Patents Examined by E. Suzanne Parr
  • Graphite-base filling material for the decomposition of alkali metal amalgams and method of producing same
    Patent number: 4042656
    Abstract: A graphite-base filling material for the decomposition of alkali metal amalgams, said material containing titanium carbide and incorporating the ingredients in an amount between 69 and 35 wt % for the graphite and between 31 and 65 wt % for the titanium carbide.The method of producing the material disclosed consists in that a carbon filler, a carbon-containing binding agent and titanium or titanium carbide or titanium oxide are intermixed. The titanium or said titanium compounds is used in an amount between 24.8 and 52 wt %, the titanium carbide or titanium oxide being taken in terms of titanium. The mixture obtained is moulded and the blanks moulded are fired at a temperature between 500.degree. and 1200.degree. C. Next, the blanks fired are graphitized at a temperature between 1700.degree. and 1800.degree. C.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: August 16, 1977
    Inventors: Vladimir Petrovich Chviruk, Nina Vasilievna Koneva, Alexandr Afanasievich Kilkinov, Alexandr Viktorovich Demin, Nikolai Nikolaevich Shipkov, Konstantin Alexeevich Kosinsky, Georgy Mikirtychevich Kamarian, Ernest Elizarovich Nemirovsky, Igor Nikolaevich Samokhin
  • Electroconductive polysalt complexes
    Patent number: 4040984
    Abstract: Cationic, electrically conductive polymers are mixed with multifunctional anionic compounds and/or anionic polymers to form a polysalt complex which exhibits markedly improved properties. Specifically, solvent holdout to parafinic solvents and to toluene are considerably improved, and the tackiness of the resulting film is notably decreased. The polysalt products also exhibit very good filmability on plastic substrates whereas the cationic polymer alone normally forms very poor films on such substrates.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: August 9, 1977
    Assignee: Calgon Corporation
    Inventors: Andrew Jackson Sharpe, Jr., Robert H. Windhager, Kathleen Seese Hearp
  • Cermet varistors
    Patent number: 4041436
    Abstract: The cermet varistors have electrodes applied to an improved varistor composition which includes a semi-conductive material having zinc oxide in admixture with at least one metal oxide selected from the group consisting of chromium oxide, cobalt oxide and manganese oxide and includes a glass matrix. The glass matrix is a borosilicate glass with at least one metal oxide selected from the group consisting of cobalt oxide and manganese oxide. The improved compositions are used in varistors of both the thick film and bulk types, the resulting varistors having enhanced device characteristics, particularly high exponents of nonlinearity.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: August 9, 1977
    Assignee: Allen-Bradley Company
    Inventors: Allan Kouchich, George W. Taylor
  • Synthesized gellants containing smectite-type clay and process for producing same
    Patent number: 4040974
    Abstract: This invention provides a gellant which is a synthesized complex of a fluorine-containing trioctahedral smectite-type clay and an amorphous occluded phase selected from the group consisting of lithium hydroxide, sodium hydroxide, magnesium hydroxide, lithium oxide, sodium oxide, magnesium oxide, and mixtures thereof, the gellant having mole ratios of Li, Na, Mg and Si, expressed as oxides, and F of:aLi.sub.2 O:bNa.sub.2 O:cMgO:dF:8SiO.sub.2 (I)where 0.25.ltoreq.a<1.1, 0.ltoreq.b<0.60, 4.75<c<5.85, 0.5<d.ltoreq.3.5, 0.60.ltoreq.a+b<1.25, and 6.0 <a+b+c<6.65.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: August 9, 1977
    Assignee: N L Industries, Inc.
    Inventors: Alan C. Wright, Joseph Paul Rupert
  • Photoconductive films
    Patent number: 4040985
    Abstract: A photoconductive film comprises a first region containing Se in which Te and an element capable of forming deep levels in Se are added at concentrations lower than 10 atomic % inclusive on average, respectively, a second region disposed on the first region and containing Se in which Te is added with a continuous distribution of concentration having a peak value greater than 15 atomic % inclusive, a third region disposed on the second region and containing Se in which an element capable of forming deep levels in Se is added with a continuous distribution of concentration having a peak value greater than 15 atomic % inclusive, and a fourth region disposed on the third region and containing Se in which Te and an element capable of forming deep levels in Se are added at concentrations lower than 10 atomic % inclusive on average, respectively.
    Type: Grant
    Filed: April 6, 1976
    Date of Patent: August 9, 1977
    Assignees: Hitachi, Ltd., Nippon Hoso Kyokai
    Inventors: Keiichi Shidara, Naohiro Goto, Eiichi Maruyama, Tadaaki Hirai, Tsutomu Fujita
  • Fluorinated carbon composition and resistor utilizing same
    Patent number: 4036786
    Abstract: A partially fluorinated acetylene black composition, represented by the empirical formula CF.sub.x wherein x has a value of from 0.01 to 0.04, is employed as the conductive component in a composite material resistor to form a high resistance value resistor having excellent temperature coefficient of resistivity, voltage sensitivity and Quantech current noise characteristics.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: July 19, 1977
    Assignee: Globe-Union Inc.
    Inventor: William H. Tiedemann
  • Method of synthesis of metal chromites
    Patent number: 4035266
    Abstract: A method of synthesizing metal chromites comprising melting metal oxides including chromium oxide in an equimolar ratio. The oxides are melted under the action of a high-frequency electric field with the addition to the metal oxides of an electrically conductive material having an electric resistivity of no more than 10 Ohm.cm at 20.degree. C and in an amount of at least 0.05% by weight.
    Type: Grant
    Filed: December 3, 1974
    Date of Patent: July 12, 1977
    Inventors: Vladimir Ilich Alexandrov, Vladimir Grigorievich Gordon, Ernest Nikolaevich Muraviev, Vyacheslav Vasilievich Osiko, Alexandr Mikhailovich Prokhorov, Eduard Georgievich Spiridonov, Vladimir Mikhailovich Tatarintsev
  • Method for increasing the conductivity of electrically resistive organic materials
    Patent number: 4033905
    Abstract: Electrically resistive organic materials, e.g. silicone rubber, thermoplastic resins, and liquid crystals, are made more electrically conductive by the addition of an effective amount of a compound of the formula: ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, alkyl, and phenyl-substituted alkyl; R.sub.2 is alkyl with 8 - 20 carbon atoms; and Z is selected from the group consisting of phenyl and alkyl-substituted phenyl. The invention is particularly applicable to silicone rubber light valves and liquid crystals.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: July 5, 1977
    Assignee: RCA Corporation
    Inventors: Allen Bloom, Daniel Louis Ross
  • Method of enhancing the electron yield during photoionization of a sensibilizer
    Patent number: 4032477
    Abstract: An enhanced electron yield is obtained during irradiation of a sensibilizer with light in the presence of water when a hydrophobic organic material is present as a separate phase having an electron repelling surface in contact with the water and containing the sensibilizer.
    Type: Grant
    Filed: March 18, 1976
    Date of Patent: June 28, 1977
    Assignee: Hahn-Meitner-Institut fur Kernforschung Berlin GmbH
    Inventor: Michael Gratzel
  • Method for preparing a photoconductive powder
    Patent number: 4029604
    Abstract: This invention provides a method for preparing a photoconductive powder comprising firing a combined starting mixture of CdSe, ZnS, ZnO, a Cu or Ag salt, and a Cd or Zn chloride or bromide as a flux, and preferably a Mn salt also, at a temperature higher than the melting point of the flux, cooling the fired product, and re-firing the cooled product in a sulfur vapor containing atmosphere. The photoconductive powder obtained by this method has high photosensitivity, high threshold voltage and fine particle size.
    Type: Grant
    Filed: August 27, 1975
    Date of Patent: June 14, 1977
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshio Enoki, Nobumasa Ohshima
  • Metallizing compositions
    Patent number: 4029605
    Abstract: Metallizing compositions suitable for the production of fired on electrically conductive films which do not adversely affect the overall strength of heat resistant substrates are described. The compositions comprise, in specified proportions, at least one finely divided electrically conductive metal, certain alkali metal, crystallizable, high silica glass frits as binder, inert liquid vehicle and, if desired, inert filler and/or pigment. The compositions are particularly suited to glass substrates and provide therewith composite structures having greater strength than that of the glass substrate.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: June 14, 1977
    Assignee: Hercules Incorporated
    Inventor: Raymond Stanley Kosiorek
  • Pressure-sensitive elastic resistor compositions
    Patent number: 4028276
    Abstract: Pressure-sensitive compositions adaptable for use as elastic resistors over a wide pressure range, useful as keyboard switches or vehicle-crash sensors, comprising hard, metallic-conductive particles insulatively distributed in elastomer.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: June 7, 1977
    Assignee: E. I. Du Pont de Nemours & Company
    Inventors: John Charles Harden, Sebastian V. R. Mastrangelo
  • Voltage-dependent resistor
    Patent number: 4028277
    Abstract: A voltage-dependent resistor comprising a sintered body consisting essentially of ZnO, as a main constituent, and, as additives, bismuth oxide (Bi.sub.2 O.sub.3), titanium oxide (TiO.sub.2) and one or two members selected from the group consisting of aluminum fluoride (AlF.sub.3), chromium fluoride (CrF.sub.3), nickel fluoride (NiF.sub.2) and strontium oxide (SrO) with electrodes applied to the opposite surfaces of the sintered body. This voltage-dependent resistor has a low C-value, a high n-value and a high power dissipation for surge energy and high stability to a high D.C. load. Other additives such as cobalt oxide (CoO), manganese oxide (MnO), barium oxide (BaO), boron oxide (B.sub.2 O.sub.3), chromium oxide (Cr.sub.2 O.sub.3), nickel oxide (NiO) and germanium oxide (GeO.sub.2) improve the voltage nonlinear property of the sintered body.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: June 7, 1977
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mikio Matsuura, Nobuji Nishi, Michio Matsuoka, Takeshi Masuyama
  • Deuterium separation by infrared-induced addition reaction
    Patent number: 4025408
    Abstract: A method for deuterium enrichment by the infrared-induced addition reaction of a deuterium halide with an unsaturated aliphatic compound. A gaseous mixture of a hydrogen halide feedstock and an unsaturated aliphatic compound, particularly an olefin, is irradiated to selectively vibrationally excite the deuterium halide contained therein. The excited deuterium halide preferentially reacts with the unsaturated aliphatic compound to produce a deuterated addition product which is removed from the reaction mixture.
    Type: Grant
    Filed: May 28, 1976
    Date of Patent: May 24, 1977
    Assignee: The United States of America as represented by the United States Energy Research and Development Administration
    Inventor: John B. Marling
  • Recovery of transplutonium elements from nuclear reactor waste
    Patent number: 4025602
    Abstract: A method of separating actinide values from nitric acid waste solutions resulting from reprocessing of irradiated nuclear fuels comprises oxalate precipitation of the major portion of actinide and lanthanide values to provide a trivalent fraction suitable for subsequent actinide/lanthanide partition, exchange of actinide and lanthanide values in the supernate onto a suitable cation exchange resin to provide an intermediate-lived raffinate waste stream substantially free of actinides, and elution of the actinide values from the exchange resin. The eluate is then used to dissolve the trivalent oxalate fraction prior to actinide/lanthanide partition or may be combined with the reprocessing waste stream and recycled.
    Type: Grant
    Filed: May 25, 1976
    Date of Patent: May 24, 1977
    Assignee: The United States of America as represented by The United States Energy Research and Development Administration
    Inventors: David O. Campbell, Samuel R. Buxton
  • Polysiloxane-polyoxyalkylene block copolymers
    Patent number: 4025456
    Abstract: Polyoxyalkylene polyether admixtures and polysiloxane-polyoxyalkylene block copolymers, a solventless process for producing said copolymers using said admixtures, a process for producing flexible polyether polyurethane foam using said copolymers as foam stabilizers and the foam produced thereby.
    Type: Grant
    Filed: July 1, 1976
    Date of Patent: May 24, 1977
    Assignee: Union Carbide Corporation
    Inventors: Carl James Litteral, David Lee Mullins
  • Semiconducting ceramics containing vanadium oxide
    Patent number: 4022716
    Abstract: Semiconducting ceramics are produced by firing a semiconducting composition of the barium titanate type containing vanadium oxide in the amount of 0.001 to 0.5 wt%. A change in the specific resistance over the range of the temperature at which the positive temperature coefficient characteristic of resistivity (PTCR) is exhibited can be increased by as much as 10.sup.5 times and the specific resistance value at room temperature can be controlled at a desired value. By further adding silicon dioxide to the above composition in the amount of 0.05 to 1.5 wt% the above effects can be enhanced, especially the specific resistance at ambient temperature.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: May 10, 1977
    Assignee: TDK Electronics Company, Limited
    Inventors: Hisayoshi Ueoka, Masatada Yodogawa
  • Method of fabricating polycrystalline selenium imaging devices
    Patent number: 4021375
    Abstract: A photoconductive target for a vidicon-type camera tube, which includes a layer of polycrystalline selenium, is exposed to a diffusion cycle wherein the temperature is gradually increased from an initial baking temperature of about 50.degree. C. to a final baking temperature of about 150.degree. C. at a rate of about 5.degree. C. per minute. Thereafter the target is baked at a temperature of about 100.degree. C. for about 16 hours in oxygen to substantially reduce the dark current of the target.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: May 3, 1977
    Assignee: RCA Corporation
    Inventor: Robert Milton Moore
  • Semi-conductive silicone elastomers
    Patent number: 4020014
    Abstract: Conductive silicone elastomer compositions which cure under hot air vulcanization conditions are provided by formulating a vinylorganopolysiloxane gum, an organohydrogenpolysiloxane fluid, a conductive carbon black filler, a peroxide catalyst which is not normally capable of causing the composition to vulcanize in hot air and a small, effective amount of a catalyst comprising platinum or a platinum compound, in an amount which is less than that which will cause cross-linking in up to 24 hours at about 23.degree. C. but at least an amount sufficient to cause the composition to cure under hot air vulcanization conditions.
    Type: Grant
    Filed: January 21, 1976
    Date of Patent: April 26, 1977
    Assignee: General Electric Company
    Inventors: Alfred Lewis Service, George Christie, Jr.
  • Gelled reagent materials
    Patent number: 4020005
    Abstract: Reagents can be provided in more convenient and readily-utilizable forms by converting the basic desired reagent material into a shapeable solid using gelation techniques (i.e., a non-crystalizing solidification process) for the fluids that are carriers and/or vehicles for the reagent. The resulting solidified gel product can be shaped as desired or needed into such practically useful forms as ribbons, tablets, capsules, pellets, etc. The gelled reagent materials are oftentimes more storeable and have markedly increased shelf-lives over the same reagents, per se, in ungelled form.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: April 26, 1977
    Inventor: John L. Lang