Patents by Inventor Louis N. Lambert, III

Louis N. Lambert, III 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: 4913596
    Abstract: An athletic field in which a subgrade is initially formed with a series of ditches having a series of drain tiles therein exteriorly covered with pea gravel. A layer of pea gravel is mounted over the subgrade including the ditches having drain tile covered with pea gravel. A layer of crushed stone is mounted over the layer of pea gravel. A layer of sand having an infiltration rate of at least 9" per hour is mounted over the layer of crushed stone. A layer of soil mixture having an infiltration rate of between 5" to 9" per hour is mounted over the layer of sand. The layer of soil mixture has a layer of soil reinforcement matting spaced from the upper surface thereof within a two-inch upper strata of the soil mixture layer. The upper surface of the layer of soil mixture has thereon either grass sod, grass sprigs, or grass seed for establishing a grass growth thereon.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: April 3, 1990
    Assignee: Erosion Control Systems, Inc.
    Inventor: Louis N. Lambert, III