Patents by Inventor Hajnalka Petho

Hajnalka Petho 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).

  • Cimetidine Z, a new crystal modification of cimetidine
    Patent number: 4537900
    Abstract: The invention relates to a new crystal modification of N-methyl-N'-{2-[(5-methylimidazol-4-yl)-methylthio]-ethyl}-N"-cyanoguanidi ne (cimetidine), a histamine H-2 receptor antagonist having the Formula (I) ##STR1## as well as to a process for preparing same. In the description, this new modification is named N-methyl-N'-{2-[(5-methylimidazol-4-yl)-methylthio]-ethyl}-N"-cyanoguanidi ne Z (cimetidine Z).
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: August 27, 1985
    Assignee: Richter Gedeon Vegyeszeti Gyar R.T.
    Inventors: Janos Kreidl, Maria Farkas nee Kirjak, Kalman Harsanyi, Bela Benke, Andras Rado, Gyorgy Domany, Bela Hegedus, Eva Csongor, Ida Deutsch nee Juhasz, Hajnalka Petho