Patents by Inventor Janos ri

Janos ri 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).

  • Acaricidally active tetrazine derivatives
    Patent number: 5455237
    Abstract: The invention relates to novel tetrazine derivatives of the formula (I), ##STR1## wherein X is fluorine, chlorine or bromine; andY is hydrogen or fluorine, as well as to a process for the preparation thereof.Furthermore, the invention relates to compositions containing the above compounds as well as to a process for the preparation thereof. The compounds and compositions according to the invention have acaricidal; larvicidal an ovicidal effects.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: October 3, 1995
    Assignee: Chinoin Gyogyszer Es Vegyeszeti Termekek Gyara RT.
    Inventors: Janis Hajimichael, Sandor Botar, Edit Bleicher, Laszlo Pap, Istvan Szekely, Katalin Marmarosi, Janos ri
  • Process for the preparation of diacyl-dianhydro hexitols
    Patent number: 4820852
    Abstract: The subject of the invention is an improved process for the industrial scale preparation of the compounds of the formula ##STR1## and salts thereof by acylating the hexitols of the formula (II) with an anhydride of the formula (II) at a temperature of 0.degree.-30.degree. C. in the presence of an organic base and a catalyst of the formula (IV) in a dipolar-aprotic or aprotic solvent.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: April 11, 1989
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara
    Inventors: Tibor Szabo, Ildiko Vidra nee Sandor, Gyula Dalmadi, Judit Kaczmarek nee Sebestyen, Janos ri