Patents by Inventor Franz M. Bollenrath

Franz M. Bollenrath 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).

  • Stirring system and method for introducing gases to liquids
    Patent number: 4699740
    Abstract: A stirring system for dispersing gases in liquids, includes an upright mixing vessel with at least one baffle, a draft tube, and a stirring shaft with at least two stirrers, one of which stirrers is mounted at the upper end of the draft tube and the other at the lower end. The liquid into which the gases are to be introduced is charged into the mixing vessel to the extent that the liquid level lies above the upper edge of the draft tube and above the lower edge of the baffle or baffles.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: October 13, 1987
    Assignee: Huls Aktiengesellschaft
    Inventor: Franz M. Bollenrath