Patents Examined by J. L. Barr
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Patent number: 4374049Abstract: Zinc oxide varistors having high resistance and exponent values are fabricated from a composition consisting essentially of the oxides of zinc, tin, bismuth, antimony, manganese, nickel, cobalt and boron. The composition does not contain barium oxide or silicon dioxide and still retains long term stability properties.Type: GrantFiled: June 6, 1980Date of Patent: February 15, 1983Assignee: General Electric CompanyInventors: Howard F. Ellis, Herbert Fishman
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Patent number: 4374041Abstract: A reagent composition particularly adapted for use in treating organic samples suspected of containing chemically-bound heavy metals preparatory to electrically detecting and measuring the heavy metal content of the samples. The composition includes an electrolyte vehicle which is essentially free of the heavy metal being detected and measured, a measured quantity of at least one metal ion-containing reagent dissolved therein, said metal ion (1) being adapted to displace the heavy metal from its organic chemical bonding and (2) remaining in electrolytic solution at the electrolytic deposition potentials of the heavy metals being detected and measured, a dispersing agent, and a hydrogen ion source for adjusting the pH of said composition to pH about 1.Type: GrantFiled: April 24, 1978Date of Patent: February 15, 1983Assignee: Environmental Sciences Associates, Inc.Inventor: Wayne R. Matson
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Patent number: 4372873Abstract: The corrosion of iron and steel surfaces by an aqueous alkanolamine conditioning solution used to remove CO.sub.2 from a gas stream is effectively inhibited by a combination of a vanadium containing ion and a di- or triamine. A surprising fact is that some of the amine co-inhibitors have been identified by others in the art as promoting ferrous metal corrosion.Type: GrantFiled: March 16, 1981Date of Patent: February 8, 1983Assignee: Texaco Inc.Inventor: Edward C. Y. Nieh
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Patent number: 4373013Abstract: By pouring a solution containing hydrolyzable tin and antimony salts into an aqueous dispersion of titanium oxide particles and mixing, the salts are caused to hydrolyze, whereby a uniform and strongly adherent coating layer of antimony-containing tin oxide is formed on the surface of each particle of the titanium oxide. The coated powder thus obtained is non-hygroscopic and non-toxic and exhibits stable electroconductivity. Furthermore, since it can possess excellent whiteness, it is suitable for forming the electroconductive layers of electro-thermosensitive papers and electrostatic recording papers, for use as the antistatic agent of resins, and for other uses.Type: GrantFiled: September 12, 1980Date of Patent: February 8, 1983Assignee: Mitsubishi Kinzoku Kabushiki KaishaInventor: Motohiko Yoshizumi
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Patent number: 4371589Abstract: An article of improved wear characteristics and composed of a relatively low wear resistant base metal coated by a particulate refractory metal having a melting point of at least 1490.degree. C. deposited within the near-surface region thereof comprising a base metal or alloy of relatively low wear resistance, a refractory metal deposited within said near-surface region, said refractory metal being selectively deposited in the form of discrete particles, and the particles being idiomorphic or blocky or equiaxial or spheroidal or acicular or dendritic and a plurality of these particles having dimensions of less than 10 micrometers, a plurality of the particles being contiguous to form clusters of the particles that are spaced from each other. The clusters of particles may form microscopic regions of refractory metal which in turn may produce macroscopic regions of refractory metal having the appearance of a continuous coating.Type: GrantFiled: April 20, 1979Date of Patent: February 1, 1983Assignee: Warner London Inc.Inventors: Joshua B. Warner, James S. Wolf
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Patent number: 4371459Abstract: Screen-printable conductor composition comprising (a) a conductive phase containing silver and base metal powders dispersed in a solution of (b) a multipolymer prepared by copolymerization of vinyl acetate, vinyl chloride, and an ethylenically unsaturated dicarboxylic acid and a linear aromatic polyester resin dissolved in (c) volatile nonhydrocarbon solvent.Type: GrantFiled: December 17, 1981Date of Patent: February 1, 1983Assignee: E. I. Du Pont de Nemours and CompanyInventor: Nicholas Nazarenko
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Patent number: 4370255Abstract: What is disclosed are novel compositions of matter which are alkali siliconate silylalkylphosphonates which are capable of stabilizing water soluble silicates and which are capable of inhibiting corrosion of metals in aqueous systems.Type: GrantFiled: March 18, 1981Date of Patent: January 25, 1983Assignee: Dow Corning CorporationInventor: Edwin P. Plueddemann
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Patent number: 4367168Abstract: The method of manufacturing, composition and product described herein utilize highly electrically resistive carbon black alone or with low resistivity carbon black to form a self-limiting electrically resistive semi-conductor which presents a positive temperature co-efficient of resistance, the methods which are described providing significantly shortened anneal times, manufacturing ease and reliability.Type: GrantFiled: December 12, 1980Date of Patent: January 4, 1983Assignee: E-B Industries, Inc.Inventor: Cornelius J. N. Kelly
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Patent number: 4362656Abstract: Resistor composition comprising an admixture of finely divided particles of (a) ruthenium-based conductive material, (b) inorganic binder and (c) a manganese vanadate compound.Type: GrantFiled: July 24, 1981Date of Patent: December 7, 1982Assignee: E. I. Du Pont de Nemours and CompanyInventor: Jacob Hormadaly
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Patent number: 4360444Abstract: A getter body for use in encapsulated electrical components is of the type consisting of a powder mixture which has been compressed into tablet form. The powder mixture contains in addition to traditional getter material such as activated carbon, zeolite or the like, aluminum stearate and a binder containing a synthetic such as a polyamide. The getter body is produced in several sequential steps. The getter material is mixed with a polycarbonate or a water glass solution, which is then dried and then pulverized. To this first powder is added the aluminum stearate and the binder containing a synthetic. The resulting powder may then be dried and is then pressed into tablets. The tablets may then be heat-cured and are then surfaced polished. The resulting tablets have good abrasion resistance without a noticeable loss in the getter effectiveness.Type: GrantFiled: March 2, 1981Date of Patent: November 23, 1982Assignee: Siemens AktiengesellschaftInventors: Robert Esterl, Josef Weiser
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Patent number: 4359391Abstract: In a method of treating a subterranean formation, a well treatment composition comprising a dispersion of a water-in-oil emulsion in an aqueous medium is injected into the formation. The water-in-oil emulsion has an internal aqueous phase and an external phase containing a liquid hydrocarbon and a surfactant soluble in the hydrocarbon. The compositions can be designed to perform various well treatment applications including hydraulic fracturing and acidizing and can also be used to encapsulate or to transport well treatment materials and chemicals into the wellbore or formation. Treatment methods may also employ dispersions of a reactive simple or multiple emulsion. The distinct phases of the compositions may be selected to form treatment solutions upon mixing. Thus, improved acidizing may be achieved through an in situ reaction format.Type: GrantFiled: October 9, 1979Date of Patent: November 16, 1982Assignees: Exxon Production Research Co., Exxon Research and Engineering Co.Inventors: William M. Salathiel, Thomas W. Muecke, Claude E. Cooke, Jr., Norman N. Li
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Patent number: 4359411Abstract: An electrically conductive polymeric composition is fabricated by dispers polymeric ether complexes of TCNQ salts within a flexible, thermoplastic polymer matrix. The compositions form flexible, homogeneous, films which exhibit substantially superior properties over currently available TCNQ salt based systems.Type: GrantFiled: October 3, 1980Date of Patent: November 16, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Oh-Kil Kim, Robert B. Fox
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Patent number: 4357266Abstract: The invention provides a novel composition capable of giving an electrically conductive, flexible shaped body having stability in the applied voltage vs. current performance. The composition comprises an electrically insulating polymeric material having flexibility such as a diorganopolysiloxane, a finely divided particulate or fibrous metallic silicon such as a finely powdered semiconductor grade high purity metallic silicon dispersed in the insulating polymeric material as the matrix and an organosilicon compound having at least one functional group directly bonded to the silicon atom or at least one peroxy linkage directly bonded to the silicon atom in a molecule.Type: GrantFiled: January 23, 1981Date of Patent: November 2, 1982Assignee: Shin-Etsu Polymer Co., Ltd.Inventors: Ryoichi Sado, Kenichi Okada
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Patent number: 4357256Abstract: A bleaching composition comprises sodium hydrosulfite, hexamethylenetetramine and a water soluble sulfite such as sodium sulfite or ammonium sulfite, or further a polyphosphate such as a pyrophosphate or a tripolyphosphate and is used in bleaching pulp with a good bleaching effect with no substantial hydrogen sulfide generation.Type: GrantFiled: March 7, 1980Date of Patent: November 2, 1982Assignee: Mitsubishi Gas Chemical Company, Inc.Inventor: Takaaki Yamaguchi
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Patent number: 4357261Abstract: From a refinery's intermediate byproduct composed of a sulfide, oxide or arsenide containing copper and arsenic, a liquid extract containing copper and arsenic at a concentration ratio of not less than 1.0 is obtained. The liquid extract is cooled to a predetermined temperature to achieve solid-liquid phase separation, and the liquid resulting from the phase separation is neutralized to pH 6-7 to isolate copper and arsenic in the form of a composite precipitate. The composite copper-arsenic compound mixture thus obtained has a high purity and low production cost and can be converted through a simple treatment into an effective antiseptic for wood.Type: GrantFiled: July 8, 1980Date of Patent: November 2, 1982Assignee: Sumitomo Metal Mining Company LimitedInventors: Nobuo Takahashi, Hirao Toda
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Patent number: 4356366Abstract: An improved method of manufacturing electrical and electronic circuits is provided wherein an improved conductive ink is employed to define the pathways of current flow. This improved conductive ink is comprised of conductive particles, thermosetting binder and a multifunctional isocyanate. The isocyanate provides cross-linking between the conductive ink binder and the surface upon which the ink is applied and establishes a bond with enhanced moisture durability.Type: GrantFiled: June 5, 1980Date of Patent: October 26, 1982Assignee: Rogers CorporationInventors: William P. Harper, Michael J. Taylor
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Patent number: 4356110Abstract: Secondary stabilizer for vinyl chloride polymers consisting of a solid mixture obtained by melting together pentaerythritol and at least one of the compounds selected from the group consisting of dipentaerythritol, tripentaerythritol, trimethylol propane, neopentyl glycol, trimethylol ethane, anhydroennea heptitol, sorbitol, mannitol, bisphenol A and other organic hydroxy compounds containing at least two hydroxy groups. The stabilizer is characterized in that the mixture has the form of a dispersion of very fine-grained particles in a suitable liquid grinding agent, which dispersion has been obtained by wet grinding said mixture in said grinding agent.Type: GrantFiled: October 30, 1978Date of Patent: October 26, 1982Assignee: Perstorp ABInventors: Bengt A. L. Sallmen, Carl-Axel E. Sjogreen, Mans O. Mansson, Keith F. R. Ogemark
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Patent number: 4356505Abstract: An electric conductive adhesive system includes a hydroxy terminated ether or ester thereof which serves as a conductivity enhancer. Conductivity levels attained exceed those of prior art systems.Type: GrantFiled: November 5, 1979Date of Patent: October 26, 1982Assignee: Bell Telephone Laboratories, IncorporatedInventors: Andrew J. Lovinger, Louis H. Sharpe
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Patent number: 4354964Abstract: An electrically conducting cermet comprises a sintered compact of refractory oxide granules such as alumina granules having diameters of from 50 to 800 microns and a conductive network extending through the cermet and provided by a layer of one or more of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron, cobalt or nickel surrounding the individual oxide granules and constituting a volume fraction of 0.04 to 0.2 of the total cermet, wherein particles of one or more of said metals are dispersed within the oxide granules in a volume fraction of 0.01 to 0.15 of the granules, which granules also contain 0.01 to 0.25 percent by weight of magnesium oxide.Type: GrantFiled: November 10, 1980Date of Patent: October 19, 1982Assignee: Thorn Emi LimitedInventors: Peter Hing, Ronald Kay
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Patent number: 4353816Abstract: The power conductive coating is made of a combination in a liquid condition of 70-85 weight percent of copper powder, 15-30 weight percent of at least one selected from the group of phenol resin, epoxy resin, polyester resin and xylene resin, and a predetermined amount preferably 0.23-1.6 weight percent of at least one selected from the group of anthracene or the inducer thereof, anthranylic acid and anthrazine.Type: GrantFiled: January 19, 1981Date of Patent: October 12, 1982Assignee: Asahi Chemical Research Laboratory Co., Ltd.Inventor: Yamahiro Iwasa