Patents by Inventor Joel Demit

Joel Demit 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: 4331772
    Abstract: A method of manufacturing nitrided silicon parts by sintering a silicon powder containing aluminium under an atmosphere rich in nitrogen. A small quantity of carbon monoxide is added to the nitrogen atmosphere and the nitrogen and carbon monoxide partial pressures and the aluminium content of the silicon powder are chosen so that the oxidation reaction by the carbon monoxide on the nitrided silicon formed in the surfaces layers of the parts maintains therein an open porosity which is sufficient to allow the nitrogen to penetrate to the cores of the parts until the parts are homogeneously nitrided. Application to the manufacture of parts which must retain good mechanical strength at high temperature.
    Type: Grant
    Filed: October 17, 1980
    Date of Patent: May 25, 1982
    Assignee: Association pour la Recherche
    Inventors: Jean-Paul Torre, Joel Demit
  • Patent number: 4147759
    Abstract: Method of manufacturing silicon nitrides with a general formula of Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, in which z is a number less than or equal to 2.8. Silicon nitride is made to react at a temperature higher than C. and in the finely divided state on aluminium oxynitride, and in the presence of an agent which generates gaseous silicon monoxide. Application to the manufacture of hard materials of high resistance to oxidation and to creep at high temperature.
    Type: Grant
    Filed: September 27, 1977
    Date of Patent: April 3, 1979
    Assignee: Ceraver
    Inventor: Joel Demit