Patents by Inventor Robert Engelsman

Robert Engelsman 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).

  • Patent number: 4676960
    Abstract: The solid, liquid and gaseous waste products which arise during the manufature of carbon electrodes are concentrated.First, the solid electrode waste is mixed with the carbon-rich dusts from crushing operations, and with lime or lime and gypsum (from a wet scrubbing operation). By means of grinding and screening the mixture is converted to a suitable range of fine particulate sizes, then fed continuously as adsorbent material through a dry scrubbing unit through which is passed the gaseous waste that also contains fractions of fluid waste. The thus charged adsorbent is combusted together with oily waste in a low temperature fluidized bed boiler. The resultant ash and slag which contain the pollutants as non-hazardous calcium sulfate or calcium fluoride are transported to a dumping site.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: June 30, 1987
    Assignee: Swiss Aluminium Ltd.
    Inventors: Felix Keller, Ary A. Kooijman, Robert Engelsman, Werner K. Fischer