Patents by Inventor Claude Dumazeau

Claude Dumazeau 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).

  • Gas impermeable coating for a refractory article
    Patent number: 5094692
    Abstract: Coating impermeable to air at the operating temperatures applied on a piece of refractory material for the continuous casting of steel so as to reduce the aspiration of air due to the permeability of the refractory. This coating is preferably comprised of viscous phases at the operating temperature of the piece of refractory material.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: March 10, 1992
    Assignee: Vesuvius Crucible Company
    Inventor: Claude Dumazeau
  • Stopper rod with an improved gas distribution
    Patent number: 5071043
    Abstract: The stopper rod for regulating the flow of a liquid has a body traversed by an axial channel and having at one end a porous nose fed with gas from the channel. The nose has a free space in the form of a hemisphere-shaped slot or lattice network communicating with the channel for delivery of gas thereto. Preferably, a plurality of spaced-apart bridges of solid material connect the two faces of the free space in order to increase the strength of the porous nose.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: December 10, 1991
    Assignee: Vesuvius Crucible Company
    Inventors: Claude Dumazeau, Pascal Dubois