Patents by Inventor Henning Dorr

Henning Dorr 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 1-amino-1,3,5-triazine-2,4(1H,3H)-diones
    Patent number: 4524205
    Abstract: A process for the preparation of a herbicidally active 1-amino-1,3,5-triazone-2,4 (1H,3H)-dione of the formula ##STR1## comprising in a first stage at a temperature from about 0.degree. to 100.degree. C. reacting an isocyanate of the formulaR.sup.1 - NCO (II)with an isothio semicarbazone of the tautomeric formulas ##STR2## in which R.sup.3 and R.sup.4 each independently is hydrogen, alkyl, cycloalkyl, aralkyl o alkyl, cycloalkyl, aralkyl or aryl,thereby to form a urea derivative of the tautomeric formulas ##STR3## in a second stage at a temperature between about -50.degree. and 0.degree. C. reacting the urea derivative with phosgene (COCl.sub.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: June 18, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Bonse, Reinhard Lantzsch, Henning Dorr, Wolfgang Kreiss, Karlfried Dickore, Klaus Ditgens, Eckart Kranz