Patents by Inventor Wilhelm Brunkhorst

Wilhelm Brunkhorst 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).

  • Manufacture of a solution of nitrosylsulfuric acid in sulfuric acid
    Patent number: 4128623
    Abstract: Solutions of nitrosylsulfuric acid in sulfuric acid are manufactured by reacting nitric acid with sulfur in sulfuric acid or oleum. Less than 0.33 gram atom of sulfur is employed per mole of nitric acid, and after completion of the reaction the free nitric acid still present in the nitrosylsulfuric acid solution is reduced with lactones.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: December 5, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl Schmeidl, Wilhelm Brunkhorst, Eberhard Michaelis