Patents by Inventor Kostas Karabelas

Kostas Karabelas 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: 20030134886
    Abstract: The present invention relates to compounds of formula (I) 1
    Type: Application
    Filed: November 6, 2002
    Publication date: July 17, 2003
    Applicant: ASTRAZENECA AB, a Swedish Corporation
    Inventors: Kostas Karabelas, Matti Lepisto, Peter Sjo
  • Patent number: 6492409
    Abstract: The present invention relates to compounds of formula (I) wherein: Ar1 or Ar2 is an optionally substituted indole, and the other group is an optionally substituted aromatic or heteroaromatic group, suitably an optionally substituted bicyclic heteroaromatic group, preferably an optionally substituted indole, X is O or S, R is H, OH, NH2, C1-6alkyl, hydroxyC1-6alkyl, aminoC1-6alkyl, and R1 is H, C1-6alkyl, fluoro substituted C1-6alkyl, phenyl, benzyl, carboC1-6alkoxy, carbobensyloxy, carbohydroxy, carbamoyl, or methyl(N-C1-6alkylcarbamoyl) and salts and solvates thereof and solvates of such salts, and the use of such compounds in medical therapies.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: December 10, 2002
    Assignee: Astrazeneca AB
    Inventors: Kostas Karabelas, Matti Lepistö, Peter Sjö
  • Patent number: 6492406
    Abstract: The present invention relates to novel compounds which are protein kinase C inhibitors, methods for their preparation, intermediates therefor and pharmaceutical compositions comprising them. More particularly, the present invention relates to compounds of formula (I): wherein: one of Ar1 and Ar2 is optionally substituted bicyclic heteroaryl or optionally substituted tricyclic heteroaryl and the other is optionally substituted heteroaryl or optionally substituted aryl; X is O or S; and R is H, OH, NH2 or C1-6 alkyl (itself optionally substituted by amino or hydroxy); or a salt or solvate thereof, or a solvate of a salt thereof; and the use of such compounds in medical therapies.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: December 10, 2002
    Assignee: Astrazeneca AB
    Inventors: Kostas Karabelas, Matti Lepistö, Peter Sjö
  • Patent number: 6458792
    Abstract: The present invention provides inhibitors of protein kinase C, of formula (I) wherein: one of: R1 and R2, R2 and R3 or R3 and R4, together form a 5 or 6 membered ring and the two groups of R1, R2, R3 and R4 not forming a ring, are H; and salts thereof, formulations comprising said inhibitors of protein kinase C of formula (I), processes for preparation thereof and use thereof in the manufacture of a medicament for the treatment of inflammatory, immunological, bronchopulmonary, cardiovascular, oncological or CNS-degenerative disorders.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: October 1, 2002
    Assignee: AstraZeneca AB
    Inventors: Kostas Karabelas, Peter Sjö
  • Patent number: 6346625
    Abstract: The present invention relates to compounds of formula (I) wherein: Ar1 or Ar2 is an optionally substituted indole, and the other group is an optionally substituted aromatic or heteroaromatic group, preferably an optionally substituted indole, X is O or S, and R2 is H, hydroxy, amino, C1-6alkyl, hydroxyC1-6alkyl or aminoC1-6alkyl, and salts and solvates thereof and solvates of such salts, and the use of such compounds in medical therapies.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: February 12, 2002
    Assignee: AstraZeneca AB
    Inventors: Kostas Karabelas, Matti Lepistö, Peter Sjö
  • Patent number: 6337342
    Abstract: The present invention relates to compounds of formula (I): wherein: Ar is an optionally substituted aromatic or heteroaromatic group, R1 is H, C1-6alkyl, CF3, phenyl, benzyl, carboC1-6alkoxy, carbamoyl, or methyl(N—C1-6alkylcarbamoyl) R2 is H, C1-6alkyl, aminoC1-6alkyl, hydroxyC1-6alkyl, (mono- or di- C1-6alkyl)aminoC1-6alkyl, (aminoC1-3alkylphenyl)C1-3alkyl, amidinothio C1-6alkyl, R3 is H or C1-6alkoxy, R4 is H or together with R2, forms an annulated ring which may be substituted by hydroxyC1-3alkyl or amidinothio C1-3alkyl, or aminoC1-3alkyl; and pharmaceutically acceptable salts thereof; and the use of such compounds in medical therapies.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: January 8, 2002
    Assignee: AstraZeneca AB
    Inventors: Kostas Karabelas, Matti Lepisto, Peter Sjö
  • Publication number: 20010025043
    Abstract: The present invention provides optionally substituted and/or annulated compounds of formula (I) 1
    Type: Application
    Filed: May 25, 2001
    Publication date: September 27, 2001
    Applicant: Astra Aktiebolag, a Sweden corporation
    Inventors: Hakan Bergstrand, Kostas Karabelas, Peter Sjo
  • Patent number: 6271231
    Abstract: The present invention provides optionally substituted and/or annulated compounds of formula (I) wherein X, Y, Z and A is each independently carbon or nitrogen, and at least two of X, Y, Z and A are carbon; and pharmaceutically acceptable salts thereof with the proviso that: 3-(1H-Indol-3-yl)-1H-quinoxalin-2-one, 3-(2-Methyl-1H-indol-3-yl)-1H-quinoxalin-2-one, and 3-(1,2-Diphenyl-1H-indol-3-yl)-1H-quinoxalin-2-one are excluded from compounds of formula (I). The invention includes the use of compounds of formula (I) in medical therapy, particularly in the therapy of conditions requiring inhibition of protein kinase C.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: August 7, 2001
    Assignee: Astra Aktiebolag
    Inventors: Håkan Bergstrand, Kostas Karabelas, Peter Sjö
  • Patent number: 6228374
    Abstract: Novel homodimers that include cysteine-containing peptides having 4-15 amino acid residues can be administered to modulate the immune response in an animal.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: May 8, 2001
    Assignee: Astra Aktiebolag
    Inventors: Håkan Bergstrand, Tomas Eriksson, Kostas Karabelas, Magnus Lindvall, Bengt Särnstrand
  • Patent number: 6153641
    Abstract: The present invention provides novel compounds of the formula (I):R.sub.20 --(CH.sub.2).sub.n --R (I)wherein:T.sub.20 is a bisindolylmaleimide moiety linked to the --(CH.sub.2).sub.n -group through an indolyl nitrogen,n is 0 or 1,R is a 5 or 6 membered aromatic carbocyclic or heterocyclic ring, the heterocyclic ring containing N or S,R is substituted by R.sub.1 and up to four of R.sub.2, R.sub.3, R.sub.4 and R.sub.5,wherein;R.sub.1 is aminomethyl, (N--(C.sub.1-4 -alkyl)amino)methyl, (N,N-di(C.sub.1-4 -alkyl)amino)methyl or pyridiniummethyl, andR.sub.2, R.sub.3, and R.sub.4 and R.sub.5 (if present), which may be the same or different, are each hydrogen, hydroxy, C.sub.1-4 -alkoxy, C.sub.1-4 -alkoxy) or halogen,or R.sub.2 when in a position contiguous to the bond connecting R to the --(CH.sub.2).sub.n -- group and n is 1 may, together with the 2-carbon atom on the indole to which the --(CH.sub.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: November 28, 2000
    Assignee: Astra Aktiebolag
    Inventors: H.ang.kan Bergstrand, Thomas Hogberg, Kostas Karabelas, Anders Tunek
  • Patent number: 6103697
    Abstract: Novel homodimers that include cysteine-containing peptides having 4-15 amino acid residues can be administered to modulate the immune response in an animal.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: August 15, 2000
    Assignee: Astra Aktiebolag
    Inventors: H.ang.kan Bergstrand, Tomas Eriksson, Kostas Karabelas, Magnus Lindvall, Bengt Sarnstrand