Patents by Inventor Esko Ilmari Torkkeli

Esko Ilmari Torkkeli 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 of treating waste sludge
    Patent number: 5972058
    Abstract: The invention relates to a waste sludge treatment process in which a solid additive is mixed into sludge to produce solid products. The solid additive includes aggregate-like hydrophobic grains of peat.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: October 26, 1999
    Inventor: Esko Ilmari Torkkeli