Patents by Inventor Wolter Prins

Wolter Prins 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 and apparatus for thermal treatment of non-gaseous material
    Patent number: 6274095
    Abstract: The present invention provides a method for the thermal treatment of material in a rotating conical chamber (4) placed in a housing (1). According to the invention material, brought into the rotating chamber (4) and ejected due to the conical shape, is returned to the chamber (4) for further thermal treatment, without leaving the housing (1). By applying the method of the invention, the thermal efficiency is increased. In addition, wear of the means required for returning material that is to be treated again into the housing (1), is avoided. The invention also relates to two installations for putting the method into practice.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: August 14, 2001
    Assignee: Biomass Technology Group B.V.
    Inventors: Bertus Michiel Wagenaar, Wolter Prins, Willibrordus Petrus Maria Van Swaaij, Arthur Maurits Christiaan Janse