Patents by Inventor Carr L. W. Quackenbush

Carr L. W. Quackenbush 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).

  • 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
  • S13N4 Having high temperature strength and method
    Patent number: 4280850
    Abstract: Polycrystalline ceramic bodies of Si.sub.3 N.sub.4 when prepared to obtain an intergranular phase which is substantially crystalline, exhibits significantly improved mechanical strength at elevated temperatures above 1,000.degree. C. up to 1600.degree. C. over bodies having glass-containing intergranular phases.
    Type: Grant
    Filed: June 15, 1978
    Date of Patent: July 28, 1981
    Assignee: GTE Laboratories, Incorporated
    Inventors: J. Thomas Smith, Carr L. W. Quackenbush, F. Joseph Reid
  • Aluminum borophosphate glass compositions
    Patent number: 4127415
    Abstract: Novel glass compositions are provided which are enclosed by the iso-composition lines, 2 and 18 mole percent P.sub.2 O.sub.5, 30 and 70 mole percent Al.sub.2 O.sub.3 and 20 and 60 mole percent B.sub.2 O.sub.3. The compositions can contain the usual oxide modifiers. These composition are characterized by refractive indices between about 1.47 and 1.58, densities between about 2.1 and 2.7 gm/cm.sup.3, thermal expansion coefficients between about 26 .times. 17.sup.-7 /C.degree. and 55 .times. 10.sup.-7 /C.degree., and glass transition points of between about 600 and 820.degree. C.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: November 28, 1978
    Assignee: GTE Laboratories Incorporated
    Inventors: Carr L. W. Quackenbush, Andrew G. Kolbeck, Richard M. Klein