Patents Examined by Josephine Lloyd
  • Thermionic emitter of lanthanum strontium vanadates
    Patent number: 3944866
    Abstract: A thermionic emitter for apparatus such as electron microscopes, scanning electron microscopes, and high power vacuum tubes which require a source of electrons formed from lanthanum strontium vanadate which is prepared from the compounds La.sub.(1.sub.-x) Sr.sub.(x) VO.sub.3, where x is the fraction of strontium (Sr) incorporated into LaVO.sub.3. The value of x lies between 0.1 and 0.4.
    Type: Grant
    Filed: April 8, 1974
    Date of Patent: March 16, 1976
    Assignee: Canadian Patents & Development Ltd.
    Inventor: Michael Sayer
  • Use of an iron/silicon/phosphorus-alloy in separation of minerals
    Patent number: 3943061
    Abstract: The invention provides the use of an iron/silicon/phosphorus-alloy containing between 8 and 25 weight % of silicon and between 0.3 and 2.5 weight % of phosphorus as heavy medium for making heavy pulps for the heavy media separation of minerals.
    Type: Grant
    Filed: May 4, 1973
    Date of Patent: March 9, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Johann Cziska, George Strauss, Wilhelm Portz, Klaus Komorniczyk, Joachim Kandler
  • Conductor compositions comprising nickel borides
    Patent number: 3943168
    Abstract: Disclosed herein are powder compositions useful for making conductors, e.g., microcircuit conductors, end terminations for capacitors, electrodes for gas discharge display devices, etc. The compositions comprise inorganic powders dispersed in an inert vehicle and are printed and fired in the conventional manner on dielectric substrates. The inorganic powders comprise certain nickel compounds (borides or boride-silicides). Glass powder, nickel metal powder, and/or nickel silicide may also be present.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: March 9, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Frank Knowles Patterson
  • Aqueous quenching medium containing salts of polymeric materials
    Patent number: 3939016
    Abstract: A novel quenching medium for steel is provided. The quenching medium is a 0.5-10 wt. % aqueous solution of polyacrylic acid, polymethacrylic acid, a copolymer of acrylic acid and methacrylic acid, or a salt thereof. Intrinsic viscosity [.eta.] of the polymer is from 0.010 to 0.050 l/g. The quenching medium is superior in various quenching characteristics to conventional quenching media.
    Type: Grant
    Filed: October 2, 1973
    Date of Patent: February 17, 1976
    Assignee: Toho Chemical Industry Co., Ltd.
    Inventors: Takashi Tokuue, Takashi Kato
  • Semiconductive glass-ceramic articles
    Patent number: 3936397
    Abstract: This invention relates to the formation of semiconductive glass-ceramic articles. More particularly, the present invention relates to the formation of semiconductive glass-ceramic articles in the CdO--Bi.sub.2 O.sub.3 --B.sub.2 O.sub.3 --GeO.sub.2 compositional field having resistivities of less than about 10.sup.9 ohm-cm.
    Type: Grant
    Filed: February 1, 1974
    Date of Patent: February 3, 1976
    Assignee: Owens-Illinois, Inc.
    Inventor: James E. Rapp
  • Intergranular insulation type polycrystalline ceramic semiconductive composition
    Patent number: 3933668
    Abstract: An intergranular insulation type semiconductive ceramic composition comprising a major proportion of strontium titanate (SrTiO.sub.3), a minor amount of niobium oxide (Nb.sub.2 O.sub.5) or tantalum oxide (Ta.sub.2 O.sub.5), a minor amount of either germanium oxide (GeO.sub.2) or zinc oxide (ZnO) and having diffused therein either bismuth oxide (Bi.sub.2 O.sub.3) or a mixture of bismuth oxide, lead oxide (PbO) and boric oxide (B.sub.2 O.sub.3). The material is especially useful as a capacitor.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: January 20, 1976
    Assignees: Sony Corporation, Taiyo Yuden Co., Ltd.
    Inventors: Yasunori Takahashi, Nobutatsu Yamaoka, Yoshifumi Yamaoka, Shuichi Kakubari