Patents by Inventor William L. Lennemann

William L. Lennemann 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: 4428700
    Abstract: A method is described for the confinement and isolation of waste materials, especially those that are toxic or otherwise hazardous such as radioactive wastes. The waste material, either contained or uncontained, is emplaced in a underground or surface excavation and encased with backfill or barrier material formed of molten modified sulfur cement or modified sulfur concrete that then cools into a hard, durable, corrosion resistant mass.
    Type: Grant
    Filed: August 3, 1981
    Date of Patent: January 31, 1984
    Assignee: E. R. Johnson Associates, Inc.
    Inventor: William L. Lennemann