Patents by Inventor Lajos Voroshazy

Lajos Voroshazy 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).

  • Process for the preparation of N-aryl-N'-(mono- or di substituted)-urea derivatives
    Patent number: 4410697
    Abstract: The invention relates to a new method for the preparation of N-aryl-N'-(mono- or disubstituted)-urea derivatives having the general formula (I), ##STR1## wherein Aryl is an optionally substituted phenyl group, andR.sup.1 and R.sup.2 each stand for an optionally substituted alkyl, cycloalkyl, alkoxy or phenyl group, orR.sup.1 and R.sup.2 may form, together with the adjacent nitrogen atom, a nitrogen-containing heterocyclic group which may contain a further hetero atom, orone of R.sup.1 and R.sup.2 may also stand for hydrogen,with the proviso that if one of R.sup.1 and R.sup.2 is an optionally substituted phenyl group, the other may represent only hydrogen atom or an optionally substituted alkyl or alkoxy group,by reacting a carbamate of the general formula (II) with an amine of the general formula (III),R.sup.1 R.sup.2 N--CO--X (II)Aryl--NH.sub.2 (III)or a carbamate of the general formula (IV) with an amine of the general formula (V),Aryl--NH--CO--X (IV)R.sup.1 R.sup.2 NH (V)wherein R.sup.1, R.sup.
    Type: Grant
    Filed: August 28, 1981
    Date of Patent: October 18, 1983
    Assignee: Reanal Finomvegyszergyar
    Inventors: Sandor Torok, Lajos Voroshazy, Peter Galambos, Ivan Daroczi, Zoltan Ormenyi