Patents by Inventor Anil M. Kumar

Anil M. Kumar 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: 6020337
    Abstract: Therapeutic compounds, including resolved enantiomers and/or diastereomers, hydrates, salts, solvates and mixtures thereof, having a formula: ##STR1## wherein R.sub.0 is selected from the group consisting of hydrogen, halo, hydroxyl, amino, substituted or unsubstituted C.sub.(1-10) alkyl, C.sub.(2-10) alkenyl, cyclic or heterocyclic groups, wherein the substituents of substituted C.sub.(1-10) alkyl, C.sub.(2-10) alkenyl are other than halo; n is an integer from one to sixteen; R.sub.1, R.sub.2, and R.sub.3 are independently selected from the group consisting of a halo; haloacetoxy; hydrogen; hydroxy; oxo; --N.dbd.C.dbd.S; --N.dbd.C.dbd.O; --0--C.tbd.N; --C.tbd.N; --N.dbd.N.dbd.N; and --C--(R.sub.5).sub.3, R.sub.5 being independently a halo or hydrogen, at least one R.sub.5 being halo, at least one of R.sub.1, R.sub.2, and R.sub.3 being halo, cyano, isocyano, isothiocyano, azide or haloacetoxy group; R.sub.4 is hydrogen, C.sub.(1-6) alkyl, C.sub.(1-6) alkenyl, cyclo C.sub.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: February 1, 2000
    Assignee: Cell Therapeutics, Inc.
    Inventors: Alistair J. Leigh, John Michnick, Anil M. Kumar, J. Peter Klein, Gail Underiner
  • Patent number: 5837703
    Abstract: Therapeutic compounds have the formula:(X)j-(core moiety),j being an integer from one to three, the core moiety comprising a core moiety, the core moiety being a heterocycle having one ring or two-fused rings, each ring having five or six ring atoms, A being a carbon atom of the core moiety and attached to a terminal carbon atom of (CH.sub.2).sub.m, and X has a structure and X being a racemic mixture, R or S enantiomer, solvate, hydrate, or salt of: ##STR1## *C is a chiral carbon atom, n is an integer from one to four (preferably from one to three), one or more carbon atoms of (CH.sub.2).sub.n may be substituted by a keto or hydroxy group, and m is an integer from one to fourteen. Independently, R.sub.1 and R.sub.2 may be a hydrogen, a straight or branched chain alkyl or alkenyl of up to twelve carbon atoms in length, or --(CH.sub.2).sub.w R.sub.5, w being an integer from two to fourteen and R.sub.5 being a mono-, di- or tri-substituted or unsubstituted aryl group, substituents on R.sub.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: November 17, 1998
    Assignee: Cell Therapeutics, Inc.
    Inventors: Anil M. Kumar, John Michnick, Gail E. Underiner, J. Peter Klein, Glenn C. Rice
  • Patent number: 5824677
    Abstract: Disclosed are compounds having a straight or branched aliphatic hydrocarbon structure of formula I: ##STR1## In formula I, n is an integer from one to four and m is an integer from four to twenty. Independently, R.sub.1 and R.sub.2 are hydrogen, a straight or branched chain alkyl, alkenyl or alkynyl of up to twenty carbon atoms in length or --(CH.sub.2).sub.w R.sub.5. If R.sub.1 or R.sub.2 is --(CH.sub.2).sub.w R.sub.5, w may be an integer from one to twenty and R.sub.5 may be an hydroxyl, halo, C.sub.1-8 alkoxyl group or a substituted or unsubstituted carbocycle or heterocycle. Alternatively, R.sub.1 and R.sub.2 may jointly form a substituted or unsubstituted, saturated or unsaturated heterocycle having from four to eight carbon atoms, N being a hetero atom of the resulting heterocyle. R.sub.3 may be either hydrogen or C.sub.13. In the compounds, a total sum of carbon atoms comprising R.sub.1 or R.sub.2, (CH.sub.2).sub.n and (CH.sub.2).sub.m does not exceed forty. R.sub.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 20, 1998
    Assignee: Cell Therapeutics, Inc.
    Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar
  • Patent number: 5807861
    Abstract: A method for treating a disease caused by an undesirable cell response mediated by a proliferative intracellular signaling pathway is provided wherein an effective amount of a compound is administered. The compound, resolved enantiomers, diastereomers, hydrates, salts, solvates and mixtures thereof, has the formulaCORE MOIETY--(R).sub.jwherein j is an integer from one to three; the core moiety is xanthinyl; and R is independently selected from the group consisting of amine, hydrogen, halogen, hydroxyl, C.sub.(1-10) alkyl, C.sub.(2-10) alkenyl, 2-bromopropyl, 4-chloropentyl, cyclohexyl, cyclopentyl, 3-dimethylaminobutyl, 2-hydroxyethyl, 5-hydroxyhexyl, 3-hydroxy-n-butyl, 3-hydroxypropyl, 2-methoxyethyl, 4-methoxy-n-butyl, phenyl, and formula I, at least one R comprising formula I ##STR1## wherein (CH.sub.2).sub.n is optionally substituted; n is an integer from five to twenty; each R.sub.1 or R.sub.2 is independently hydrogen or an optionally substituted group that is herein defined; andwherein, when the (CH.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 15, 1998
    Assignee: Cell Therapeutics, Inc.
    Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar, Lance H. Ridgers, Glenn C. Rice, David W. Leung
  • Patent number: 5807862
    Abstract: Therapeutic compounds with at least one carboxylic acid, ester or amide-substituted side chain have the formula:CORE MOIETY--(R).sub.jwherein j is an integer from one to three. The core moiety is non-cyclic or cyclic (carbocyclic or heterocyclic). R may be selected from among hydrogen, halogen, hydroxyl, amino, substituted or unsubstituted C.sub.(1-10) alkyl, C.sub.(2-10) alkenyl, carbocyclic or heterocyclic groups and at least one R has the formula I: ##STR1## wherein: one or two p are the integer one, otherwise p is two; and n is an integer from three to twenty; R.sub.1 is selected from the group consisting of substituted and unsubstituted CH.sub.2 ; NR.sub.3, R.sub.3 being hydrogen, substituted or unsubstituted C.sub.(1-20) alkyl, C.sub.(1-20) alkoxyl, C.sub.(2-20) alkenyl or C.sub.(1-20) hydroxyalkyl, or carbocyclic or heterocyclic group; O; --CHR.sub.4 O--, R.sub.4 being substituted or unsubstituted C.sub.(1-20) alkyl, C.sub.(1-20) alkoxyl, C.sub.(2-20) alkenyl, C.sub.(1-20) hydroxyalkyl, or R.sub.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 15, 1998
    Assignee: Cell Therapeutics, Inc.
    Inventors: J. Peter Klein, Alistair J. Leigh, Gail E. Underiner, Anil M. Kumar
  • Patent number: 5801182
    Abstract: Compounds and pharmaceutical compositions, including resolved enantiomers and/or diastereomers, hydrates, salts, solvates and mixtures thereof, have the formula:CORE MOIETY --(R).sub.jIn these compounds, j is an integer from one to three; the core moiety is a cyclic core, the cyclic core being non-cyclic or at least one five- to seven-member non-heterocyclic ring or heterocycle; and R is selected from the group consisting of amine, hydrogen, halogen, hydroxyl, substituted or unsubstituted C.sub.(1-10) alkyl, C.sub.(2-10) alkenyl, cyclic or heterocyclic group or formula I. At least one R having formula I: ##STR1## In formula I, n is an integer from four to twenty; and each R.sub.1 or R.sub.2 is independently hydrogen, substituted or unsubstituted C.sub.(1-20) alkyl, C.sub.(1-20) alkoxyl, C.sub.(2-20) alkenyl or cyclic or heterocyclic group.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 1, 1998
    Assignee: Cell Therapeutics, Inc.
    Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar, Lance H. Ridgers
  • Patent number: 5777117
    Abstract: Disclosed is a process for preparing compounds having a straight or branched aliphatic hydrocarbon structure of formula I: ##STR1## In formula I, n is an integer from one to four and m is an integer from four to twenty. Independently, R.sub.1 and R.sub.2 are hydrogen, a straight or branched chain alkyl, alkenyl or alkynyl of up to twenty carbon atoms in length or --(CH.sub.2).sub.w R.sub.5. If R.sub.1 or R.sub.2 is --(CH.sub.2).sub.w R.sub.5, w may be an integer from one to twenty and R.sub.5 may be an hydroxyl, halo, C.sub.1-8 alkoxyl group or a substituted or unsubstituted carbocycle or heterocycle. Alternatively, R.sub.1 and R.sub.2 may jointly form a substituted or unsubstituted, saturated or unsaturated heterocycle having from four to eight carbon atoms, N being a hetero atom of the resulting heterocyle. R.sub.3 may be either hydrogen or C.sub.1-3. In the compounds, a total sum of carbon atoms comprising R.sub.1 or R.sub.2, (CH.sub.2).sub.n and (CH.sub.2).sub.m does not exceed forty. R.sub.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 7, 1998
    Assignee: Cell Therapeutics, Inc.
    Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar
  • Patent number: 5756511
    Abstract: A method for treating symptoms of Alzheimer's Disease by administering an effective amount of a compound, racemate, isolated R or S enantionmer, solvate, hydrate or salt having the formula:X--terminal heterocyclic moiety.In the above formula, the terminal heterocyclic moiety is a 3,7-dimethylxanthinyl, 3-methylxanthinyyl or xanthinyl moiety and X is: ##STR1## n is zero or an integer from one to four; and m is an integer from seven to fourteen. For compounds useful in the inventive method, R.sub.1 and R.sub.2 are hydrogen, a straight or branched chain alkyl, alkenyl or alkynyl of up to twenty carbon atoms in length or --(CH.sub.2).sub.w R.sub.5. w may be an integer from one to twenty and R.sub.5 is preferably an hydroxyl, halo C.sub.1-8 alkoxyl group or a substituted or unsubstituted carbocycle or heterocycle. R.sub.3 in compounds useful in the inventive method may be either an hydroxyl group, an oxygen atom, the single bond represented being instead a double bond, or --O--R.sub.4, R.sub.4 being a C.sub.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: May 26, 1998
    Assignee: Cell Therapeutics, Inc.
    Inventors: James W. West, David W. Leung, J. Peter Klein, Gail E. Underiner, Anil M. Kumar
  • Patent number: 5750575
    Abstract: Disclosed are compounds having a straight or branched aliphatic hydrocarbon structure of formula I: ##STR1## In formula I, n is an integer from one to four and m is an integer from four to twenty. Independently, R.sub.1 and R.sub.2 are hydrogen, a straight or branched chain alkyl, alkenyl or alkynyl of up to twenty carbon atoms in length or --(CH.sub.2).sub.w R.sub.5. If R.sub.1 or R.sub.2 is --(CH.sub.2).sub.w R.sub.5, w may be an integer from one to twenty and R.sub.5 may be an hydroxyl, halo, C.sub.1-8 alkoxyl group or a substituted or unsubstituted carbocycle or heterocycle. Alternatively, R.sub.1 and R.sub.2 may jointly form a substituted or unsubstituted, saturated or unsaturated heterocycle having from four to eight carbon atoms, N being a hetero atom of the resulting heterocyle. R.sub.3 may be either hydrogen or C.sub.1-3. In the compounds, a total sum of carbon atoms comprising R.sub.1 or R.sub.2, (CH.sub.2).sub.n and (CH.sub.2).sub.m does not exceed forty. R.sub.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 12, 1998
    Assignee: Cell Therapeutics, Inc.
    Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar
  • Patent number: 5641783
    Abstract: Disclosed are compounds having a straight or branched aliphatic hydrocarbon structure of formula I: ##STR1## In formula I, n is an integer from one to four and m is an integer from four to twenty. Independently, R.sub.1 and R.sub.2 are hydrogen, a straight or branched chain alkyl, alkenyl or alkynyl of up to twenty carbon atoms in length or --(CH.sub.2).sub.w R.sub.5. If R.sub.1 or R.sub.2 is --(CH.sub.2).sub.w R.sub.5, w may be an integer from one to twenty and R.sub.5 may be an hydroxyl, halo, C.sub.1-8 alkoxyl group or a substituted or unsubstituted carbocycle or heterocycle. Alternatively, R.sub.1 and R.sub.2 may jointly form a substituted or unsubstituted, saturated or unsaturated heterocycle having from four to eight carbon atoms, N being a hetero atom of the resulting heterocycle. R.sub.3 may be either hydrogen or C.sub.1-3. In the compounds, a total sum of carbon atoms comprising R.sub.1 or R.sub.2, (CH.sub.2).sub.n and (CH.sub.2).sub.m does not exceed forty. R.sub.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: June 24, 1997
    Assignee: Cell Therapeutics, Inc.
    Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar
  • Patent number: 5629423
    Abstract: A process for synthesizing enantiomerically pure chiral secondary alcohol compounds linked to a heterocyclic core moiety, using a natural chiral molecule starting material. The inventive process is particularly useful for bulk manufacturing of chiral secondary alcohol compounds.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: May 13, 1997
    Assignee: Cell Therapeutics, Inc.
    Inventors: J. Peter Klein, Alistair J. Leigh, John Michnick, Anil M. Kumar, Gail E. Underiner