Patents by Inventor Janos Szvoboda

Janos Szvoboda 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).

  • Diaclyl-substituted methylene-2,2,4-trimethyl-1,2-dihydroquinolines and a process for the preparation thereof
    Patent number: 4994469
    Abstract: There are provided new compounds of the Formula I ##STR1## obtained by the condensation of 2,2,2-trimethyl-1,2-dihydroquinoline or salts thereof with an oxo derivative of the Formula R.sub.1 R.sub.2 CO--whereinR.sub.1 stands for optionally substituted C.sub.1-4 alkyl andR.sub.2 stands for optionally substituted C.sub.1-2 alkyl,X stands for hydrogen or SO.sub.3 M--wherein M stands for hydrogen, alkali or alkaline earth metal ion,Y stands for hydrogen or acyl. The new compounds can be used as antioxidants, and particularly for increasing coccidiostatic effect.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: February 19, 1991
    Assignee: Material Vegyipari Kisszovetkezet
    Inventors: Janos Szvoboda, Tamas Rozsnyai, Jozsef Szente, Laszlo Melovits, Imre tvos, Ilona Legradi, Laszlo Prohaszka, Jeno Fekete
  • Dihydroquinoline derivatives of antioxidant activity and a process for the preparation thereof
    Patent number: 4046765
    Abstract: This invention relates to novel condensation products of aldehydes and tri- or tetramethyl-1,2-dihydroquinolines of antioxidant activity, as well as to a process for the preparation of such products. The novel compounds are nontoxic, exert their activity both in living organisms and in inanimate objects, and can be used in the chemical and food industry, as well as for therapeutical purposes.
    Type: Grant
    Filed: January 2, 1975
    Date of Patent: September 6, 1977
    Assignee: Material Ksz.
    Inventors: Vilmos Bar, Jeno Mercz, Janos Szvoboda, Zsuszanna B. Pollak, Jakab Matyas
  • Dihydroquinoline derivatives of antioxidant activity
    Patent number: 4025631
    Abstract: This invention relates to novel condensation products of aldehydes and tri- or tetramethyl-1,2-dihydroquinolines of antioxidant activity, as well as to a process for the preparation of such products. The novel compounds are nontoxic, exert their activity both in living organisms and in inanimate objects, and can be used in the chemical and food industry, as well as for therapeutic purposes.
    Type: Grant
    Filed: January 2, 1975
    Date of Patent: May 24, 1977
    Assignee: Material Ksz.
    Inventors: Vilmos Bar, Jeno Mercz, Janos Szvoboda, Zsuszanna B. Pollak, Jakab Matyas