Patents by Inventor Karl-Erich Ott

Karl-Erich Ott 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 extracting phenols from aqueous solutions
    Patent number: 4626605
    Abstract: The invention relates to a process for extracting phenols from aqueous solutions. The extractant used is a salt of an aliphatic amine, having a total carbon number of at least 10, and a strong acid.
    Type: Grant
    Filed: October 2, 1985
    Date of Patent: December 2, 1986
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bernhard Wojtech, Manfred Mayer, Karl-Erich Ott
  • Stirrer for stirring near a vessel wall
    Patent number: 4552461
    Abstract: In this stirrer, the stirrer arms (3, 3a) are arranged radially on the drive shaft (2) and are provided with plates (4, 4a). On these plates, stirring elements (5, 6) are arranged at a distance and inclined relative to one another, in such a way that their shadow areas overlap in the direction of revolution or at least are almost contiguous.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: November 12, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Karl-Erich Ott, Thomas Behrens