Patents Examined by Michael P. Alexander
  • Patent number: 7238244
    Abstract: A new nitriding process by using a salt bath to produce iron and steel parts having excellent abrasion resistance and corrosion resistance includes forming an iron lithium complex oxide layer at the outermost surface of the iron part by immersing the iron and steel parts in a salt bath containing cationic component of Li, Na and K and anionic components of CNO?and CO32?, where hydroxide compound selected from lithium hydroxide, sodium hydroxide and potassium hydroxide are added to the salt bath. Materials being in a hydrated state or in a free water containing state can be used for preparation or replenishing of the salt bath. Moistened air of (1×10?2 kg·H2O)/(1 kg dry air) can be used for mixing the salt bath. Containing ratio of Li, Na, K is preferable where a solidifying temperature of the mixture of carbonates of Li, Na, K in that ratio is lower than 500° C.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: July 3, 2007
    Assignees: Parker Netsushori Kogyo K.K., Nihon Parkerizing Co., Ltd.
    Inventors: Tokuo Sato, Yutaka Sawano, Tetsuya Yamamura, Kazuyoshi Kurosawa, Humihide Nakamura, Motohiro Tenmaya
  • Patent number: 7235168
    Abstract: A method of forming a hydrodynamic bearing surface on a workpiece is provided. The method comprises electrochemically etching away all material in a region of the surface, except for portions of the region defined by a land pattern on an etching cathode. The step of removing forms a continuous recessed region comprising grooves formed between the portions of the region defined by the land pattern, and a relief cut region circumscribing the workpiece.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: June 26, 2007
    Assignee: Seagate Technology. LLC
    Inventors: Gunter Heine, Klaus Dieter Kloeppel, Dustin Alan Cochran
  • Patent number: 7208075
    Abstract: A method of reducing a metal oxide in a solid state, in an electrolytic cell, is provided, as is an electrolytic cell suitable for performing the method. The cathode of the electrolytic cell is formed at least in part from the metal oxide to be reduced, and the electrolyte includes cations of a metal that is capable of chemically reducing the cathode metal oxide. The method includes operating the cell at a potential that is above the potential at which cations of the reducing metal will deposit as metal on the cathode.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: April 24, 2007
    Assignee: BHP Billiton Innovation Pty Ltd.
    Inventors: Lazar Strezov, Ivan Ratchev, Steve Osborn
  • Patent number: 7186304
    Abstract: A carbo-nitriding process for forming a martensitic stainless steel, which is case hardened and superior corrosion resistance over carburized process, is provided. A process for forming a martensitic stainless steel which is case hardened is provided. The process comprises the steps of providing a material consisting essentially of from 8.0 to 18 wt % chromium, cobalt up to 16 wt %, vanadium up to 5.0 wt %, molybdenum up to 8.0 wt %, nickel up to 8.0 wt %, manganese up to 4.0 wt %, silicon up to 2.0 wt %, tungsten up to 6.0 wt %, titanium up to 2.0 wt %, niobium up to 4.0 wt % and the balance iron, and carbo-nitriding to prescribed levels of C+N, to form a hard, corrosion resistance case in a fracture tough stainless steel.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: March 6, 2007
    Assignee: United Technologies Corporation
    Inventors: Herbert A. Chin, William P. Ogden, David A. Haluck
  • Patent number: 7175752
    Abstract: An electrochemical machining apparatus and method for machining a workpiece. The apparatus provides a pulse of electric power, which is conducted from the workpiece, to an electrolyte flowing through a gap, and then to an electrode. Material is eroded from the workpiece when the pulse of electric power is applied, thus machining the workpiece. The apparatus includes a power supply to supply the electric power and a switching portion for producing the pulse by switching the electric power ON and OFF. The switching portion is capable of producing a pulse of electric power with a pulse duration of about 2 microseconds and a current of at least about 2800 amperes.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: February 13, 2007
    Assignee: Federal-Mogul Worldwide, Inc.
    Inventor: Yufeng Luo
  • Patent number: 7172725
    Abstract: In W—Cu alloy having a homogeneous micro-structure and a fabrication method thereof, the method includes forming mixed powders by mixing tungsten powders with W—Cu composite powders; forming a compact by pressurizing-forming the mixed powders; forming a skeleton by sintering the compact; and contacting copper to the skeleton and performing infiltration. W—Cu alloy having a homogeneous structure fabricated by the present invention shows better performance by being used as a material for high voltage electric contact of a contact braker, a material for heat sink of an IC semiconductor and a shaped charge liner.
    Type: Grant
    Filed: November 28, 2003
    Date of Patent: February 6, 2007
    Assignee: Agency For Defense Development
    Inventors: Moon-Hee Hong, Ja-Ho Choi, Seoung Lee, Eun-Pyo Kim, Sung-Ho Lee, Joon-Woong Noh
  • Patent number: 7169238
    Abstract: An article and method for forming an article having a hard-finished surface including a predetermined density of carbides to improve pitting and wear resistance and to significantly increase the overall life of the article. This method comprises selecting a carburizing grade material to form an article, carburizing the article to form a microstructure on at least one portion of the article having a predetermined density of carbides dispersed in the microstructure to a predetermined depth, quenching the article to form a hardened matrix dispersed with carbides and hard finishing the article to form the surface, the surface having at least approximately 20% by volume fraction carbides dispersed in the hardened matrix.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: January 30, 2007
    Assignee: Caterpillar Inc
    Inventors: John B. Walenta, Charles F. Berndt, Thomas E. Clements, Steven M. Cross, Timothy M. Hoefft, Gary D. Keil
  • Patent number: 7169286
    Abstract: Disclosed is a reel-to-reel substrate tape polishing and cleaning system including precleaning, electropolishing section and post cleaning sections and which is suitable for polishing and cleaning long lengths of metal substrate tape used in the manufacture of HTS-coated tape.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: January 30, 2007
    Assignee: Superpower, Inc.
    Inventor: Yunfei Qiao
  • Patent number: 7169243
    Abstract: A process is provided for preparation of an aluminum-killed medium-carbon steel sheet containing by weight from 0.040 to 0.080% of carbon, from 0.35 to 0.50% of manganese, from 0.040 to 0.070% of aluminum, from 0.004 to 0.006% of nitrogen, the remainder being iron and the inevitable trace impurities, wherein the steel contains carbon in free state, a grain count per mm2 greater than 20000 and, in the aged condition, has a percentage elongation A % satisfying the relationship: (640-Rm)/10?A %?(700-Rm)/l1 where Rm is the maximum rupture strength.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: January 30, 2007
    Assignee: Sollac
    Inventor: Mohamed Bouzekri
  • Patent number: 7166254
    Abstract: A process for producing a sintered aluminum alloy in which dispersion of tensile strength is small and elongation property and fatigue strength are improved. In this process comprising the steps of compacting powder mixture containing rapidly solidified Al—Si powder, Al powder and Cu powder or Cu alloy powder into a green compact; sintering the green compact with optional heat treatment, Al powder having a maximum particle size smaller than a specific range, an average particle size within a specific range and specific particle size distribution, is used.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: January 23, 2007
    Assignees: Hitachi Powdered Metals Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Jun-ichi Ichikawa, Takashi Suzuki, Hideo Shikata, Hideo Urata, Hayato Matsuda
  • Patent number: 7166256
    Abstract: In order to provide an alloy which, on the one hand, can be used for the synthesis of crown and bridge frameworks that may be provided with a tooth-colored veneer of ceramic material, and, on the other hand, enable the synthesis of model casting bases, a nonprecious metal dental casting alloy is provided which substantially consists of: 26–35 wt % Cr 2–6 wt % Mo 3–12 wt % W 0.8–1.5 wt % Si up to 0.3 wt % Mn 0.1–0.35 wt % N <0.1 wt % Ni 0.2–1.5 wt % Ta and manufacturing impurities of <0.1 wt % in each case, remainder cobalt, the content of tungsten being always greater than the content of molybdenum.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: January 23, 2007
    Assignee: J.P. Winkelstroeter KG
    Inventor: Jürgen Lindigkeit
  • Patent number: 7163595
    Abstract: The thermal process for treating a metal to improve structural characteristics of the metal entails placing a metal within a thermal control apparatus; introducing a cryogenic material into the thermal control apparatus to decrease the metal temperature, while preventing over-stressing of the metal, to a first target temperature ranging from ?40 degrees F. and ?380 degrees F. at a first temperature rate ranging from 0.25 degrees per minute and 20 degrees per minute; stopping the introduction of the cryogenic material once the first target temperature is reached; increasing the chamber temperature to a second target, temperature ranging from 0 degrees F. and 1400 degrees F.; and increasing the metal temperature to the second target temperature at a second temperature rate ranging from 0.25 degrees per minute and 20 degrees per minute, resulting in a treated metal without fractures.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: January 16, 2007
    Inventor: Daniel Watson
  • Patent number: 7160431
    Abstract: A method and apparatus for forming a fluid dynamic pressure groove in a fluid dynamic pressure bearing is provided. The method is accomplished by initially positioning and securing multiple workpieces to be machined to their respective machining devices. An electrochemical dissolving effect is imparted to each target surface of the multiple workpieces and then at least one fluid dynamic pressure groove is formed on each target surface of the multiple workpieces. Each groove may have a specified shape, dimension and surface condition. An electrolyte is directed from a common electrolyte tank to each of the machining devices used on the multiple workpieces.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: January 9, 2007
    Assignee: Minebea Co., Ltd.
    Inventors: Hiroshi Yoshikawa, Tomoyuki Yasuda
  • Patent number: 7160432
    Abstract: Polishing compositions and methods for removing conductive materials from a substrate surface are provided. In one aspect, a method is provided for processing a substrate to remove conductive material disposed over narrow feature definitions formed in a substrate at a higher removal rate than conductive material disposed over wide feature definitions formed in a substrate by an electrochemical mechanical polishing technique. The electrochemical mechanical polishing technique may include a polishing composition comprising an acid based electrolyte system, one or more chelating agents, one or more corrosion inhibitors, one or more inorganic or organic acid salts, one or more pH adjusting agents to provide a pH between about 2 and about 10, and a solvent.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: January 9, 2007
    Assignee: Applied Materials, Inc.
    Inventors: Feng Q. Liu, Liang-Yuh Chen, Stan D. Tsai, Alain Duboust, Siew S. Neo, Yongqi Hu, Yan Wang, Paul D. Butterfield
  • Patent number: 7156963
    Abstract: Provided is a tantalum sputtering target having a crystal structure in which the (222) orientation is preferential from a position of 10% of the target thickness toward the center face of the target, and a manufacturing method of a tantalum sputtering target, including the steps of forging and recrystallization annealing, and thereafter rolling, a tantalum ingot or billet having been subject to melting and casting, and forming a crystal structure in which the (222) orientation is preferential from a position of 10% of the target thickness toward the center face of the target. As a result, evenness (uniformity) of the film is enhanced, and quality of the sputter deposition is improved.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: January 2, 2007
    Assignee: Nippon Mining & Metals Co., Ltd.
    Inventor: Kunihiro Oda
  • Patent number: 7156964
    Abstract: The present invention provides a sputtering target for a phase change memory and a phase change memory film formed with such a target, and the manufacturing method thereof, characterized in that the sputtering target is composed from elements of not less than a three component system and has as its principal component one or more components selected from stibium, tellurium and selenium, and the compositional deviation in relation to the intended composition is ±1.0 at % or less.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: January 2, 2007
    Assignee: Nippon Mining & Metals Co., Ltd.
    Inventors: Masataka Yahagi, Yuichiro Shindo, Hideo Takami
  • Patent number: 7157044
    Abstract: A titanium based carbonitride alloy contains Ti, Nb, W, C, N and Co. The alloy also contains, in addition to Ti, Co with only impurity levels of Ni and Fe, 4–7 at % Nb, 3–8 at % W and has a C/(C+N) ratio of 0.50–0.75. The Co content is 9–<12 at % for general finishing applications and 12–16% for semifinishing applications. The amount of undissolved Ti(C,N) cores must be kept between 26 and 37 vol % of the hard constituents, the balance being one or more complex carbonitrides containing Ti, Nb and W. The invented alloy is particularly useful for semifinishing of steel and cast iron.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: January 2, 2007
    Assignee: Sandvik Intellectual Property AB
    Inventors: Ulf Rolander, Marco Zwinkels, Gerold Weinl
  • Patent number: 7153411
    Abstract: A method of cleaning and polishing an alloy comprising at least one noble metal and at least one non-noble metal, the method including the steps of submerging said alloy in an electrolytic acidic bath comprising at least one chelating or complexing agent including sulfur, and applying a multiple pulse periodic reverse waveform, and articles cleaned and/or polished thereby.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: December 26, 2006
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Steve Larson, Daniel VanCamp, Nielsen Eric
  • Patent number: 7150820
    Abstract: An aqueous thiourea-free gold etching bath for electrolytically etching gold from a microelectronic workpiece. One embodiment of the aqueous thiourea-free bath contains: (a) about 0.5–1.5 M iodide; (b) about 0.1–0.3 M sulfite; and (c) about 1.0–3.0 g/L wetting agent. The bath is useful in a process for electrolytically etching gold from a microelectronic workpiece. A tool system in which the baths and processes of the present invention may be used is also described.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: December 19, 2006
    Assignee: Semitool, Inc.
    Inventors: Zhongmin Hu, Eric J. Young
  • Patent number: 7147731
    Abstract: A spacer 44 is inserted between an upper end face 44a of a contact column 40, and a lower face of a flange 14. The flange 14 is supported at plural positions by supporting columns 42. In heating a shoulder portion 16 to a hardening temperature, an electroconductive member 56 is placed close to the shoulder portion 16, and an AC current having a frequency which will cause mutual attraction between the current flowing through the elctroconductive member 56 and the current flowing through the shoulder portion 16 is applied to flow through the electroconductive member 56. The shoulder portion 16 having been heated to the hardening temperature is quenched by ejecting a liquid coolant through ejection outlets of a cooling jacket.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: December 12, 2006
    Assignee: Neturen Co., Ltd.
    Inventors: Yoshimasa Tanaka, Katsumi Ohmiya, Yoshiki Seto, Yoichi Mori