Patents by Inventor Ernst Schutt

Ernst Schutt 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).

  • Stable 3,3'-dichlorobenzidine dihydrochloride suspension
    Patent number: 5417881
    Abstract: By means of a 3,3'-dichlorobenzidine dihydrochloride suspension in hydrochloric acid, comprising the componentsa) 35 to 63.5% by weight of 3,3'-dichlorobenzidine dihydrochloride;b) 11 to 24% by weight of hydrogen chloride;c) and 25 to 55% by weight of-water, in each case relative to the total weight of the suspension (100% by weight) and with the proviso that the components a), b) and c) together make 100% by weight;and whose viscosity is in the range from 80 to 1400 mPa.s,3,3'-dichlorobenzidine dihydrochloride can be stably suspended in hydrochloric acid at high concentration and consequently low water content and at the same time a suspension having low viscosity can be obtained, so that the slurry flows out of containers without problems even after relatively long static storage.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: May 23, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Steidl, Peter Dopfer, Wolfgang Ebertz, Ernst Schutt