Patents by Inventor Richard Granville Marshall

Richard Granville Marshall 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).

  • Structural module
    Patent number: 7704011
    Abstract: A sub-base layer for use in construction, comprises a plurality of connected substantially cuboid modules each having spaced-apart, substantially parallel top and bottom walls joined by a peripheral sidewall defining an enclosed volume. The connection between the modules is effected by a plurality of tie members which prevent lateral movement of the modules relative to one another. The layer is particularly useful as a lightweight replacement for aggregate sub-base layers in foundations, roadways, pavement, carparks, and the like.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: April 27, 2010
    Assignee: Permavoid Ltd
    Inventor: Richard Granville Marshall
  • Structural module
    Publication number: 20030188505
    Abstract: A sub-base layer for use in construction, comprises a plurality of connected substantially cuboid modules each having spaced-apart, substantially parallel top and bottom walls joined by a peripheral sidewall defining an enclosed volume. The connection between the modules is effected by a plurality of tie members which prevent lateral movement of the modules relative to one another. The layer is particularly useful as a lightweight replacement for aggregate sub-base layers in foundations, roadways, pavement, carparks, and the like.
    Type: Application
    Filed: February 18, 2003
    Publication date: October 9, 2003
    Inventor: Richard Granville Marshall