Patents Represented by Attorney, Agent or Law Firm Carla Mattix
  • Micro-encapsulated crack resistant cement
    Patent number: 6565644
    Abstract: A cement mixture is provided for preventing or reducing the formation of micro-cracks during hydration. The cement mixture includes both a conventional cement and a cement micro-encapsulated in a time-release polymer coating. The micro-encapsulated cement does not hydrate until a few hours to a few days after the bulk of the conventional cement has hydrated, thereby allowing for autogenous healing of small cracks.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: May 20, 2003
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: William F. Kepler, Kurt F. von Fay