Patents by Inventor Tamara Ladduwahetty

Tamara Ladduwahetty 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: 8481544
    Abstract: Compounds of formula (I) have antibacterial activity: wherein: m is 0 or 1; Q is hydrogen or cyclopropyl; Alk is an optionally substituted, divalent C1-C6 alkylene, alkenylene or alkynylene radical which may contain an ether (—O—), thioether (—S—) or amino (—NR)— link, wherein R is hydrogen, —CN or C1-C3 alkyl; X is —C(?O)NR6—, —S(O)NR6—, —C(?O)O— or —S(?O)O— wherein R6 is hydrogen, optionally substituted C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, -Cyc, or —(C1-C3 alkyl)-Cyc wherein Cyc is optionally substituted monocyclic carbocyclic or heterocyclic having 3-7 ring atoms; Z is N; R2 and R3 are as defined in the description.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: July 9, 2013
    Assignee: Biota Europe Limited
    Inventors: David John Haydon, Lloyd George Czaplewski, Nicholas John Palmer, Dale Robert Mitchell, John Frederick Atherall, Christopher Richard Steele, Tamara Ladduwahetty
  • Patent number: 8389516
    Abstract: Compounds of formula (I) have antibacterial activity: wherein: m is 0 or 1; Q is hydrogen or cyclopropyl; Alk is an optionally substituted, divalent C1-C6 alkylene, alkenylene or alkynylene radical which may contain an ether (—O—), thioether (—S—) or amino (—NR)— link, wherein R is hydrogen, —CN or C1-C3 alkyl; X is —C(?O)NR6—, —S(O)NR6—, —C(?O)O— or —S(?O)O— wherein R6 is hydrogen, optionally substituted C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, -Cyc, or —(C1-C3 alkyl)-Cyc wherein Cyc is optionally substituted monocyclic carbocyclic or heterocyclic having 3-7 ring atoms; Z is N or CH, or CF; R2 and R3 are as defined in the description.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: March 5, 2013
    Assignee: Biota Europe Limited
    Inventors: David John Haydon, Lloyd George Czaplewski, Nicholas John Palmer, Dale Robert Mitchell, John Frederick Atherall, Christopher Richard Steele, Tamara Ladduwahetty
  • Publication number: 20120004221
    Abstract: Compounds of formula (I) have antibacterial activity: wherein: m is 0 or 1; Q is hydrogen or cyclopropyl; Alk is an optionally substituted, divalent C1-C6 alkylene, alkenylene or alkynylene radical which may contain an ether (—O—), thioether (—S—) or amino (—NR)— link, wherein R is hydrogen, —CN or C1-C3 alkyl; X is —C(?O)NR6—, —S(O)NR6—, —C(?O)O— or —S(?O)O— wherein R6 is hydrogen, optionally substituted C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, -Cyc, or —(C1-C3 alkyl)-Cyc wherein Cyc is optionally substituted monocyclic carbocyclic or heterocyclic having 3-7 ring atoms; Z is N; R2 and R3 are as defined in the description.
    Type: Application
    Filed: June 7, 2011
    Publication date: January 5, 2012
    Applicant: Biota Europe Limited
    Inventors: David John Haydon, Lloyd George Czaplewski, Nicholas John Palmer, Dale Robert Mitchell, John Frederick Atherall, Christopher Richard Steele, Tamara Ladduwahetty
  • Publication number: 20110263590
    Abstract: Compounds of formula (I) have antibacterial activity: wherein: m is 0 or 1; Q is hydrogen or cyclopropyl; Alk is an optionally substituted, divalent C1-C6 alkylene, alkenylene or alkynylene radical which may contain an ether (—O—), thioether (—S—) or amino (—NR)— link, wherein R is hydrogen, —CN or C1-C3 alkyl; X is —C(?O)NR6—, —S(O)NR6—, —C(?O)O— or —S(?O)O— wherein R6 is hydrogen, optionally substituted C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, -Cyc, or —(C1-C3 alkyl)-Cyc wherein Cyc is optionally substituted monocyclic carbocyclic or heterocyclic having 3-7 ring atoms; Z is N or CH, or CF; R2 and R3 are as defined in the description.
    Type: Application
    Filed: June 7, 2011
    Publication date: October 27, 2011
    Applicant: Biota Europe Limited
    Inventors: David John Haydon, Lloyd George Czaplewski, Nicholas John Palmer, Dale Robert Mitchell, John Frederick Atherall, Christopher Richard Steele, Tamara Ladduwahetty
  • Patent number: 7977340
    Abstract: Compounds of formula (I) have antibacterial activity: wherein: m is 0 or 1; Q is hydrogen or cyclopropyl; AIk is an optionally substituted, divalent C1-C6 alkylene, alkenylene or alkynylene radical which may contain an ether (—O—), thioether (—S—) or amino (—NR)— link, wherein R is hydrogen, —CN or C1-C3 alkyl; X is —C(?O)NR6—, —S(O)NR6—, —C(?O)O— or —S(?O)O— wherein R6 is hydrogen, optionally substituted C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, -Cyc, or —(C1-C3 alkyl)-Cyc wherein Cyc is optionally substituted monocyclic carbocyclic or heterocyclic having 3-7 ring atoms; Z is N or CH, or CF; R2 and R3 are as defined in the description.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: July 12, 2011
    Assignee: Prolysis Ltd.
    Inventors: David John Haydon, Lloyd George Czaplewski, Nicholas John Palmer, Dale Robert Mitchell, John Frederick Atherall, Christopher Richard Steele, Tamara Ladduwahetty
  • Patent number: 7592456
    Abstract: Compounds of formula (I) are potent and selective 5-HT2A antagonists, useful in treatment of a variety of adverse conditions of the CNS.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: September 22, 2009
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Mark Stuart Chambers, Neil Roy Curtis, Emanuela Gancia, Myra Gilligan, Alexander Charles Humphries, Tamara Ladduwahetty, Robert James Maxey, Kevin John Merchant
  • Publication number: 20090197877
    Abstract: Compounds of formula (I) have antibacterial activity: wherein: m is 0 or 1; Q is hydrogen or cyclopropyl; AIk is an optionally substituted, divalent C1-C6 alkylene, alkenylene or alkynylene radical which may contain an ether (—O—), thioether (—S—) or amino (—NR)— link, wherein R is hydrogen, —CN or C1-C3 alkyl; X is —C(?O)NR6—, —S(O)NR6—, —C(?O)O— or —S(?O)O— wherein R6 is hydrogen, optionally substituted C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, -Cyc, or —(C1-C3 alkyl)-Cyc wherein Cyc is optionally substituted monocyclic carbocyclic or heterocyclic having 3-7 ring atoms; Z is N or CH, or CF; R2 and R3 are as defined in the description.
    Type: Application
    Filed: June 21, 2007
    Publication date: August 6, 2009
    Applicant: Prolysis LTD.
    Inventors: David John Haydon, Lloyd George Czaplewski, Nicholas John Palmer, Dale Robert Mitchell, John Frederick Atherall, Christopher Richard Steele, Tamara Ladduwahetty
  • Publication number: 20090170824
    Abstract: Compounds of formula I: are potent and selective antagonists of the human 5-HT2A receptor, and hence useful in treatment of a variety of adverse conditions of the CNS.
    Type: Application
    Filed: December 12, 2008
    Publication date: July 2, 2009
    Inventors: Jose Luis Castro Pineiro, Laura Catherine Cooper, Myra Gilligan, Alexander Charles Humphries, Peter Alen Hunt, Tamara Ladduwahetty, Angus Murray MacLeod, Kevin John Merchant, Monique Bodil Van Niel, Kevin Wilson
  • Publication number: 20090012134
    Abstract: Compounds of formula (I): are potent and selective antagonists of the 5-HT2A receptor, and hence are useful in treatment of various CNS disorders.
    Type: Application
    Filed: March 10, 2006
    Publication date: January 8, 2009
    Inventors: Neil Roy Curtis, Emanuela Garcia, Tamara Ladduwahetty, Robert Maxey, Kevin Merchant, Andrew Mitchinson
  • Patent number: 7468393
    Abstract: Compounds of formula I: are potent and selective antagonists of the human 5-HT2A receptor, and hence useful in treatment of a variety of adverse conditions of the CNS.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: December 23, 2008
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Jose Luis Castro Pineiro, Laura Catherine Cooper, Myra Gilligan, Alexander Charles Humphries, Peter Alan Hunt, Tamara Ladduwahetty, Angus Murray MacLeod, Kevin John Merchant, Monique Bodil Van Niel, Kevin Wilson
  • Patent number: 7452899
    Abstract: Compounds of Formula (I): inhibit the processing of APP by gamma-secretase, and hence are useful for treatment or prevention of Alzheimer's disease.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: November 18, 2008
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Michela Bettati, Amanda Louise Boase, Ian Churcher, Tamara Ladduwahetty, Kevin John Merchant, Abdul Quddus
  • Publication number: 20080280956
    Abstract: Compounds of formula I: are potent and selective antagonists of the 5-HT2A receptor, and hence are useful in treatment of various 10 CNS disorders.
    Type: Application
    Filed: March 2, 2006
    Publication date: November 13, 2008
    Inventors: Myra Gilligan, Alexander Charles Humphries, Tamara Ladduwahetty, Kevin John Merchant
  • Publication number: 20070281952
    Abstract: Compounds of formula (I) are potent and selective 5-HT2A antagonists, useful in treatment of a variety of adverse conditions of the CNS.
    Type: Application
    Filed: November 28, 2005
    Publication date: December 6, 2007
    Inventors: Mark Chambers, Neil Curtis, Emanuela Gancia, Myra Gilligan, Alexander Humphries, Tamara Ladduwahetty, Robert Maxey, Kevin Merchant
  • Publication number: 20070203205
    Abstract: Compounds of formula I: are potent and selective antagonists of the human 5-HT2A receptor, and hence useful in treatment of a variety of adverse conditions of the CNS.
    Type: Application
    Filed: April 27, 2007
    Publication date: August 30, 2007
    Inventors: Jose Castro Pineiro, Laura Cooper, Myra Gilligan, Alexander Humphries, Peter Hunt, Tamara Ladduwahetty, Angus MacLeod, Kevin Merchant, Monique Van Niel, Kevin Wilson
  • Patent number: 7217740
    Abstract: Compounds of formula I: are potent and selective antagonists of the human 5-HT2A receptor, and hence useful in treatment of a variety of adverse conditions of the CNS.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: May 15, 2007
    Assignee: Merck Sharp and Dohme
    Inventors: Jose Luis Castro Pineiro, Laura Catherine Cooper, Myra Gilligan, Alexander Charles Humphries, Peter Alan Hunt, Tamara Ladduwahetty, Angus Murray MacLeod, Kevin John Merchant, Monique Bodil Van Niel, Kevin Wilson
  • Publication number: 20060211735
    Abstract: Compounds of formula (I): are selective antagonists of the 5-HT2A receptor, and hence are useful in treatment of adverse conditions at the central nervous system, such as sleep disorders and schizophrenia.
    Type: Application
    Filed: May 7, 2004
    Publication date: September 21, 2006
    Inventors: Myra Gilligan, Alexander Humphries, Tamara Ladduwahetty
  • Publication number: 20060189666
    Abstract: Compounds of Formula (I): inhibit the processing of APP by gamma-secretase, and hence are useful for treatment or prevention of Alzheimer's disease.
    Type: Application
    Filed: July 29, 2004
    Publication date: August 24, 2006
    Inventors: Michela Bettati, Amanda Boase, Ian Churcher, Tamara Ladduwahetty, Kevin Merchant, Abdul Quddus
  • Patent number: 7060710
    Abstract: The present invention provides compounds of formula I: in which: one of X and Y is a nitrogen atom substituted by a group R6? and the other is a carbon atom substituted by an isoxazole group substituted on its carbon atoms by groups R3 and R4; one of R6 and R6? is hydrogen; either all of W1, W2, W3 and W4 are carbon or one of W1, W2, W3 and W4 is nitrogen and the rest are carbon; and R1 and R2 are, independently, a small group, heteroaromatic ring or a 4–7 membered cyclic amine ring; processes for making them; pharmaceutical composition containing them; their use in therapy, particularly for enhancing cognition in conditions such as Alzheimer's Disease; and methods of treatment using them.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: June 13, 2006
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Tamara Ladduwahetty, Angus Murray MacLeod, Kevin John Merchant, Francine Sternfeld
  • Patent number: 7022724
    Abstract: The present invention relates to compounds of formula I: in which R1 is a linear group or a five membered heterocycle optionally fused to a phenyl ring, R2 is a 5-membered heterocycle, R3 is chosen from a range of substituents, m is 0–3 and n is 0 or 1; the compounds are generally inverse agonists at GABA-A receptors containing the alpha 5 subunit and so are useful in methods of enhancing cognition in subjects with diminished cognition in diseases such as Alzheimer's Disease.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: April 4, 2006
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Amanda Louise Boase, Tamara Ladduwahetty, Angus Murray MacLeod, Kevin John Merchant
  • Publication number: 20060052445
    Abstract: Compounds of formula I: are potent and selective antagonists of the human 5-HT2A receptor, and hence useful in treatment of a variety of adverse conditions of the CNS.
    Type: Application
    Filed: August 26, 2005
    Publication date: March 9, 2006
    Inventors: Jose Castro Pineiro, Laura Cooper, Myra Gilligan, Alexander Humphries, Peter Hunt, Tamara Ladduwahetty, Angus MacLeod, Kevin Merchant, Monique Van Niel, Kevin Wilson