Patents Assigned to Rigro Inc.
  • Method for using lightweight concrete for producing a combination therefrom and a combination produced thereby
    Patent number: 5759260
    Abstract: This invention is directed to a lightweight concrete combination. The combination includes a lightweight concrete product having auxiliary structures, such as at least one fastener, embedded therein. The lightweight concrete product comprises (a) cement and (b) a lightweight additive material. The invention also relates to a method for using the lightweight concrete product, and to a method for producing the lightweight concrete combination.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: June 2, 1998
    Assignee: Rigro Inc.
    Inventor: Richard E. Groh