Patents by Inventor David B. Jermstad

David B. Jermstad 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: 5336290
    Abstract: The invention relates to a method of recycling contaminated soil so as to form a balanced non-contaminated soil with an increased water-holding capability. More particularly the invention combines two waste products, namely hydrocarbon-affected soil and activated sewage sludge, in order to create a useful non-waste product having high marketability. The combination, or mixing, of those waste products is done either by land farming and/or by composting. In the latter case the hydrocarbon-affected soil also acts as an insulating blanket over the compost, and that blanket itself is subsequently added into the compost after the curative process has dissipated the contaminants.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: August 9, 1994
    Inventor: David B. Jermstad