Patents by Inventor Michael David Arthur Thomas

Michael David Arthur Thomas 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).

  • Cement composition for alkali-reactive aggregate and for sulphate resistance
    Patent number: 5928420
    Abstract: A combination of a class C fly ash having a high analytical content of CaO, and a silica fume, with a hydraulic cement, such as Portland cement, produces concrete with alkali-silica reactive aggregate having acceptable low expansion such as by ASTM C 1260; and also produces sulphate resistance with mineral aggregates generally.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: July 27, 1999
    Assignee: Lafarge Canada, Inc.
    Inventors: David Bridson Oates, Michael David Arthur Thomas, Philip de Sousa Zacarias, Donald Stephen Hopkins, Kevin Moire Cail