Patents by Inventor Gail E. Underiner
Gail E. Underiner 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).
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Patent number: 6693105Abstract: Disclosed are therapeutic compounds having the formula: (R)j—(CORE MOIETY), including resolved enantiomers, diastereomers, hydrates, salts, solvates or mixtures thereof where j is an integer from one to three. The core moiety is a bicyclic ring structure having at least one heterocyclic ring that contains five to six ring atoms and up to two nitrogen heteroatoms. R is selected from the group consisting of hydrogen, halogen, hydroxyl, amino, substituted or unsubstituted benzyl, C1-6 alkyl or C1-6 alkenyl, and at least one R has the formula I: n is an integer from 1 to 20, at least one of X or Y is —OH. Another of X or Y, which is not —OH, is hydrogen, CH3—, CH3—CH2—, CH3—(CH2)2—or (CH3)2—CH2—, and each W1, W2, and W3 is independently hydrogen, CH3—, CH3—CH2—, CH3—(CH2)2— or (CH3)2—CH2—.Type: GrantFiled: July 27, 1999Date of Patent: February 17, 2004Assignee: Cell Therapeutics, Inc.Inventors: Gail E. Underiner, David Porubek, J. Peter Klein, Paul Woodson, Stephen J. Klaus, Anil M. Kumar, John Tulinsky
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Publication number: 20030207901Abstract: Disclosed are therapeutic compounds having the formula:Type: ApplicationFiled: May 14, 2003Publication date: November 6, 2003Applicant: Cell Therapeutics, Inc.Inventors: Gail E. Underiner, David Porubek, J. Peter Klein, Paul Woodson, Stephen J. Klaus, Anil M. Kumar, John Tulinsky
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Patent number: 6133274Abstract: Disclosed are therapeutic compounds having the formula:(R)j-(core moiety),including resolved enantiomers, diastereomers, hydrates, salts, solvates and mixtures thereof. j is an integer from one to three, the core moiety is either non-cyclic or comprises at least one five- to seven-membered ring structure, R may be selected from the group consisting of hydrogen, halogen, hydroxyl, amino, substituted or unsubstituted benzyl, C.sub.1-6 alkyl or C.sub.1-6 alkenyl, and at least one R has the formula I: ##STR1## n is an integer from seven to twenty and at least one of X or Y is --OH. The other of X or Y, which is not --OH, is hydrogen, CH.sub.3 --, CH.sub.3 --CH.sub.2 --, CH.sub.3 --(CH.sub.2).sub.2 -- or (CH.sub.3).sub.2 --CH.sub.2 --, and each W.sub.1, W.sub.2, and W.sub.3 is independently hydrogen, CH.sub.3 --, CH.sub.3 --CH.sub.2 --, CH.sub.3 --(CH.sub.2).sub.2 -- or (CH.sub.3).sub.2 --CH.sub.2 --. The X, Y, W.sub.1, W.sub.2, or W.sub.Type: GrantFiled: November 26, 1996Date of Patent: October 17, 2000Assignee: Cell Therapeutics, Inc.Inventors: Gail E. Underiner, David Porubek, J. Peter Klein, Paul Woodson
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Patent number: 6103730Abstract: 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: GrantFiled: June 7, 1995Date of Patent: August 15, 2000Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar, Lance H. Ridgers
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Patent number: 6100271Abstract: 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: GrantFiled: June 7, 1995Date of Patent: August 8, 2000Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Alistair J. Leigh, Gail E. Underiner, Anil M. Kumar
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Patent number: 6043250Abstract: 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: GrantFiled: June 7, 1995Date of Patent: March 28, 2000Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Alistair J. Leigh, Gail E. Underiner, Anil M. Kumar, Glenn C. Rice
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Patent number: 5985926Abstract: There is disclosed a method of preventing or delaying the occurrence of acquired immunodeficiency syndrome (AIDS) in human immunodeficiency virus (HIV) seropositive humans by administering an effective amount of a compound that inhibits cellular signaling through a specific phospholipid-based cellular signaling and signal amplification pathway. The invention further provides a method for preventing or delaying clinical symptoms of a group of viral diseases wherein the viral disease is mediated by host cell viral replication. The invention provides an advantage by attacking host cellular signaling mechanisms to prevent the development of drug resistance from rapidly mutating viruses.Type: GrantFiled: February 10, 1997Date of Patent: November 16, 1999Assignee: Cell Therapeutics, Inc.Inventors: David W. Leung, Gail E. Underiner, Jack W. Singer
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Patent number: 5889011Abstract: Compounds and pharmaceutical compositions thereof comprise the formula:(R)j- (core moiety),including resolved enantiomers and/or diastereomers, hydrates, salts, solvates and mixtures thereof, wherein J is an integer from one to three, the core moiety is non-cyclic or comprises at least one, five- to seven-membered ring structure, R may be selected from the group consisting of hydrogen, halogen, hydroxyl, amino, substituted or unsubstituted benzyl, alkyl (C.sub.1-6) or alkenyl (C.sub.1-6), and at least one R has the formula I: ##STR1## wherein n is an integer from four to eighteen; each R'.sub.1 and R'.sub.2 is independently hydrogen, alkyl (C.sub.1-4) or alkenyl (C.sub.1-4), the alkyl or alkenyl groups being preferably substituted by a halogen, hydroxyl, ketone or dimethylamino group and/or may be interrupted by an oxygen or hydrogen atom or an alkyl (C.sub.1-4) group; and each R'.sub.3 and R'.sub.4 is independently hydrogen or methyl. Preferably, n is an integer from six to ten, R'.sub.1 and R'.sub.Type: GrantFiled: June 27, 1997Date of Patent: March 30, 1999Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Gail E. Underiner, Alistair J. Leigh
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Patent number: 5837703Abstract: 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: GrantFiled: November 12, 1993Date of Patent: November 17, 1998Assignee: Cell Therapeutics, Inc.Inventors: Anil M. Kumar, John Michnick, Gail E. Underiner, J. Peter Klein, Glenn C. Rice
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Patent number: 5824677Abstract: 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: GrantFiled: June 7, 1995Date of Patent: October 20, 1998Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar
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Patent number: 5817662Abstract: Compounds and pharmaceutical compositions thereof comprise the formula:(R)j-(core moiety),including resolved enantiomers and/or diastereomers, hydrates, salts, solvates and mixtures thereof, wherein J is an integer from one to three, the core moiety is non-cyclic or comprises at least one, five- to seven-membered ring structure, R may be selected from the group consisting of hydrogen, halogen, hydroxyl, amino, substituted or unsubstituted benzyl, alkyl (C.sub.1-6) or alkenyl (C.sub.1-6), and at least one R has the formula I: ##STR1## wherein n is an integer from four to eighteen; each R'.sub.1 and R'.sub.2 is independently hydrogen, alkyl (C.sub.1-4) or alkenyl (C.sub.1-4), the alkyl or alkenyl groups being preferably substituted by a halogen, hydroxyl, ketone or dimethylamino group and/or may be interrupted by an oxygen or hydrogen atom or an alkyl (C.sub.1-4) group; and each R'.sub.3 and R'.sub.4 is independently hydrogen or methyl. Preferably, n is an integer from six to ten, R'.sub.1 and R'.sub.Type: GrantFiled: June 6, 1995Date of Patent: October 6, 1998Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Gail E. Underiner, Alistair J. Leigh
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Patent number: 5807861Abstract: 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: GrantFiled: June 7, 1995Date of Patent: September 15, 1998Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar, Lance H. Ridgers, Glenn C. Rice, David W. Leung
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Patent number: 5807862Abstract: 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: GrantFiled: June 7, 1995Date of Patent: September 15, 1998Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Alistair J. Leigh, Gail E. Underiner, Anil M. Kumar
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Patent number: 5804584Abstract: Disclosed are therapeutic compounds having the formula:(R)j-(core moiety),including resolved enantiomers, diastereomers, hydrates, salts, solvates and mixtures thereof. j is an integer from one to three, the core moiety is either non-cyclic or comprises at least one five- to seven-membered ring structure, R may be selected from the group consisting of hydrogen, halogen, hydroxyl, amino, substituted or unsubstituted benzyl, C.sub.1-6 alkyl or C.sub.1-6 alkenyl, and at least one R has the formula I: ##STR1## n is an integer from seven to twenty and at least one of X or Y is --OH. The other of X or Y, which is not --OH, is hydrogen, CH.sub.3 --, CH.sub.3 --CH.sub.2 --, CH.sub.3 --(CH.sub.2).sub.2 -- or (CH.sub.3).sub.2 --CH.sub.2 --, and each W.sub.1, W.sub.2, and W.sub.3 is independently hydrogen, CH.sub.3 --, CH.sub.3 --CH.sub.2 --, CH.sub.3 --(CH.sub.2).sub.2 -- or (CH.sub.3).sub.2 --CH.sub.2 --. The X, Y, W.sub.1, W.sub.2, or W.sub.Type: GrantFiled: June 6, 1995Date of Patent: September 8, 1998Assignee: Cell Therapeutics, Inc.Inventors: Gail E. Underiner, David Porubek, J. Peter Klein, Paul Woodson
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Patent number: 5801181Abstract: Therapeutic compounds have the formula:(X)j--(core moiety),J being an integer from one to three, the core moiety having at least one, five- to seven-membered ring and X being a racemic mixture, R or S enantiomer, slovate, 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 alkane or alkene 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.5 being hydroxy, chloro, fluoro, bromo, or C.sub.1-6 alkoxy. Or jointly, R.sub.1 and R.sub.Type: GrantFiled: June 7, 1995Date of Patent: September 1, 1998Assignee: Cell Therapeutics, Inc.Inventors: John Michnick, Gail E. Underiner, J. Peter Klein, Glenn C. Rice
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Patent number: 5801182Abstract: 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: GrantFiled: June 7, 1995Date of Patent: September 1, 1998Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar, Lance H. Ridgers
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Patent number: 5780476Abstract: Disclosed are therapeutic compounds having the formula:(R)j - (core moiety),including resolved enantiomers, diastereomers, hydrates, salts, solvates and mixtures thereof. j is an integer from one to three, the core moiety is either non-cyclic or comprises at least one five- to seven-membered ring structure, R may be selected from the group consisting of hydrogen, halogen, hydroxyl, amino, substituted or unsubstituted benzyl, C.sub.1-6 alkyl or C.sub.1-6 alkenyl, and at least one R has the formula I: ##STR1## n is an integer from seven to twenty and at least one of X or Y is --OH. The other of X or Y, which is not --OH, is hydrogen, CH.sub.3 --, CH.sub.3 --CH.sub.2 --, CH.sub.3 --(CH.sub.2).sub.2 -- or (CH.sub.3).sub.2 --CH.sub.2 --, and each W.sub.1, W.sub.2, and W.sub.3 is independently hydrogen, CH.sub.3 --, CH.sub.3 --CH.sub.2 --, CH.sub.3 --(CH.sub.2).sub.2 -- or (CH.sub.3).sub.2 --CH.sub.2 --. The X, Y, W.sub.1, W.sub.2, or W.sub.Type: GrantFiled: June 6, 1995Date of Patent: July 14, 1998Assignee: Cell Therapeutics, Inc.Inventors: Gail E. Underiner, David Porubek, J. Peter Klein, Paul Woodson
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Patent number: 5777117Abstract: 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: GrantFiled: June 7, 1995Date of Patent: July 7, 1998Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar
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Patent number: 5756511Abstract: 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: GrantFiled: April 3, 1995Date of Patent: May 26, 1998Assignee: Cell Therapeutics, Inc.Inventors: James W. West, David W. Leung, J. Peter Klein, Gail E. Underiner, Anil M. Kumar
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Patent number: 5750575Abstract: 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: GrantFiled: June 7, 1995Date of Patent: May 12, 1998Assignee: Cell Therapeutics, Inc.Inventors: J. Peter Klein, Gail E. Underiner, Anil M. Kumar