Patents by Inventor Zoltan Hajos

Zoltan Hajos 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-Substituted pyrazolo[3,4-D]pyrimidine derivatives
    Patent number: 4885300
    Abstract: 4-Substituted pyrazolo[3,4-d]pyrimidine derivatives and a method of synthesis for the derivatives are described. The 4-substituted pyrazolopyrimidine derivatives are useful as cardiotonic agents and antiarryhythmic agents.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: December 5, 1989
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Jeffery B. Press, Zoltan Hajos
  • 4-substituted pyrazolo[3,4-d]pyrimidine derivatives
    Patent number: RE35072
    Abstract: 4-Substituted pyrazolo[3,4-d]pyrimidine derivatives and a method of synthesis for the derivatives are described. The 4-substituted pyrazolopyrimidine derivatives are useful as cardiotonic agents and antiarryhythmic agents.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: October 24, 1995
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Jeffery B. Press, Zoltan Hajos