Patents by Inventor Dennis F. Sowa

Dennis F. Sowa 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).

  • Method for conditioning refuse
    Patent number: 5822881
    Abstract: A method and apparatus for treating refuse by non-combustibly shrinking plastics in the refuse. The trash is heated to a temperature of at least 250.degree. to 500.degree. for a minimum period of time. A rotatable chamber heats the refuse and transports the refuse for the minimum period of time. An operator controls the rate of rotation of the chamber and thus the time of heating in accordance with the moisture content of the refuse. A steam/air mixture used as a heat medium serves to kill bacteria in the refuse in addition to shrinking and drying the refuse.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: October 20, 1998
    Inventors: Frank T. Romweber, Dennis F. Sowa
  • Method and apparatus for conditioning refuse
    Patent number: 5613306
    Abstract: A method and apparatus for treating refuse by non-combustibly shrinking polyfoam plastics in the refuse. The trash is heated at a temperature between 250.degree. and 500.degree. for a minimum period of time. A rotatable chamber heats the refuse and transports the refuse for the minimum period of time. An operator controls the rate of rotation of the chamber and thus the time of heating in accordance with the moisture content of the refuse. A steam/air mixture used as a heat medium serves to kill bacteria in the refuse in addition to shrinking. and drying the refuse.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: March 25, 1997
    Assignee: Rapo-Shrink, Inc.
    Inventors: Frank T. Romweber, Dennis F. Sowa
  • Method and apparatus for conditioning refuse
    Patent number: 5412881
    Abstract: A method and apparatus for treating refuse by non-combustibly shrinking polyfoam plastics in the refuse. The trash is heated at a temperature between 250.degree. and 500.degree. for a minimum period of time. A rotatable chamber heats the refuse and transports the refuse for the minimum period of time. An operator controls the rate of rotation of the chamber and thus the time of heating in accordance with the moisture content of the refuse. A steam/air mixture used as a heat medium serves to kill bacteria in the refuse in addition to shrinking and drying the refuse.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: May 9, 1995
    Assignee: RSS, Inc.
    Inventors: Frank T. Romweber, Dennis F. Sowa
  • Method and apparatus for conditioning refuse
    Patent number: 5116363
    Abstract: A method and apparatus for treating refuse by non-combustibly shrinking polyfoam plastics in the refuse. The trash is heated at a temperature between 250.degree. F. and 500.degree. F. for a minimum period of time. A rotatable chamber heats the refuse and transports the refuse for the minimum period of time. An operator controls the rate of rotation of the chamber and thus the time of heating in accordance with the moisture content of the refuse. A steam/air mixture used as a heat medium serves to kill bacteria in the refuse in addition to shrinking and drying the refuse.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: May 26, 1992
    Inventors: Frank T. Romweber, Dennis F. Sowa