Patents by Inventor Jacques P. R. Schoennahl

Jacques P. R. Schoennahl 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).

  • Refractory materials consisting of grains bonded by a binding phase based on aluminum nitride containing boron nitride and/or graphite particles and process for their production
    Patent number: 5286685
    Abstract: The invention relates to refractory materials which comprise:(A) grains of at least one refractory material whose melting point and thermal decomposition temperature are higher than 1700.degree. C.;(B) a binding matrix which binds these grains together and predominantly consists of aluminum nitride AlN of hexagonal structure and/or of at least one of the polytypes of AlN; and(C) hexagonal boron nitride particles and/or crystalline graphite flakes dispersed in the binding matrix.Applications in iron and steel metallurgy, in particular as plates in a slide closure device.
    Type: Grant
    Filed: December 7, 1992
    Date of Patent: February 15, 1994
    Assignee: Savoie Refractaires
    Inventors: Jacques P. R. Schoennahl, Michel Dussaulx
  • Refractory parts for devices for regulation or interruption of a jet of steel, made of refractory material
    Patent number: 5215947
    Abstract: The invention relates to a refractory part for a device for regulation or interruption of a jet of steel, characterized in that it is formed from a refractory material essentially consisting ofa) 61 to 77% by weight of grains having an alumina content of more than 50% by weight and a melting point higher than 1800.degree. C., andb) 39 to 23% by weight of a binding phase having a X-ray diagram in which the most intense lines are the lines characteristic of a sialon of the formula Si.sub.6-z Al.sub.z N.sub.8-z where z ranges from 2.5 to 4.Application in particular as plate in a slide closing device.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: June 1, 1993
    Assignee: Savoie Refractaires
    Inventors: Jacques P. R. Schoennahl, Daniel Kuster
  • Refractory materials formed from refractory grains bonded by a sialon matrix containing dispersed graphite and/or boron nitride particles and a process for the preparation of these materials
    Patent number: 5212123
    Abstract: The invention relates to refractory materials having high resistance to corrosion, high mechanical strength at elevated temperature and high resistance to thermal shock, comprising:(A) grains of at least one refractory material whose melting point or, where appropriate, thermal decomposition temperature is higher than 1700.degree. C., these particles being dispersed in(B) a binding matrix consisting predominantly of a sialon of formula Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, where z ranges from 0.5 to 4, as determined from an X-ray diffraction pattern, wherein said refractory materials also comprise:(C) particles of hexagonal boron nitride and/or crystalline graphite dispersed in the binding matrix.Use in iron and steel metallurgy, in particular as slide closing plates, immersed nozzles, etc.
    Type: Grant
    Filed: October 8, 1991
    Date of Patent: May 18, 1993
    Assignee: Savoie Refractaires
    Inventor: Jacques P. R. Schoennahl