Patents by Inventor Francois Baudequin

Francois Baudequin 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).

  • Patent number: 5290529
    Abstract: The black powder to be treated is injected into the bottom portion of a heated dense fluidized bed, said bed having effective depth enabling the carbon the particles of silica to be oxidized into carbon dioxide as the particles go through the dense fluidized bed while being entrained by the fluidization air. The whitened powder is then recovered by filtering the gases leaving said dense fluidized bed. The invention is particularly applicable to the cosmetics industry for producing make-up that uses silica powder.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: March 1, 1994
    Assignee: Electricite De France (Service National)
    Inventor: Francois Baudequin
  • Patent number: 5230880
    Abstract: This is a process and a device making use of a process for forming calcium oxide from pulverulent calcium carbonate, according to which an initial bath of pulverulent calcium oxide is produced in a reactor (1, 31) in the form of a fluidized bed which is heated electrically to a temperature higher than of the order of C., and the said pulverulent calcium carbonate is then introduced continuously into the bath while the temperature of the bath is always kept higher than of the order of C. by electrical heating, to dissociate the said calcium carbonate into calcium oxide and carbon dioxide.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: July 27, 1993
    Assignee: Electricite de France
    Inventor: Francois Baudequin
  • Patent number: 4707350
    Abstract: The invention relates to a process for the decarbonation of minerals, in powdered form, in a fluidized bed. For example, the process applies to the production of quick lime and/or magnesia from lime stone and/or dolomite fines which are not rendered sufficiently valuable at present.The process comprises recycling a portion at least of the carbon dioxide produced to be used as sole fluidizing gas, the fluidized bed being heated to the desired decarbonation temperature by direct heat supply within the fluidized bed by means of electric devices.Production of decarbonated minerals and of CO.sub.2.
    Type: Grant
    Filed: September 24, 1985
    Date of Patent: November 17, 1987
    Assignee: Electricite de France - Service National
    Inventors: Francois Baudequin, Patrick Leclere