Patents by Inventor Hellmut Herrmann

Hellmut Herrmann 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).

  • Thermal decoking of cracking ovens and coolers
    Patent number: 5536390
    Abstract: Thermal decoking of cracking gas coolers which operate with low gas pressure is accomplished by controlling the temperature of a cleaning gas delivered to the cooler. The temperature control is achieved by mixing a cleaning gas, which has been heated in a cracking oven, with a stream of relatively cool cleaning gas upstream of the cooler.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: July 16, 1996
    Assignee: Schmidt'sche Heissdampf GmbH
    Inventor: Hellmut Herrmann