Patents by Inventor Anthony P. Moschetti

Anthony P. Moschetti 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).

  • Silicon nitride based ceramics and method
    Patent number: 4603116
    Abstract: A method of preparing fully dense silicon nitride based ceramic articles comprises the steps of blending a metal oxide component and silicon nitride, wherein a portion of the silicon nitride comprises acicular crystals; comminuting the powder mixture to reduce the aspect ratio of the acicular crystals to an average of less than about 3; pressing the comminuted powder to form a compact; and pressureless sintering the compact to a fully dense ceramic body. Powder mixtures and powder compacts for forming fully dense silicon nitride based ceramic bodies are also disclosed.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: July 29, 1986
    Assignee: GTE Laboratories Incorporated
    Inventors: J. Thomas Smith, Carr Lane W. Quackenbush, Anthony P. Moschetti, Helmut Lingertat
  • Sintered silicon nitride ceramic articles having surface layers of controlled composition
    Patent number: 4400427
    Abstract: Sintered silicon nitride-silica-yttria ceramic articles having silica-rich or yttria-rich casing layers are disclosed. The surface layers are formed by sintering pre-compacted bodies in a powder setter bed to produce unitary sintered bodies having surface layers in which the atom ratio of yttrium to silicon has a smooth gradient from the surface of the article to the interior body of the article.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: August 23, 1983
    Assignee: GTE Laboratories Incorporated
    Inventors: Anthony P. Moschetti, J. Thomas Smith, Carr L. W. Quackenbush, Helmut Lingertat, Vincent W. Nehring
  • Method of producing dense silicon nitride ceramic articles having controlled surface layer composition
    Patent number: 4383958
    Abstract: Dense, composite, polycrystalline ceramic articles comprising silicon nitride, silicon dioxide, and yttrium oxide and having thin surface layers of controlled composition are formed by sintering pre-pressed compacts embedded in setter bed powder mixtures having compositions of silicon nitride, silicon dioxide, and yttrium oxide which differ from that of the pressed compact.Employing the method of this invention, articles are produced which have surface layers in which the minor phase of the article is enriched with either yttrium or silicon.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: May 17, 1983
    Assignee: GTE Laboratories Incorporated
    Inventors: Anthony P. Moschetti, J. Thomas Smith, Carr L. W. Quackenbush, Helmut Lingertat, Vincent W. Nehring