Patents by Inventor Lawrence H. McCurrich

Lawrence H. McCurrich 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).

  • Pumpable cementitious compositions
    Patent number: 4131480
    Abstract: The invention concerns a pumpable cementitious composition containing porous light weight aggregate. The composition is rendered pumpable by the addition of a dispersing agent and a gelling agent in sufficient amount to reduce the absorption of water by the aggregate when the composition is pumped. In particular, the dispersing agent is a sulphonated melamine or naphthalene formaldehyde or a sulphonated polystyrene, and the gelling agent is a water soluble cellulose derivative such as methyl cellulose, the two agents each comprising 0.001% to 0.04% by weight of the composition.
    Type: Grant
    Filed: March 16, 1977
    Date of Patent: December 26, 1978
    Assignee: Fosroc Holdings (U.K.) Limited
    Inventors: Lawrence H. McCurrich, Steven A. Lammiman