Patents by Inventor Hans Nesvadba

Hans Nesvadba 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).

  • Polyhalo alkyl or alkenyl alcohol esters of piperazino acids
    Patent number: 4112091
    Abstract: Inhibiting methanogenesis by adding polyhaloalkyl or alkenyl alcohol esters of piperazino acids of the formula ##STR1## wherein X and Z are oxygen or sulphur.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: September 5, 1978
    Assignee: Sandoz Ltd.
    Inventors: Hans Nesvadba, Hellmuth Reinshagen
  • Imidazolyl-2-quinazoline derivatives
    Patent number: 4055642
    Abstract: Basically substituted imidazolyl-2-quinazolines of the formula ##STR1## where R.sub.1 is hydrogen, lower alkyl or halogen;R.sub.2 is lower alkyl, lower alkenyl or lower hydroxalkyl; andR.sub.3 is a basic organic substituent,Are useful as anti-parasitic agents and as mycoplasma growth inhibiting agents.
    Type: Grant
    Filed: May 5, 1976
    Date of Patent: October 25, 1977
    Assignee: Sandoz Ltd.
    Inventors: Hans Nesvadba, Hellmuth Reinshagen
  • Haloalkyl esters of 5-nitroimidazole-1-carboxylic acid derivatives
    Patent number: 4020166
    Abstract: This invention provides compounds of the formula, ##STR1## in which R.sub.1 signifies straight or branched chain alkyl in which a single methyl group is replaced by a mono-, di- or tri-halomethyl group; R.sub.2 signifies hydrogen or straight or branched chain lower alkyl and X and Z each independently signifies oxygen or sulphur, which are useful as animal feed additives and amoebicidal agents.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: April 26, 1977
    Assignee: Sandoz, Ltd.
    Inventors: Hans Nesvadba, Hellmuth Reinshagen