Patents by Inventor Norman I. Paille

Norman I. Paille 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).

  • Method and apparatus for casting coarse grain siliconized silicon carbide parts
    Patent number: 6591892
    Abstract: A method of casting a siliconized silicon carbide part. The method includes providing a pre-casting mix comprised of a silicon carbide powder having a maximum particle size within a range of about 1000 to 2000 microns, and water having a percentage by weight of no more than about 9.5% of the mix. A slurry is formed from the mix and poured into a mold. The water is then removed from the mold within a predetermined period of time to form a solid porous green part. The green part is surrounded with silicon metal, and heated to a predetermined temperature above the melting point of the silicon metal. The silicon metal then siliconizes the green part to form a siliconized silicon carbide part.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: July 15, 2003
    Assignee: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Joseph M. Moore, Norman I. Paille, Jr.
  • Silicon nitride having a high tensile strength
    Patent number: 5759481
    Abstract: A ceramic body comprising at least about 80 w/o silicon nitride and having a mean tensile strength of at least about 800 MPa.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: June 2, 1998
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corp.
    Inventors: Vimal K. Pujari, Dennis M. Tracey, Michael R. Foley, Norman I. Paille, Paul J. Pelletier, Lenny C. Sales, Craig A. Willkens, Russell L. Yeckley
  • Silicon nitride having a high tensile strength
    Patent number: 5571760
    Abstract: A silicon nitride ceramic comprising:a) inclusions no greater than 25 microns in length,b) agglomerates no greater than 20 microns in diameter, andc) a surface finish of less than about 8 microinches, said ceramic having a four-point flexural strength of at least about 900 MPa.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: November 5, 1996
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corporation
    Inventors: Vimal K. Pujari, Dennis M. Tracey, Michael R. Foley, Norman I. Paille, Paul J. Pelletier, Lenny C. Sales, Craig A. Willkens, Russell L. Yeckley
  • Sol-gel alumina shaped bodies
    Patent number: 5035724
    Abstract: A process for producing dry substantially crack-free shaped bodies, such as grinding wheels, from a sol-gel alumina hydrate composition is disclosed. The shaped bodies are formed by either a one or a two step forming process and avoid having to pre-prepare alpha alumina grits. The addition of specific crack-avoiding drying control additives, e.g. whiskers, chopped fibers, agarose gels, and formamide, to the sol-gel alumina hydrate prior to water removal therefrom substantially prevents crack-formation during the water removal operation.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: July 30, 1991
    Assignee: Norton Company
    Inventors: Vimal K. Pukari, Norman I. Paille, Jr., Thomas P. Thibaudeau, Arup K. Khaund