Patents by Inventor Michael S. Berkey

Michael S. Berkey 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).

  • Post-tensioned, below-grade concrete foundation system
    Publication number: 20030233798
    Abstract: A below grade, post-tensioned concrete foundation system for use in the construction of residential dwellings and other structures is described. The foundation includes a post-tensioned concrete floor slab formed on the soil base of a below grade excavation. Concrete foundation walls are formed on the perimeter of the post-tensioned floor slab. The weight of the superstructure of dwelling as well as the weight of foundation itself is distributed across the post-tensioned floor slab, thereby resisting the detrimental effects of expansive soils on the foundation.
    Type: Application
    Filed: November 12, 2002
    Publication date: December 25, 2003
    Inventors: John William Berkey, Michael S. Berkey, Thomas S. Miner, DeAnn Jeppson