Patents by Inventor Tom Wikberg

Tom Wikberg 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).

  • (-)-[[4-(1,4,5,6-tetrahydro-4-m ethyl-6-oxo-3-pyridazinyl)phenyl]-hydrazono]propanedinitrile
    Patent number: 5569657
    Abstract: The compound (-)-[[4-(1,4,5,6 tetrahydro-4-methyl-6-oxo-3 pyridazinyl) phenyl]-hydrazono] propane dinitrile and its salts are prepared and used for treating congestive heart failure.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: October 29, 1996
    Assignee: Orion-yhtyma Oy
    Inventors: Pentti Nore, Erkki Honkanen, Reijo B ackstr om, Tom Wikberg, Heimo Haikala, Jorma Haarala
  • (-) 4-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)phenyl!-hydra-zono! propanedinitrile
    Patent number: 5512571
    Abstract: Diastereomeric intermediate salts of formulae (IIIa) or (IIIb) ##STR1## are prepared.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: April 30, 1996
    Assignee: Orion-yhtyma Oy
    Inventors: Pentti Nore, Erkki Honkanen, Reijo Backstrom, Tom Wikberg, Heimo Haikala, Jorma Haarala
  • ( -)-[[4-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)phenyl]-hydrazono]p r
    Patent number: 5424428
    Abstract: Optically substantially pure (-) enantiomer of [[4-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)phenyl]hydrazono)prop anedinitrile or pharmaceutically acceptable salt thereof, intermediates and a process for the preparation are described. The product is useful as a cardiotonic agent, antihypertensive and vasodilator for the treatment of congestive heart failure.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: June 13, 1995
    Assignee: Orion-yhtyma Oy
    Inventors: Pentti Nore, Erkki Honkanen, Reijo Backstrom, Tom Wikberg, Heimo Haikala, Jorma Haarala