Patents by Inventor Jean-Luc Narcy

Jean-Luc Narcy 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).

  • Non-entry method of underground excavation in weak or water bearing grounds
    Patent number: 5380127
    Abstract: A method of excavating an underground area liable to flooding or collapsing during excavation, wherein the area is susceptible to disaggregation by high pressure water jet and is located above rock of strength suitable for drifting a gallery comprises drifting a gallery in the rock beneath the area, freezing at least a perimeter of the area to form a frozen perimeter, and excavating material from within the frozen perimeter using a high pressure water jet and one or more boreholes between the gallery and the area. Preferably the whole area is frozen for excavation.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: January 10, 1995
    Assignees: Cigar Lake Mining Corporation, Cogema
    Inventors: Clovis Caleix, Jean-Luc Narcy