Patents by Inventor Otto J. Wolff

Otto J. Wolff 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).

  • Apparatus for making rods or tubes having a filter
    Patent number: 3947169
    Abstract: Apparatus for producing composite thermoplastic extrusion products comprising first and second extruder barrels communicating with one another so that the output of the first extruder barrel is directed to the input of the second extruder barrel, the output of said second extruder barrel being greater than the output of said first extruder barrel. Motor means and heating means for rotating and heating extruder barrels and hoppers for introduction of plastic materials and fillers is also provided.
    Type: Grant
    Filed: May 13, 1974
    Date of Patent: March 30, 1976
    Assignee: Allied Chemical Corporation
    Inventors: Otto J. Wolff, Harvey Nungesser