and/or a neuronal disorder.
    Type: Application
    Filed: March 24, 2009
    Publication date: October 29, 2009
    Inventors: David T. HUNG, Andrew Asher Protter, Sarvajit Chakravarty, Rajendra P. Jain, Sundeep Dugar
  • Publication number: 20090239854
    Abstract: This disclosure relates to new tetracyclic compounds that may be used to modulate a histamine receptor in an individual. The compounds in one embodiment are tetracyclic [4,3-b]indoles. Pharmaceutical compositions comprising the compounds are also provided, as are methods of using the compounds in a variety of therapeutic applications, including the treatment of a cognitive disorder, psychotic disorder, neurotransmitter-mediated disorder and/or a neuronal disorder.
    Type: Application
    Filed: October 27, 2008
    Publication date: September 24, 2009
    Inventors: David T. HUNG, Andrew A. PROTTER, Rajendra P. JAIN, Sundeep DUGAR, Sarvajit CHAKRAVARTY, Sergey O. BACHURIN, Anatoly K. USTINOV, Bogdan K. BEZNOSKO, Elena F. SHEVTSOVA, Vladimir V. GRIGORIEV, Nadezhda Sergeevna Beznosko
  • Patent number: 7488744
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds comprising a phenyl or thienyl coupled through a piperidine or piperazine nucleus to an indole residue wherein the indole residue mandatorily has a substituent on the ring nitrogen which is an amino or substituted amino group.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: February 10, 2009
    Assignee: Scios, Inc.
    Inventors: Sarvajit Chakravarty, Sundeep Dugar, Qing Lu, Gregory R. Luedtke, Babu J. Mavunkel, John J. Perumattam, Richard Tester
  • Publication number: 20080182863
    Abstract: Certain appropriately substituted fused bicyclic pyrimidine compounds having an amide-substituted pyridylamine group at C-4 of the pyrimidine ring are useful in the treatment of conditions associated with HCV.
    Type: Application
    Filed: March 27, 2006
    Publication date: July 31, 2008
    Inventors: Kenneth Alan Simmen, Dominique Louis Nestor Ghislain Surleraux, Tse-I Lin, Oliver Lenz, Pierre Jean-Marie Bernard Raboisson, Sarvajit Chakravarty, Barry Patrick Hart
  • Patent number: 7345045
    Abstract: The invention is directed to methods to inhibit TGF-? and/or p38-? kinase using compounds of the formula or the pharmaceutically acceptable salts thereof wherein R3 is a noninterfering substituent; each Z is CR2 or N, wherein no more than two Z positions in ring A are N, and wherein two adjacent Z positions in ring A cannot be N; each R2 is independently a noninterfering substituent; L is a linker; n is 0 or 1; and Ar? is the residue of a cyclic aliphatic, cyclic heteroaliphatic, aromatic or heteroaromatic moiety optionally substituted with 1-3 noninterfering substituents.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: March 18, 2008
    Assignee: Scios, Inc.
    Inventors: Sarvajit Chakravarty, Sundeep Dugar, John J. Perumattam, George F. Schreiner, David Y. Liu, John A. Lewicki
  • Publication number: 20070293500
    Abstract: Quinazoline derivatives and their pharmaceutically acceptable salts are inhibitors of TGF? activity and are used to treat conditions characterized by enhanced TGF? activity.
    Type: Application
    Filed: June 19, 2007
    Publication date: December 20, 2007
    Inventors: Sundeep DUGAR, Sarvajit Chakravarty, Alison Murphy, Glenn McEnroe, Aurelia Conte, John Perumattam
  • Patent number: 7304048
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds containing an aromatic system coupled through a 7-membered heterocycle to an indole-type system.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: December 4, 2007
    Assignee: Scios, Inc.
    Inventors: Babu J. Mavunkel, Sarvajit Chakravarty, John J. Perumattam, Sundeep Dugar, Qing Lu, Xi Liang
  • Publication number: 20070232617
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds comprising a phenyl or thienyl coupled through a piperidine or piperazine nucleus to an indole residue wherein the indole residue mandatorily has a substituent on the ring nitrogen which is an amino or substituted amino group.
    Type: Application
    Filed: May 22, 2007
    Publication date: October 4, 2007
    Applicant: Scios, Inc.
    Inventors: Sarvajit Chakravarty, Sundeep Dugar, Qing Lu, Gregory Luedtke, Babu Mavunkel, John Perumattam, Richard Tester
  • Publication number: 20070161649
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds of the formula and the pharmaceutically acceptable salts thereof, or a pharmaceutical composition thereof, wherein represents a single or double bond; one Z2 is CA or CR8A and the other is CR1, CR12, NR6 or N wherein each R1, R6 and R8 is independently hydrogen or noninterfering substituent; A is —Wi—COXjY wherein Y is COR2 or an isostere thereof and R2 is hydrogen or a noninterfering substituent, each of W and X is a spacer of 2-6 ?, and each of i and j is independently 0 or 1; Z3 is NR7 or O; each R3 is independently a noninterfering substituent; n is 0-3; each of L1 and L2 is a linker; each R4 is independently a noninterfering substituent; m is 0-4; Z1 is CR5 or N wherein R5 is hydrogen or a noninterfering substituent; each of 1 and k is an integer from 0-2 wherein the sum of 1 and k is 0-3; Ar is an aryl group substituted with 0-5 noninterfering substituents, wherein two noninterfering substituents can form a fused
    Type: Application
    Filed: March 21, 2007
    Publication date: July 12, 2007
    Inventors: Babu Mavunkel, Sarvajit Chakravarty, John Perumattam, Sundeep Dugar, Qing Lu, Xi Liang
  • Patent number: 7238712
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds of the formula and the pharmaceutically acceptable salts thereof, or a pharmaceutical composition thereof, wherein represents a single or double bond; one Z2 is CA or CR8A and the other is CR1, CR12, NR6 or N wherein each R1, R6 and R8 is independently hydrogen or noninterfering substituent; A is —Wi—COXjY wherein Y is COR2 or an isostere thereof and R2 is hydrogen or a noninterfering substituent, each of W and X is a spacer of 2–6 ?, and each of i and j is independently 0 or 1; Z3 is NR7 or O; each R3 is independently a noninterfering substituent; n is 0–3; each of L1 and L2 is a linker; each R4 is independently a noninterfering substituent; m is 0–4; Z1 is CR5 or N wherein R5 is hydrogen or a noninterfering substituent; each of l and k is an integer from 0–2 wherein the sum of l and k is 0–3; Ar is an aryl group substituted with 0–5 noninterfering substituents, wherein two noninterfering substituents can form a fused ring; a
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: July 3, 2007
    Assignee: Scios, Inc.
    Inventors: Babu J. Mavunkel, Sarvajit Chakravarty, John J. Perumattam, Sundeep Dugar, Qing Lu, Xi Liang
  • Patent number: 7232824
    Abstract: Quinazoline derivatives have the formula: or the pharmaceutically acceptable salts thereof; wherein each of Z5, Z6, Z7 and Z8 is N or CH and wherein one or two Z5, Z6, Z7 and Z8 are N and wherein two adjacent Z positions cannot be N; wherein m and n are each independently 0–3; wherein R1 is independently OH, SH, NH2, OR, SR, NHR, halo or R-halide; wherein two adjacent R1 groups may be joined to form an aliphatic hetero cycle ring of 5–6 members; wherein R2 is independently R, halo, R-halide, OR-halide, NH2, CONH2 or CONHR; wherein R is optionally substituted C1–C12 alkyl, C1–C12 alkenyl, C1–C12 alkynyl, or aryl C1–C12 alkyl, containing 0–4 heteroatoms in place of a carbon in the carbon backbone, where the optional substituents are ?O, ?N, or OH; and wherein R3 is H or CH3. Such compounds are useful in pharmaceutical compositions and methods of treating conditions characterized by enhanced TGF? activity.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: June 19, 2007
    Assignee: Scios, Inc.
    Inventors: Sundeep Dugar, Sarvajit Chakravarty, Alison Murphy, Glenn McEnroe, Aurelia Conte, John J. Perumattam
  • Patent number: 7223766
    Abstract: Compounds in which a pyrimidine nucleus is bridged at the 5 and 6 position and are further substituted at positions 2 and 4 with substituents comprising aromatic moieties are useful in treating subjects with rheumatoid arthritis ameliorated by inhibition of TGF? activity.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: May 29, 2007
    Assignee: Scios, Inc.
    Inventors: Sundeep Dugar, Sarvajit Chakravarty, Aurelia Conte, Jonathan Axon, Glenn McEnroe, Alison Murphy
  • Patent number: 7220763
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds comprising a phenyl or thienyl coupled through a piperidine or piperazine nucleus to an indole residue wherein the indole residue mandatorily has a substituent on the ring nitrogen which is an amino or substituted amino group.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: May 22, 2007
    Assignee: Scios, Inc.
    Inventors: Sarvajit Chakravarty, Sundeep Dugar, Qing Lu, Gregory R. Luedtke, Babu J. Mavunkel, John J. Perumattam, Richland W. Tester
  • Publication number: 20070066632
    Abstract: Certain appropriately substituted fused bicyclic pyrimidine compounds having an amide-substituted pyridylamine group at C-4 of the pyrimidine ring are useful in the treatment of conditions associated with excessive TGF? activity and certain viral disorders.
    Type: Application
    Filed: March 27, 2006
    Publication date: March 22, 2007
    Applicant: Scios, Inc.
    Inventors: Barry Hart, Sarvajit Chakravarty, Jonathan Axon, Alison Murphy, Glenn McEnroe
  • Patent number: 7189726
    Abstract: The invention is directed to methods to inhibit p38-? kinase using compounds which contain an aromatic residue coupled to an benzofuran moiety through a piperidine.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: March 13, 2007
    Assignee: Scios, Inc.
    Inventors: Babu J. Mavunkel, Sarvajit Chakravarty, John J. Perumattam, Sundeep Dugar, Qing Lu, Xi Liang
  • Publication number: 20060281763
    Abstract: Certain appropriately substituted forms of pyrimidine having a pyridylamine group at C-4 of the pyrimidine and an amide group on the pyridine ring are useful in the treatment of conditions associated with excessive TGF? activity.
    Type: Application
    Filed: March 27, 2006
    Publication date: December 14, 2006
    Inventors: Jonathan Axon, Sarvajit Chakravarty, Barry Hart, Glenn McEnroe, Alison Murphy, Karen Pontius, Peijue Sheng, Xiaojing Wang, Shanthi Yellapregada
  • Patent number: 7119199
    Abstract: The present invention is directed to a method for producing a pyridopyrimidone of the formula wherein X is N or CH and R is an aryl, heteroaryl or alkyl group, said method comprising the step of reacting an acid derivative of the formula: wherein X is N or CH; Y is an appropriate leaving group; Z is a halogen, OR1, NHR1, or SR1; and R1 is a lower alkyl; and the amidine derivative is wherein R is an aryl, heteroaryl or alkyl group.
    Type: Grant
    Filed: December 31, 2004
    Date of Patent: October 10, 2006
    Assignee: Scios INC
    Inventors: Sarvajit Chakravarty, Sundeep Dugar, Richland Tester, Aurelia Conte
  • 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: 20050220784
    Abstract: The invention is directed to methods to inhibit TGF-? and/or p38-? kinase using compounds of the formula or the pharmaceutically acceptable salts thereof wherein R3 is a noninterfering substituent; each Z is CR2 or N, wherein no more than two Z positions in ring A are N, and wherein two adjacent Z positions in ring A cannot be N; each R2 is independently a noninterfering substituent; L is a linker; n is 0 or 1; and Ar? is the residue of a cyclic aliphatic, cyclic heteroaliphatic, aromatic or heteroaromatic moiety optionally substituted with 1-3 noninterfering substituents.
    Type: Application
    Filed: May 23, 2005
    Publication date: October 6, 2005
    Applicant: Scios, Inc.
    Inventors: Sarvajit Chakravarty, Sundeep Dugar, John Perumattam, George Schreiner, David Liu, John Lewicki
  • Publication number: 20050176957
    Abstract: The present invention is directed to a process for making 2-substituted pyridopyrimidones. In particular, 2-substituted pyridopyrimidones are made through the single step reaction of suitable acid derivatives with desired derivatives of amidines.
    Type: Application
    Filed: December 31, 2004
    Publication date: August 11, 2005
    Inventors: Sarvajit Chakravarty, Sundeep Dugar, Richland Tester, Aurelia Conte