Patents by Inventor Gunter Hanisch

Gunter Hanisch 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 and apparatus for cleaning styrene-polluted spent air
    Patent number: 4734111
    Abstract: A process for cleaning in particular styrene-polluted spent air by filtering out styrene and an apparatus for performing this process are described. The filter used is a biofilter of tree bark, particularly spruce bark. The filter is in the form of a bed of particles with a particle diameter of 0.5 to 3 cm. The process is particularly inexpensive compared with the relevant prior art cleaning process working with the physical absorption of the styrene on active carbon filters.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: March 29, 1988
    Inventors: Rainer Hoffmann, Gunter Hanisch