Patents by Inventor Jean P. Drolet

Jean P. Drolet 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).

  • Production of magnesium oxide from magnesium silicates by basic extraction of silica
    Patent number: 4478796
    Abstract: There is provided a process for replacing the magnesium oxide portion of a nature magnesium silicate with sodium oxide thereby to form sodium silicate which comprises melting a natural magnesium silicate and sodium carbonate at a temperature of from 1100.degree. to 1350.degree. C. until a clear melt is obtained, the molar ratio of sodium oxide derived from the sodium carbonate per mole of silica contained in the natural magnesium silicate being from 4:1 to 7:1, quenching and extracting said clear melt with water and separating the insoluble magnesium oxide from the solution containing predominantly sodium silicate and sodium hydroxide.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: October 23, 1984
    Assignee: Societe Nationale de Liamiante
    Inventors: Jean M. Lalancette, Jean P. Drolet
  • Protoenstatite ceramic units and process for their preparation
    Patent number: 4468473
    Abstract: Protoenstatite ceramic units are prepared by compressing units of a mixture of 55 to 80 parts by weight of uncalcined demagnetized asbestos tailings with 22 to 44 parts by weight of a source of silica and from 0 to 17 parts by weight of fluxing agents and firing the units at 1250.degree. to 1500.degree. C.
    Type: Grant
    Filed: August 27, 1982
    Date of Patent: August 28, 1984
    Assignee: Societe Nationale de Liamiante
    Inventors: Jean P. Drolet, Jean P. Chevalier