Patents by Inventor Ivanka A. Atanassova

Ivanka A. Atanassova 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).

  • Penicillin derivatives
    Patent number: 4711956
    Abstract: The invention relates to penicillin derivatives of Formula I, and a method of synthesis; the derivatives having high antimicrobial activity against gram-positive and gram-negative microorganisms. ##STR1## R is selected from the group consisting of ##STR2## R.sub.1 is selected from the group consisting of hydrogen and a hydroxyl group;R.sub.2 is selected from the group consisting of hydrogen, an alkaline metal, and a carboxy protective group;R.sub.3 is selected from the group consisting of hydrogen, a lower alkyl, and a phenyl residue;R.sub.4, R.sub.5, and R.sub.6 are each selected from the group consisting of hydrogen, a halogen, a lower alkyd, and a lower alkoxy group;A is selected from the group consisting of oxygen and a N-(lower alkyl) residue; andn is 0 or 1.
    Type: Grant
    Filed: July 17, 1985
    Date of Patent: December 8, 1987
    Assignee: TPO "Pharmachim"
    Inventors: Ivanka A. Atanassova, Marieta A. Haimova, Vesselina B Chavdarova, Anton I. Nakov, Nedelcho G. Petkov, Ruska S. Avramova