Patents by Inventor John W. Pearson

John W. Pearson 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).

  • Process for forming aggregate; and product
    Patent number: 5500044
    Abstract: A process for forming an ash aggregate is provided. The process involves mixing a cellulose sludge material with an ash component. The ash component may comprise fly ash or sanitary waste ash in combination with fly ash. The sludge component preferably comprises paper mill sludge or pulp mill sludge. The hard lightweight aggregate may be utilized in a variety of manners, for example, to provide lightweight concrete and lightweight concrete mixes.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: March 19, 1996
    Assignee: Greengrove Corporation
    Inventors: William D. Meade, John W. Pearson