Patents by Inventor Marcel Cheyrezy

Marcel Cheyrezy 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).

  • Concrete comprising organic fibres dispersed in a cement matrix, concrete cement matrix and premixes
    Patent number: 6723162
    Abstract: A concrete includes organic fibers, dispersed in a cement matrix. The cement matrix includes elements having predetermined particle sizes. The organic fibers have predetermined lengths and diameters. The behavior of the concrete is improved both with respect to the occurrence of minute cracks and the propagation of large cracks as a result of a synergistic effect between the cement matrix and the organic fibers.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: April 20, 2004
    Assignees: Bouygues, Lafarge, Rhodia Chimie
    Inventors: Marcel Cheyrezy, Jerome Dugat, Sandra Boivin, Gilles Orange, Laurent Froin
  • Metal fibre concrete, cementitious matrix and pre-mixes for preparing matrix and concrete
    Patent number: 6478867
    Abstract: The invention concerns a concrete obtained by mixing with water, cement, granular elements, elements with puzzolanic reaction, constituents capable of improving the toughness of the matrix, metal fibers and at least a dispersing agent, in specified conditions and proportions. Said concrete has improved properties compared to prior art concrete comprising metal fibers.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: November 12, 2002
    Assignees: Bouygues Travaux Publics, Lafarge, Rhodia Chimie
    Inventors: Marcel Cheyrezy, Jérôme Dugat, Bernard Clavaud, Gilles Orange, Laurent Frouin