Patents Examined by L. Dewayne Rutledge
  • Patent number: 5300159
    Abstract: A method for manufacturing superplastic forming/diffusion bonding tools and a wide range of other aerospace parts by forming a titanium aluminide interface layer from ion vapor deposition is disclosed.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: April 5, 1994
    Assignee: McDonnell Douglas Corporation
    Inventors: Michael D. Petzoldt, Steven M. Sullivan
  • Patent number: 4956144
    Abstract: An alloy is provided which has good operating strength and ductility at temperatures of 2000.degree. to 2500.degree. F. and density of between 6.5 and 7.0 g/cm.sup.3.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: September 11, 1990
    Assignee: General Electric Company
    Inventors: Melvin R. Jackson, Shyh-Chin Huang
  • Patent number: 4950553
    Abstract: Bath surfaces of a polyimide sheet are coated with a layer of electroless nickel or cobalt which can also include a thin electroless copper layer on the Ni. or Co. This tenaciously bonded coating is subsequently treated in such a way so as to increase its permeability or porosity without substantially altering its resistive properties. The induced porosity allows water and other volatiles trapped in the dielectric polyimide sheet to be removed while the preserved electrical continuity of the metal layer is sufficient to support electrolytic copper plating which services the dual purpose of providing a copper thickness useful for the subsequent production of electronic circuitry and preventing the readsorption of water into the dielectric core by permanently sealing or coating said porous metal layer.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: August 21, 1990
    Assignee: Polyonics Corporation
    Inventors: Daniel P. Walsh, Philip D. Knudsen
  • Patent number: 4944797
    Abstract: A powder material and a process for producing same are disclosed. The process comprises reducing the size of an electrolytically produced starting dendritic copper powder material by fluid energy milling to produce a finer powder, essentially all of which has a particle size of less than about 20 micrometers in diameter, entraining the finer powder in a carrier gas and passing it through a high temperature zone at a temperature above the melting point of the finer powder, the temperature being from about 5500.degree. C. to about 17,000.degree. C., to melt at least about 50% by weight of the finer powder to form essentially fine spherical particles of the melted portion, and rapidly and directly resolidifying the resulting high temperature treated material while the material is in flight, to form fine spherical particles having a particle size of less than about 20 micrometers in diameter.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: July 31, 1990
    Assignee: GTE Products Corporation
    Inventors: Preston B. Kemp, Jr., Walter A. Johnson
  • Patent number: 4933026
    Abstract: A soft magnetic cobalt/iron alloy with high saturation magnetization comprising 0.15%-0.5% tantalum or niobium or tantalum plus niobium, 33-55% cobalt, the balance consisting of iron apart from very minor alloy ingredients and incidental impurities.
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: June 12, 1990
    Inventors: Rees D. Rawlings, Rodney V. Major, Clive M. Orrock
  • Patent number: 4931254
    Abstract: An alloy having high strength at high temperature is provided.
    Type: Grant
    Filed: December 29, 1988
    Date of Patent: June 5, 1990
    Assignee: General Electric Company
    Inventor: Melvin R. Jackson
  • Patent number: 4927712
    Abstract: Tin-based alloys filled with steel shots or/and reinforced with short tin-coated steel fibers were prepared by melting the alloy phase and by mixing filler shots/fibers with the molten alloy in an air atmosphere with the addition of ammonium chloride. The content of steel shots ranges up to about 40 weight % and the fraction of tin-coated steel fibers ranges up to about 30 weight %. New reinforced composite alloys have a higher strength than unreinforced conventional alloys while keeping the melting temperature of new composites in the same range of unreinforced alloys.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: May 22, 1990
    Assignee: Yoon Technology
    Inventors: Yoon O. Lhymn, Chang Lhymn
  • Patent number: 4925501
    Abstract: This invention relates to a method of making large, fully dense compacts of substantially amorphous to very finely crystalline rare earth alloys using explosive compaction and hot working.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: May 15, 1990
    Assignee: General Motors Corporation
    Inventor: Elizabeth F. Harasek
  • Patent number: 4923509
    Abstract: A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of light metal based spherical particles which are essentially free of elliptical shaped material and elongated particles having rounded ends. The process for making the spherical particles involves mechanically reducing the size of a starting material to produce a finer powder which is then entrained in a carrier gas and passed through a high temperature zone above the melting point of the finer powder to melt at least about 50% by weight of the powder and form spherical particles of the melted portion. The powder is directly solidified.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: May 8, 1990
    Assignee: GTE Products Corporation
    Inventors: Preston B. Kemp, Jr., Walter A. Johnson
  • Patent number: 4923532
    Abstract: An aluminum based metal matrix composite is produced from a charge containing a rapidly solidified aluminum alloy and particles of a reinforcing material present in an amount ranging from about 0.1 to 50 percent by volume of the charge. The charge is ball milled energetically to enfold metal matrix material around each of the particles while maintaining the charge in a pulverant state. Upon completion of the ball milling step, the charge is consolidated to provide a powder compact having a formable, substantially void free mass. The mass is then subject to a heat treatment during which it is solutionized at a temperature above the solvus temperature of the alloy, quenched and age hardened at a temperature below the solvus temperature of the alloy to promote precipitation of a primary strengthening Al.sub.3 (Li,Zr) phase and to precipitate substantially all of the Al.sub.3 (Li,Zr) phase into the metal matrix.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: May 8, 1990
    Assignee: Allied-Signal Inc.
    Inventors: Michael S. Zedalis, Paul S. Gilman
  • Patent number: 4923764
    Abstract: An article having a colored surface comprises an article having a working surface and a coating applied on the working surface comprising a cermet composed of alumina and one of chromium and nichrome and exhibiting a black silver color.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: May 8, 1990
    Assignee: Seikosha Co., Ltd
    Inventors: Kouji Hirose, Hitoshi Ito, Kazuhito Yoshida
  • Patent number: 4921025
    Abstract: A process for forming a carburized steel article includes carburizing a steel material containing not more than 0.10% silicon and less than 1.1% chromium to form an austenitic surface matrix having a high density of carbides dispersed therein. After quenching, the carburized steel article is characterized by an outer surface having a high ratio of carbides and is substantially free of intergranular oxides. As a result of preventing undesirable surface oxide formations and simultaneously providing a beneficial surface carbide structure, the bending fatigue strength, wear properties, and contact fatigue strength of articles such as gears, shafts, bearings and couplings are greatly enhanced.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: May 1, 1990
    Assignee: Caterpillar Inc.
    Inventors: Sheryl A. Tipton, Gary D. Keil, Gregory S. Holloway, David R. Gromer, Gary L. Biltgen
  • Patent number: 4920012
    Abstract: Fine-grained and/or equiaxed tungsten and/or rhenium coatings, substantially free from columnar structure, are deposited on substrates (especially graphite) by chemical vapor deposition by directing the flow of reactant gases to the substrate with high velocity and in close proximity thereto, most often at a velocity gradient of at least about 1050 and preferably at least about 2000 cm./cm.-sec. The deposition process is preferably conducted while moving the substrate so as to coat large areas thereof. By this method, tungsten and/or rhenium-coated articles useful as X-ray targets having excellent properties under conditions of rapid temperature cycling may be produced.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: April 24, 1990
    Assignee: General Electric Company
    Inventors: David W. Woodruff, Joan M. Redwing
  • Patent number: 4919886
    Abstract: A titanium alloy comprising about 20 to 30 atomic percent (a/o) aluminum, about 3 to 5 a/o niobium, about 3 to 5 a/o vanadium, and about 3 to 5 a/o molybdenum, balance titanium. The alloy can be dispersion strengthened by the addition of small amounts, i.e. up to about 1 a/o of sulfur or rare earth dispersoids, such as Ce, Er or Y.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: April 24, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Ganapathy Venkataraman, Francis H. Froes
  • Patent number: 4920011
    Abstract: A magnetic field shield including a superconductive film characterized in that the magnetic field shield comprises a superconductive film layer constituted primarily of a mixed crystalline body of niobium nitride and titanium nitride laminated on a metal substrate, that the magnetic field further comprises a nobium-titanium alloy layer or a metal film layer in the above lamination, that the magnetic field comprises a plurality of the above-mentioned layers, and that the magnetic field has a plurality of small holes passing through the layers in the direction of the thickness. The magnetic field shield of the present invention produces an excellent magnetic field shielding effect due to a superconductive characteristic peculiar to the superconductive film layer constituted primarily by a mixed crystalline body of niobium nitride and titanium nitride. The cooling effect of the metal substrate maintains the magnetic field shielding effect at a high level.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: April 24, 1990
    Assignees: Osaka Prefecture, Koatsu Gas Kogyo Co. Ltd.
    Inventors: Souichi Ogawa, Takao Sugioka, Masaru Inoue
  • Patent number: 4917359
    Abstract: An easy method and apparatus to eliminate casting defects from composite materials of hypereutectic Al-Si alloys and improve their properties. The product composite materials with primary silicon crystals of several microns have fine honogeneous microstructures and mechanical properties comparable to similar materials produced by the conventional powder metallurgy technology. Highly wear-resistant composite materials, in which the hypereutectic Al-Si alloy and strengthening material are homogeneously mixed, can be obtained with ease. The hypereutectic Al-Si alloy and strengthening material are homogeneously mixed by stirring blades rotated at low speed. The obtained molten composite alloy rotated at high speed about a horizontal shaft in a heat-resistant vessel. The rotor rotating and stirring at high speed spatters the molten composite alloy material to break up the crystallizing out primary silicon crystals.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: April 17, 1990
    Assignees: Agency of Industrial Science & Technology, Suzuki Motor Co., Ltd.
    Inventors: Kiyoshi Ichikawa, Satoshi Ishizuka, Shinji Yamamoto
  • Patent number: 4917965
    Abstract: A long, linear composite article which is characterized in that a large number of composite filaments are present as spaced from one another in a continuous layer composed of copper, a copper alloy, niobium, tantalum or vanadium, each of said composite filaments having a structure that at least one strand of a linear body is surrounded by an aluminum alloy or niobium, said linear body being composed substantially of extremely fine, filamentary superconducting Nb.sub.3 Al compound having an average diameter of from about 0.03 .mu.m to about 1 .mu.m. The said composite article can be prepared by drawing a composite material composed of (a) an aluminum alloy and (b) niobium, together with copper or a copper alloy once or plural times repeatedly, until the average diameter of the aluminum alloy of (a) becomes about 1 .mu.m or less, and heat-treating the resultant linear composite material.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: April 17, 1990
    Assignee: National Research Institute for Metals
    Inventors: Kiyoshi Inoue, Takao Takeuchi, Yasuo Iijima, Michio Kosuge
  • Patent number: 4917963
    Abstract: Bonding between a metallic conductor and a substrate is improved by using a primer layer having a graded composition which continuously varies from a composition predominant in a metal which bonds well to the substrate at the substrate-primer layer interface to a composition predominant in the metal of the conductor at the conductor-primer layer interface. Specifically, the bonding characteristics of copper to polyimide substrate are improved by using a chromium-copper graded composition primer layer which is chromium-rich at the substrate-primer layer interface and copper-rich at the conductor-primer layer interface.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: April 17, 1990
    Assignee: Andus Corporation
    Inventor: Wilfred C. Kittler
  • Patent number: 4917968
    Abstract: A structure which is resistant to corrosion at high temperatures comprises a ductile layer of a platinum group metal, such as iridium, and a layer of a refractory metal having a high strength at high temperatures, such as rhenium. A solid solution of the two metals is present between and metallurgically bonded to the two metal layers. Further, the structure may include a layer of ceramic such as zirconia or hafnia on the exposed face of the platinum group metal layer.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: April 17, 1990
    Assignee: ULTRAMET
    Inventors: Robert H. Tuffias, John Harding, Richard Kaplan
  • Patent number: 4917861
    Abstract: Dental restorations are made of a palladium alloy which consists essentially of, on a weight basis, 50-85 percent palladium; 5-40 percent of at least one metal selected from the group consisting of copper and cobalt; 1-15 percent gallium; up to 5 percent of a modifier selected from the group consisting of nickel, gold, indium, ruthenium, tin and mixtures thereof; from 0.005 up to 1 percent, ordinarily less than about 0.2 percent, of an oxygen scavenging component which is a member selected from the group consisting of germanium, lithium, and mixtures thereof; and up to 0.5 percent of a grain refiner selected from the group consisting of rhenium and iridium. The alloy is free of boron.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: April 17, 1990
    Assignee: Pierce & Stevens Corporation
    Inventors: Stephen P. Schaffer, Patrick J. McCabe