Patents by Inventor Herbert Armbrust

Herbert Armbrust 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).

  • Disazo dyes
    Patent number: 4521216
    Abstract: Compounds of the general formula I ##STR1## where R is hydroxyl or unsubstituted or substituted amino, R.sup.1 is hydrogen or C.sub.1 -C.sub.12 -alkyl, X.sup.1 and Y.sup.1 independently of one another are each a carboxylic acid ester or ether group and X.sup.2 and Y.sup.2 independently of one another are each hydrogen, nitro or chlorine, are very useful for coloring petroleum products, solvents and engine fuel additives.
    Type: Grant
    Filed: March 23, 1983
    Date of Patent: June 4, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Armbrust, Johannes P. Dix, Guenter Hansen, Georg Zeidler
  • Preparation of .alpha.-cyanocinnamaldehydes
    Patent number: 4172090
    Abstract: Benzaldehydes are reacted with cyanoacetaldehyde, for which reaction the cyanoacetaldehyde can be produced from isoxazole in a basic medium. The reaction gives .alpha.-cyanocinnamaldehydes, the hydrogenation of which gives the corresponding dihydrocinnamyl compounds, which can be converted to 2,4-diaminopyrimidines by reaction with guanidine, using various methods.
    Type: Grant
    Filed: May 12, 1977
    Date of Patent: October 23, 1979
    Assignee: BASF Aktiengesellschaft
    Inventor: Herbert Armbrust
  • Production of anthraquinone
    Patent number: 4151182
    Abstract: The invention relates to a process for the production of anthraquinone by catalytic oxidation of indans or diphenylmethane derivatives with oxygen in the presence of a vanadium (V) compound with or without one or more than one compund of potassium, boron, thallium, antimony and/or caesium. Anthraquinone which can be prepared by the process according to this invention is a valuable starting material for the production of dyes and pesticides.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: April 24, 1979
    Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft
    Inventors: Heinz Engelbach, Hermann Wistuba, Michael J. Sprague, Hans-Juergen Sturm, Herbert Armbrust