Patents Examined by Stephen G. Kalinchak
  • Patent number: 5397558
    Abstract: A CVD method for forming a diamond or diamond containing carbon film comprises the step of inputting a reactive gas, supplying energy to the reactive gas, and depositing the carbon film on a substrate. The reactive gas includes a carbon compound material which has a diamond structure in its molecular structure. The representative material is adamantane. Oxygen or hydroxyl group is also added in order to improve the crystallinity of the deposited carbon film.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: March 14, 1995
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Akiharu Miyanaga, Masaya Kadono, Shunpei Yamazaki
  • Patent number: 5395496
    Abstract: A process is disclosed to synthesize fullerenes in a plasma reactor. It comprises introducing various amounts of carbon halides as the plasma forming gas in a plasma torch capable of producing a high enough temperature flame to dissociate the carbon bearing molecules into carbon and halogen atoms, hence forming a carbon cloud which condenses into a soot containing fullerenes. Also hydrocarbons can be introduced in the torch as the plasma forming gas and reacted with carbon halides or halogens injected therewith or directly into the plasma flame at the exit of the torch. Moreover, an inert gas, such as helium, may also be used as the plasma forming gas. The process can use a high enthalpy non-transferred d.c. plasma torch or an induction plasma torch as the plasma generating device.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: March 7, 1995
    Assignee: Pegasus Refractory Materials, Inc.
    Inventors: Peter G. Tsantrizos, Serge Grenier
  • Patent number: 5391323
    Abstract: Carbonaceous materials based on the fullerene molecules have been developed which allow for high conductivity (comparable to or higher than those attained by n-type doped polyacetylene). The fullerene materials are soluble in common solvents.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: February 21, 1995
    Assignee: AT&T Corp.
    Inventors: Robert C. Haddon, Arthur F. Hebard, Donald W. Murphy, Matthew J. Rosseinsky
  • Patent number: 5380516
    Abstract: The present invention relates to a method for synthesizing diamond by chemical vapor deposition (CVD) process, and specifically a chemical deposition process which allows production of diamond of high purity and high crystallizability having various uses at low cost and at high speed. In the first method for the present invention, a mixture of oxygen gas and a carbon-containing compound gas and optionally an inert gas is introduced into a reaction vessel and a plasma is generated by use of an electromagnetic field, thereby producing diamond on a substrate placed in the vessel.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: January 10, 1995
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Keiichiro Tanabe, Takahiro Imai, Naoji Fujimori
  • Patent number: 5372797
    Abstract: A method for forming monotungsten carbide, comprising heating a solid, non-elemental tungsten-containing material in a flowing atmosphere containing molecular hydrogen and molecular methane for a time sufficient to convert substantially all of the tungsten-containing material to monotungsten carbide, The heating brings the temperature of the tungsten-containing material to a first elevated temperature of from about 520 to about 550.degree. C. and, subsequently, at a rate of from about 3 to about 10.degree. C. per minute, the heating brings the temperature from the first elevated temperature to a second elevated temperature of about 800 to about 900.degree. C. Thereafter the temperature is held at the second elevated temperature for at least about 15 minutes. At least about 50 weight percent of the monotungsten carbide formed is formed while holding the temperature at the second elevated temperature.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: December 13, 1994
    Assignee: The Dow Chemical Company
    Inventors: Stephen D. Dunmead, William G. Moore
  • Patent number: 5372798
    Abstract: The invention relates to a composition that is the reaction of a fullerene containing at least one corrannulene ring structure and Y.sub.2 X.sub.2, wherein Y is Se or S, and X is Cl or Br. Generally, these compounds may be represented by the formula C.sup.f.sub.n X.sub.6 Y.sub.2 or more particularly C.sup.f.sub.n X.sub.5 (YYX). In the formula C.sup.f.sub.n more specifically, is a fullerene having at least one corrannulene ring structure. The compositions may be made by reacting fullerenes with Se.sub.2 X.sub.2 or S.sub.2 X.sub.2 wherein X is Cl or Br, preferably in liquid form and preferably heated for a time sufficient to produce the novel compositions. The compositions may be isolated in crystalline form by precipitation with a solvent such as hexane. In crystalline form the compositions may be represented by the generic formula C.sup.f.sub.n X.sub.8 Y.sub.4, or more particularly, C.sup.f.sub.n X.sub.5 (YYX).mY.sub.2 X.sub.2 because in crystalline form the compositions are typically associated with .mY.sub.
    Type: Grant
    Filed: March 8, 1994
    Date of Patent: December 13, 1994
    Assignee: Exxon Research and Engineering Company
    Inventors: Jonathan M. McConnachie, Edward I. Stiefel
  • Patent number: 5372799
    Abstract: Granular diamond suitable for use as an abrasive grain for polishing is synthesized from gaseous phase by a process for the synthesis of granular diamond, comprising subjecting a mixed gas containing an organic compound and hydrogen to a treatment to form plasma and depositing diamond on substrate grains dispersed and fluidized in the resulting plasma space, characterized in that the substrate grains are dispersed and fluidized by the mixed gas fed at a flow rate of at least the terminal velocity of the grains and an AC or DC electric field is applied to a zone whose grain concentration in the space is in the range of 1 to 20% by volume.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: December 13, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Tadafumi Adschiri, Junji Degawa, Takahiro Imai, Naoji Fujimori, Takehiko Furusawa, deceased
  • Patent number: 5370854
    Abstract: Carbothermally reduce a metal oxide to its corresponding metal nitride or metal carbide powder in a vertical gravity flow reactor by adding precursor pellets containing the metal oxide, a thermally decomposed binder material and carbon or a source of carbon directly to a heated reaction zone within the reactor. The pellets form a pellet bed, the top of which must be maintained within the heated reaction zone. The binder material is a blend of wheat and corn starches, optionally in conjunction with another binder such as melamine. The binder material thermally decomposes to a carbonaceous residue which functions both as an additional source of carbon and as a binder for the precursor pellets. The reactor may be modified by adding an internal vent line to remove volatile materials from the heated reaction zone before they have an opportunity to condense on internal reactor surfaces.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: December 6, 1994
    Assignee: The Dow Chemical Company
    Inventors: John P. Henley, Gene A. Cochran, David A. Dunn, Glenn A. Eisman, Alan W. Weimer
  • Patent number: 5370855
    Abstract: A method of forming synthetic hydrogen defect free diamond or diamond like films on a substrate. The method involves providing vapor containing fullerene molecules with or without an inert gas, providing a device to impart energy to the fullerene molecules, fragmenting at least in part some of the fullerene molecules in the vapor or energizing the molecules to incipient fragmentation, ionizing the fullerene molecules, impinging ionized fullerene molecules on the substrate to assist in causing fullerene fragmentation to obtain a thickness of diamond on the substrate.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: December 6, 1994
    Inventor: Dieter M. Gruen
  • Patent number: 5368948
    Abstract: A tag or marker is disclosed which comprises a substrate; an `active` magnetic material which is a soft magnetic material having a high magnetic permeability and a low coercive force; and a deactivating material which is a hard or semi-hard magnetic material having a moderate or high coercive force and a moderate magnetic permeability, whereby the deactivating material, when subjected to a sufficiently high magnetising force, is able to clamp the magnetic properties of the `active` material so as to deactivate the `active` material. The tag or marker is characterised in that the deactivating material is formed by an electrodeposition process, and in that the deactivating layer is nickel.
    Type: Grant
    Filed: April 9, 1993
    Date of Patent: November 29, 1994
    Assignee: Esselte Meto International Produktions
    Inventor: Dafydd G. Davies
  • Patent number: 5368832
    Abstract: Disclosed is a method of making phosphorous acid or hypophosphorous acid by reacting hydrogen chloride with a sodium phosphite or a sodium hypophosphite, respectively, in the presence of water to precipitate sodium chloride crystals and form the acid. The acid is separated from the sodium chloride crystals and can be passed through an anion exchange column that is preferably loaded with phosphite or hypophosphite ions, respectively, to remove residual chloride ions.
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: November 29, 1994
    Assignee: Occidental Chemical Corporation
    Inventors: Harry E. Buckholtz, Mohan S. Saran, Frederick C. Leitert, David A. Flautt
  • Patent number: 5366815
    Abstract: A magnetic multilayer is an alternate stack of a plurality of magnetic thin films containing Fe, Co or Ni and a plurality of Ag thin film. Both the films are formed by molecular beam epitaxy to a thickness of 2 to 60 .ANG.. The multilayer has an axis of easy magnetization in a plane parallel to the surface and an in-plane squareness ratio of 0.5 or lower and exhibits antiferromagnetism. The multilayer shows giant magnetoresistance change in low magnetic fields, for example, a magnetoresistance change of 1 to 40% in a magnetic field of 0.01 to 20 kOe.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: November 22, 1994
    Assignee: TDK Corporation
    Inventors: Satoru Araki, Kiyomi Yasui, Yoshikazu Narumiya
  • Patent number: 5364610
    Abstract: In the process for making calcium carbonate by the double decomposition reaction of sodium carbonate and calcium hydroxide in aqueous reaction medium the improvement of producing calcium carbonate having a scalenohedral particle shape and a rosette aggregate structure comprising adding said sodium carbonate in more than one stream to said calcium hydroxide over a period of 1 to 8 hours and maintaining said reaction medium in the range of 80.degree. to 140.degree. F.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: November 15, 1994
    Assignee: P. H. Glatfelter Company
    Inventor: Charles S. Merris, Jr.
  • Patent number: 5362462
    Abstract: The present invention is an ammonia injection scheme for enhanced NO.sub.x reductions wherein the NO.sub.x containing gas to be treated is upstream of a cyclone separator. The enhanced NO.sub.x reductions is accomplished by injecting the ammonia through the inside wall of the cyclone inlet duct.
    Type: Grant
    Filed: May 26, 1993
    Date of Patent: November 8, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Hoanh N. Pham, Todd A. Shirley
  • Patent number: 5362457
    Abstract: A method for producing an anion intercalated hydrotalcite without first forming hydrotalcite and then having to activate the hydrotalcite prior to substituting anions in the hydrotalcite structure. The method includes reacting an activated magnesia with an aqueous solution of aluminate, anion, such as bromide, chloride, sulfate, borate and combinations thereof and hydroxyl ions. The method can be carried out at atmospheric pressure to form hydrotalcite in high purity and high yield. In a preferred embodiment of the invention, the aluminate solution is formed from sodium aluminate, sodium bromide and sodium hydroxide and the aqueous solution is substantially carbonate free. Other anion intercalated hydrotalcites can also be produced by the method of the present invention.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: November 8, 1994
    Assignee: Aluminum Company of America
    Inventors: Donald K. Grubbs, Peter E. Valente, III
  • Patent number: 5362468
    Abstract: The pyrolysis process for fluid effluents in an enclosure, where they are transformed into solid and gaseous products is characterized in that the said effluents are heated on contact with solid elements, on traversing a pile of said solid elements offering a surface contact per volume unit at least equal to 10 m/m and in that the said solid products are trapped on the surface of said solid elements and are then separated from the latter, so as to be able to regenerate the said solid elements. Continuous or discontinuous pyrolysis apparatus for performing the process according to the invention. Application to the destruction of chlorinated effluents.
    Type: Grant
    Filed: January 14, 1993
    Date of Patent: November 8, 1994
    Assignee: Le Carbone Lorraine
    Inventors: Michel Coulon, Jacques Boucher
  • Patent number: 5356602
    Abstract: Aluminum sulfate that is less colored is prepared by adjusting the concentration of hydrogen peroxide in sulfuric acid to 0.1% by weight or less, and contacting the sulfuric acid with an alumina-containing compound.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: October 18, 1994
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Mitsuo Tanjo, Toshio Ashitani, Tetsuo Fujita, Katsuhiro Sakata, Mikitoshi Nakada
  • Patent number: 5352429
    Abstract: Carbonaceous material embedded within an explosive charge, is subjected to ressure and temperature conditions during detonation of the charge at a supervelocity modified to obtain a compaction pressure profile having a peak pressure that is of substantially constant prolonged duration.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: October 4, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Kibong Kim
  • Patent number: 5348719
    Abstract: A process for producing carbon fibers having high strand strength, which comprises subjecting pitch fibers obtained by melt-spinning pitch, followed by gathering, to infusible treatment to obtain infusible fibers, followed by carbonization treatment, and if necessary, graphitization treatment, to obtain carbon fibers, wherein the infusible fibers or the carbon fibers are heat-treated in an atmosphere containing steam or carbon dioxide at a temperature of from 500.degree. to 1,800.degree. C.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: September 20, 1994
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Iwao Yamamoto, Akihiko Yoshiya, Akira Nakagoshi
  • Patent number: 5345031
    Abstract: The halide content of halogenated aromatic hydrocarbons such as PCBs can be reduced by treatment with a reagent comprising (i) at least one complex of a transition metal of group 4 or 5 with a multidentate or unidentate organic or inorganic ligand and (ii) a reducing agent. The reaction is conducted in the presence of an aliphatic or aromatic amine, optionally in the presence of an inert organic solvent.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: September 6, 1994
    Assignee: The Trustees of Princeton University
    Inventors: Jeffrey Schwartz, Yumin Liu