Patents by Inventor Herbert Rauhut

Herbert Rauhut 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).

  • Patent number: 3944423
    Abstract: Diazotype material includes a light-sensitive diazonium compound of the general formula ##SPC1##Wherein:R.sub.1 and R.sub.2 are substituted or unsubstituted alkyl, aralkyl, or cycloalkyl groups, or form, with the nitrogen atom, a heterocyclic radical, which may be substituted;R.sub.3 is hydrogen or the group OR.sub.6 ;R.sub.4 and R.sub.5 are hydrogen, halogen, alkyl, or OR.sub.6 groups;R.sub.6 is alkyl; or fluorinated alkyl, alkenyl, cycloalkyl, or cycloalkenyl; andX is the anion of the diazonium compound;At least one of the radicals R.sub.4 and R.sub.5 is hydrogen; and at least one of the radicals R.sub.3, R.sub.4, and R.sub.5 is one of said fluorinated radicals, at least one of said fluorinated radicals being further substituted by other halogen atoms, hydroxy groups, acyloxy groups, alkoxy groups, alkylated or acylated amino groups, or aryl radicals.
    Type: Grant
    Filed: September 2, 1969
    Date of Patent: March 16, 1976
    Assignee: Keuffel & Esser Company
    Inventors: Hans-Dieter Frommeld, Herbert Rauhut