Patents Examined by Michael L. Lewis
  • Processing of titaniferous materials
    Patent number: 4297131
    Abstract: An improved method of extracting titanium from titaniferous materials by reaction with thionyl chloride to form titanium tetrachloride which is separated from the reaction products by volatilization or by extraction.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: October 27, 1981
    Assignee: Engelhard Minerals & Chemicals Corporation
    Inventors: John G. Miller, Thomas C. Schwab
  • Copper and nitrogen containing austenitic stainless steel and fastener
    Patent number: 4295769
    Abstract: A low cost austenitic stainless steel having a high work hardening rate and good ductility if drastically cold reduced, consisting essentially of, in weight percent, 0.05% maximum carbon, 1.5% to 3.0% manganese, about 0.06% maximum phosphorus, about 0.035% maximum sulfur, about 1% maximum silicon, about 15% to about 20% chromium, 3% to 4.7% nickel, 1.75% to 3% copper, 0.10% to 0.30% nitrogen, up to about 0.3% columbium, titanium, tantalum or mixtures thereof, and balance essentially iron. The steel has particular utility in fabrication of cold headed fasteners.
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: October 20, 1981
    Assignee: Armco Inc.
    Inventors: Joseph A. Douthett, Ronald H. Espy
  • Processes of iron segregation
    Patent number: 4295878
    Abstract: Beneficiation of ilmenite using a process comprising first reducing by a known process the iron component thereof to metallic iron to form particles containing a mixture of iron and titanium oxide and then treating these particles with an iron salt or a precursor thereof, at an elevated temperature, to segregate the iron from the titanium-bearing component. The segregated iron is separated from the titanium bearing component by physical or chemical means.
    Type: Grant
    Filed: October 10, 1979
    Date of Patent: October 20, 1981
    Assignee: ICI Australia Limited
    Inventor: Donald J. Fensom
  • Silicon-nitride and metal composite
    Patent number: 4293619
    Abstract: A composite and a method for bonding the composite. The composite includes a ceramic portion of silicon nitride, a refractory metal portion and a layer of MoSi.sub.2 indirectly bonding the composite together. The method includes contacting the layer of MoSi.sub.2 with a surface of the silicon nitride and with a surface of the metal; heating the layer to a temperature below 1400.degree. C.; and, simultaneously with the heating, compressing the layer such that the contacting is with a pressure of at least 30 MPa. This composite overcomes useful life problems in the fabrication of parts for a helical expander for use in power generation.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: October 6, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Richard L. Landingham, Sarah A. Huffsmith
  • Diffusion coating composition of improved flowability
    Patent number: 4293338
    Abstract: Improved powder-type diffusion-coating compositions for use in codeposition processes involving the formation of diffusion coating of chromium and aluminum on high nickel and high cobalt alloys known as superalloys. The compositions are characterized by easy flowability and, particularly, by the use of the intermetallic compound Co.sub.2 Al.sub.9.
    Type: Grant
    Filed: July 26, 1979
    Date of Patent: October 6, 1981
    Assignee: Walbar Metals, Inc.
    Inventors: Bernard R. Rose, John K. Willis
  • Porous metal sheet laminate
    Patent number: 4292376
    Abstract: A sheet laminate is utilised in the manufacture of a combustion chamber for a gas turbine engine. The laminate has passages therethrough, which connect with ambient atmosphere via holes. The arrangement creates local relatively thick portions or lands which cause stress concentrations along the passages and lines of holes. Therefore pockets are machined in the rear face of each land, so as to reduce the differences in thickness of the laminate and thereby ensure the more even distribution of stresses.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: September 29, 1981
    Assignee: Rolls-Royce Limited
    Inventor: David Hustler
  • Diffusion coating combinations
    Patent number: 4292208
    Abstract: Diffusion coating a substrate metal with a different metal, such as aluminum and zinc, that is then chemically removed from the coated substrate, provides the residual metal with a very desirable catalytic surface. At least about a third of the removable metal can be dissolved out. Platinum wire screens activated in this way make effective exhaust catalysts for automotive engines. Chromium-rich coating for protective purposes can be applied on a superalloy, diffusion coating in a pack that in addition to the chromium to be diffused, also contains at least about 3% Ni.sub.3 Al. Also the formation of alpha-chromium is reduced when the pack diffusion is carried out in a retort effectively not over five inches in height. Pack aluminizing in the presence of chromium makes a very effective aluminum- and chromium-containing top coating over platinum plated or platinum coated nickel-base superalloys.
    Type: Grant
    Filed: January 3, 1979
    Date of Patent: September 29, 1981
    Assignee: Alloy Surfaces Company, Inc.
    Inventors: Alfonso L. Baldi, Victor V. Damiano
  • Gold colored laminated composite material having magnetic properties
    Patent number: 4292377
    Abstract: A novel laminated composite material of gold-colored appearance especially suited for, but not limited to, coinage applications has a ferromagnetic core located between sheathing layers of a Cu-Al or Cu-Ni-Al alloy and separated therefrom by layers of copper. Alternative methods involving hot and/or cold rolling techniques are provided for the production of the novel laminates.
    Type: Grant
    Filed: January 25, 1980
    Date of Patent: September 29, 1981
    Assignee: The International Nickel Co., Inc.
    Inventors: Walter A. Petersen, Jonathan A. Travis, Frank A. Badia
  • Bimetallic strip for low temperature use
    Patent number: 4291105
    Abstract: There is provided a class of mechanically pre-stressed structures, suitably bi-layer strips comprising a layer of group 5 transition metals in intimate contact with a layer of an intermetallic compound of said transition metals with certain group 3A, 4A or 5A metals or metalloids suitably gallium, indium, silicon, germanium, tin, arsenic or antimony. The changes of Young's modulus of these bi-layered combinations at temperatures in the region of but somewhat above absolute zero provides a useful means of sensing temperature changes. Such bi-metallic strips may be used as control strips in thermostats, in direct dial reading instruments, or the like.
    Type: Grant
    Filed: August 7, 1979
    Date of Patent: September 22, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Jean F. Bussiere, David O. Welch, Masaki Suenaga
  • Metallic glass powders from glassy alloys
    Patent number: 4290808
    Abstract: Metallic glass powder is prepared by heating a solid metallic glass body to a temperature below its glass transition temperature for time sufficient to effect embrittlement, followed by comminution of the embrittled metallic glass body.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: September 22, 1981
    Assignee: Allied Chemical Corporation
    Inventor: Ranjan Ray
  • Brazed corrosion resistant lined equipment
    Patent number: 4291104
    Abstract: An improved brazed construction and method for fabrication of equipment having a corrosion resistant liner on a base metal backing is disclosed, and involves incorporating symmetrical convolutions in the liner normal to the direction of maximum thermal expansion.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: September 22, 1981
    Assignee: Fansteel Inc.
    Inventor: Hibbard G. Keifert
  • Process for beneficiating sulfide ores
    Patent number: 4289529
    Abstract: In a process for beneficiating one or more mineral values of sulfide ores by treating the sulfide ore with a metal containing compound under conditions such as to selectively enhance the magnetic susceptibility of the mineral values to the exclusion of the gangue in order to permit a separation between the values and gangue, the improvement comprising pretreating the sulfide ore by heating it to a temperature of at least about 80.degree. C. for at least about 0.1 hours.
    Type: Grant
    Filed: December 11, 1979
    Date of Patent: September 15, 1981
    Assignee: Hazen Research, Inc.
    Inventors: James K. Kindig, Ronald L. Turner
  • Process for beneficiating sulfide ores
    Patent number: 4289528
    Abstract: One or more mineral values of sulfide ores are beneficiated by cotreating the sulfide ore with a metal containing compound and a reducing gas under conditions such as to selectively enhance the magnetic susceptibility of the mineral values to the exclusion of the gangue in order to permit a physical separation between the values and gangue.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: September 15, 1981
    Assignee: Hazen Research, Inc.
    Inventors: James K. Kindig, Ronald L. Turner
  • Dense dry etched multi-level metallurgy with non-overlapped vias
    Patent number: 4289834
    Abstract: A double level metal interconnection structure and process for making same are disclosed, wherein an etch-stop layer is formed on the first metal layer to prevent over-etching thereof when forming the second level metal line in a via hole in an insulating layer thereover, by means of reactive plasma etching. The etch-stop layer is composed of chromium and the reactive plasma etching is carried out with a halocarbon gas.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: September 15, 1981
    Assignee: IBM Corporation
    Inventors: George E. Alcorn, Raymond W. Hamaker, Geoffrey B. Stephens
  • Process for controlling powder size with optical energy
    Patent number: 4289952
    Abstract: Metal or ceramic powders having a narrow size distribution are produced by passing a gas entrained powder through an intense light beam which couples preferentially with the larger particles to heat and selectively vaporize a portion of the larger particles until their diameter approximates the desired size.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: September 15, 1981
    Assignee: Massachusetts Institute of Technology
    Inventor: John S. Haggerty
  • Process for producing agglomerates of metal containing ores and the product of the process
    Patent number: 4288245
    Abstract: A process is provided for the agglomeration or pelletizing of metallic ores in the presence of water with a binder containing an alkali metal salt of carboxymethyl cellulose in an amount of at least 0.01%, calculated on the weight of the dry ore material, in combination with one or more salts derived from an alkali metal and a low-molecular weak acid having a pK value higher than 3 and a molecular weight lower than 500 in an amount of at least 2%, calculated on the weight of the alkali metal salt of carboxymethyl cellulose.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: September 8, 1981
    Assignee: Akzo NV
    Inventors: Herm J. Roorda, Max J. Jipping
  • Arrangement of a steel-making plant for capturing and conducting away flue gases
    Patent number: 4286776
    Abstract: In an arrangement for capturing and conducting away flue gases forming during charging of, and pouring off from, metallurgical vessels in a steel-making plant, the material to be charged and poured off is brought into and out of the operating position by a container displaceable by means of a crane. The crane trolley is designed to form a displaceable unit with a hood having a draft opening. The hood, in the operating position, covers the container and the mouth of the metallurgical vessel, and the draft opening borders on the discharge opening of a chimney so as to form a flow connection therewith.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: September 1, 1981
    Assignee: Voest-Alpine Aktiengesellschaft
    Inventor: Friedrich Laimer
  • Composition for iron powder compact infiltrant
    Patent number: 4286987
    Abstract: An infiltrant product composition is disclosed for impregnating an iron powder compact. The infiltrant alleviates typical problems associated with use of infiltrating materials, including partial dissolution of iron base matrix by the infiltrant with consequent severe erosion, oxidizing or reducing effects of furnace atmospheres on infiltrant yield, and incompatible characteristics of infiltrant with the iron base matrix. The preferred infiltrant composition is by weight about 98.25% copper alloy and 1.75% carbonyl type iron powder. An additional 0.05% of aluminum to reduce residual formation and minimize residual adherence and 0.5% of a conventional lubricant based on the copper-iron mixture are added. The infiltrant is in a dry, compactible form.
    Type: Grant
    Filed: November 28, 1979
    Date of Patent: September 1, 1981
    Assignee: United States Bronze Powders, Inc.
    Inventor: Paul E. Matthews
  • Phosphate and ester coating method
    Patent number: 4285223
    Abstract: A stock material for producing seamless containers from a black plate base includes applying a layer of insoluble crystalline phosphate to each surface of the black plate and subsequently producing a thin film of organic lubricating material on the exposed surfaces of the phosphate layers so that a drawn and ironed container can be produced from a flat blank without the use of any additional lubricants during fabrication. The weight of the phosphate layer for each surface of the black plate base is preferably less than 100 milligrams per square foot, while the weight of lubricating film is on the order of 70 to 360 milligrams per square foot. In the preferred embodiment, the phosphate layer is preferably in the range of 20 to 35 milligrams per square foot, and the lubricant layer is on the order of 70 to 180 milligrams per square foot.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: August 25, 1981
    Inventors: Narayan Das, Surya K. Misra
  • Rare earth metal-cobalt permanent magnet alloy
    Patent number: 4284440
    Abstract: A permanent magnet alloy made by adding one or more of Si, Ti, Zr, V, Nb, Cr, and Mo to a known permanent magnet alloy containing rare earth metals, Co, Fe, and Cu. By adding such additives, the amount of substitution of copper required for full precipitation hardening is reduced in the alloy of the present invention for the improvement in magnetic characteristics and thermal stability.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: August 18, 1981
    Assignee: Hitachi Metals, Ltd.
    Inventors: Masaaki Tokunaga, Chitoshi Hagi, Hirokazu Murayama