Patents by Inventor Robert L. Mannfeld

Robert L. Mannfeld 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 removing substantially all water from an alcohol-containing solution for use as a motor fuel or motor fuel additive
    Patent number: 4308106
    Abstract: A process and still for removing substantially all water from an alcohol-containing solution. The solution is distilled in a rectification column under reduced pressure of about 40 mm Hg or less, and the distillate later collected and condensed having a water content of about 2% by volume or less. Heating for distilling the original solution and cooling for condensing the distilled alcohol vapors are supplied to the system by an external, closed-loop heat pump.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: December 29, 1981
    Inventor: Robert L. Mannfeld