Patents by Inventor Richard C. First

Richard C. First 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).

  • Deep mix soil stabilization method
    Patent number: 6076997
    Abstract: A deep mix soil stabilization system comprises a hydraulic cement grout, and a soil dispersant comprising at least one of i) an acrylic acid polymer or copolymer, or a salt thereof, ii) an acrylic acid/sulfonic acid copolymer, or a salt thereof, iii) an acrylic acid/phosphonic acid copolymer or a salt thereof, and iv) a blend of an acrylic acid polymer with at least one of a sulfonic acid polymer and a phosphonic acid polymer, or a salt thereof.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: June 20, 2000
    Assignee: MBT Holding AG
    Inventors: Richard C. First, Samy M. Shendy, Stephen A. Farrington