Patents Assigned to AT&T Corp.
  • Patent number: 11007558
    Abstract: A diamond die includes a diamond provided with a hole for drawing a wire material, the diamond being a CVD single-crystal diamond, an axis of the hole being inclined relative to a normal direction of a crystal plane of the diamond.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: May 18, 2021
    Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Makoto Yukawa, Bunya Suemitsu, Takuya Kinoshita, Shigetoshi Sumimoto, Yutaka Kobayashi, Akihiko Ueda, Natsuo Tatsumi, Yoshiki Nishibayashi, Hitoshi Sumiya
  • Publication number: 20210013122
    Abstract: Provided is a plating film containing Au and Tl, including Tl oxides including Tl2O on a surface of the plating film, a ratio of Tl atoms constituting Tl2O to a total of Tl atoms constituting the Tl oxides and Tl atoms constituting Tl simple substances on the surface being 40% or more.
    Type: Application
    Filed: February 26, 2019
    Publication date: January 14, 2021
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Kengo GOTO, Akihisa HOSOE, Tadashi ARIKAWA, Hiroya SATO, Masatoshi NAGASHIMA, Shohei MURAKAMI
  • Publication number: 20210008625
    Abstract: A molybdenum material having a diameter of 75 mm or more and a length of 250 mm or more, and having a relative density of 99.5% or more.
    Type: Application
    Filed: March 20, 2019
    Publication date: January 14, 2021
    Applicant: A.L.M.T. Corp.
    Inventors: Akihiro YOSHIDA, Takanori KADOKURA, Tomohiro TAKIDA
  • Publication number: 20210002769
    Abstract: A composite member includes: a substrate formed of a composite material containing a plurality of diamond grains and a metal phase; and a coating layer made of metal. The surface of the substrate includes a surface of the metal phase, and a protrusion formed of a part of at least one diamond grain of the diamond grains and protruding from the surface of the metal phase. In a plan view, the coating layer includes a metal coating portion, and a grain coating portion. A ratio of a thickness of the grain coating portion to a thickness of the metal coating portion is equal to or less than 0.80. The coating layer has a surface roughness as an arithmetic mean roughness Ra of less than 2.0 ?m.
    Type: Application
    Filed: January 30, 2019
    Publication date: January 7, 2021
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Kengo GOTO, Tomoaki IKEDA, Akihisa HOSOE, Masanori SUGISAWA, Fukuto ISHIKAWA, Hideaki MORIGAMI
  • Patent number: 10875152
    Abstract: A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: December 29, 2020
    Assignee: A.L.M.T. Corp.
    Inventor: Nobuhide Nakamura
  • Publication number: 20200392606
    Abstract: A powder containing tungsten carbide has an Fsss particle size of greater than or equal to 0.3 ?m and less than or equal to 1.5 ?m, and a content rate of the tungsten carbide of greater than or equal to 90% by mass. The powder has a crystallite size (average particle diameter) Y satisfying a relational expression of Y?0.1×X+0.20 (X: the Fsss particle size of the power containing tungsten carbide).
    Type: Application
    Filed: November 13, 2018
    Publication date: December 17, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Takayuki FUDO, Kazuo SASAYA, Takehiko HAYASHI
  • Patent number: 10858759
    Abstract: The molybdenum crucible includes a cylindrical side wall and a bottom provided integrally with one end of the side wall. The side wall includes a coarse grain region configured to extend from an outer wall toward an inner wall and a fine grain region configured to extend from the inner wall toward the outer wall so as to be in contact with the coarse grain region. The ratio of the coarse grain region in the side wall in the thickness direction thereof is 10% or more and less than 90%. The coarse grain region is defined as such a region in which crystal grains having a grain size of 1 mm or more determined by an intercept method in the height direction of the crucible occupy 95% or more of an area of a measurement region.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: December 8, 2020
    Assignee: A.L.M.T. Corp.
    Inventors: Makoto Watanabe, Yoshitake Fukaya, Masahiro Katoh, Hidenobu Nishino
  • Patent number: 10858252
    Abstract: A complex carbonitride powder contains Ti as a main component element and at least one additional element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, and Si. The complex carbonitride powder includes a plurality of complex carbonitride particles containing Ti and the additional element. The plurality of complex carbonitride particles include a plurality of homogeneous composition particles where average concentrations of Ti and the additional element in each complex carbonitride particle have a difference in a range of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in the whole complex carbonitride powder. A cross-sectional area of the homogeneous composition particles is greater than or equal to 90% of a cross-sectional area of the complex carbonitride particles 1p.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: December 8, 2020
    Assignees: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato, Tomoyuki Ishida, Akihide Matsumoto, Takehiko Hayashi
  • Publication number: 20200346935
    Abstract: Provided is a tungsten carbide powder satisfying such a condition that when the Fsss particle size thereof is represented by a (?m) and the BET particle size thereof converted from the BET specific surface area is represented by b (?m), a is 0.40 ?m or more and 1.50 ?m or less, and b/a is 0.17 or more and 0.35 or less.
    Type: Application
    Filed: October 12, 2017
    Publication date: November 5, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Takehiko HAYASHI, Tomoyuki ISHIDA, Takahiro YAMAKAWA
  • Patent number: 10807135
    Abstract: A shaped diamond die includes a polycrystalline diamond, the polycrystalline diamond having a machining hole, wherein a length D of a side of the machining hole is 100 ?m or less, a corner R is 20 ?m or less, the shaped diamond die includes a bearing portion, a surface roughness Sa of the bearing portion is 0.05 ?m or less, and an average grain size of the polycrystalline diamond is 500 nm or less.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: October 20, 2020
    Assignee: A.L.M.T. Corp.
    Inventors: Toshiaki Shindo, Takuya Asanuma
  • Patent number: 10777403
    Abstract: A tungsten electrode material contains a tungsten-based material and oxide particles dispersed in the tungsten-based material. The oxide particles are composed of an oxide solid solution in which a Zr oxide and/or an Hf oxide and an oxide of at least one rare earth selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are dissolved as a solid solution. A content of the rare-earth oxide with respect to a total amount of the Zr oxide and/or the Hf oxide and the rare-earth oxide is not lower than 66 mol % and not higher than 97 mol %, a content of the oxide solid solution is not lower than 0.5 mass % and not higher than 9 mass %, and the remainder is composed substantially of tungsten.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: September 15, 2020
    Assignee: A.L.M.T. Corp.
    Inventors: Seiji Nakabayashi, Tomohiro Takida
  • Publication number: 20200238477
    Abstract: There is provided a vitrified bond super-abrasive grinding wheel including: a core; and a super-abrasive grain layer provided on the core, wherein the super-abrasive grain layer includes a plurality of super-abrasive grains and a vitrified bond that joins the plurality of super-abrasive grains, and the vitrified bond has a plurality of bond bridges located between the plurality of super-abrasive grains to join the plurality of super-abrasive grains, not less than 80% of the plurality of super-abrasive grains are joined to the super-abrasive grains adjacent thereto by the bond bridges, and not less than 90% of the plurality of bond bridges in a cross section of the super-abrasive grain layer have a thickness equal to or smaller than an average grain size of the super-abrasive grains, and have a length greater than the thickness.
    Type: Application
    Filed: September 18, 2018
    Publication date: July 30, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Shuichi AMINO, Tomohiro ISHIZU
  • Publication number: 20200230708
    Abstract: An outer peripheral cutting edge located on a rear side in a rotation axis direction of the inclined cutting edge, a rotation diameter of the base metal on the rear side in the rotation axis direction of the outer peripheral cutting edge is smaller than a rotation diameter of the outer peripheral cutting edge, in a cross section perpendicular to a direction in which the inclined cutting edge extends, a cutting edge ridge of the inclined cutting edge has a roundness of a radius less than or equal to 30 ?m, and a maximum height difference value of the cutting edge ridge of the inclined cutting edge is less than or equal to 20 ?m.
    Type: Application
    Filed: September 18, 2018
    Publication date: July 23, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Yuma MIYAZAKI, Kentaro SHIRO
  • Publication number: 20200156213
    Abstract: There is provided a super-abrasive grain including: a body composed of cubic boron nitride or diamond; and a ceramic coating film coating at least a portion of a surface of the body.
    Type: Application
    Filed: December 6, 2018
    Publication date: May 21, 2020
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Akito ISHII, Katsumi OKAMURA, Tomokazu NAKAMURA, Nobuhide NAKAMURA
  • Publication number: 20200066505
    Abstract: A tungsten electrode material contains a tungsten-based material and oxide particles dispersed in the tungsten-based material. The oxide particles are composed of an oxide solid solution in which a Zr oxide and/or an Hf oxide and an oxide of at least one rare earth selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are dissolved as a solid solution. A content of the rare-earth oxide with respect to a total amount of the Zr oxide and/or the Hf oxide and the rare-earth oxide is not lower than 66 mol % and not higher than 97 mol %, a content of the oxide solid solution is not lower than 0.5 mass % and not higher than 9 mass %, and the remainder is composed substantially of tungsten.
    Type: Application
    Filed: March 23, 2018
    Publication date: February 27, 2020
    Applicant: A.L.M.T. Corp.
    Inventors: Seiji NAKABAYASHI, Tomohiro TAKIDA
  • Patent number: 10553519
    Abstract: A heat radiating member includes: a composite portion composed of a composite material which contains particles of a satisfactorily thermally conductive material in a metal matrix; and a metal layer formed on at least one surface of the composite portion and composed of a metal. A method for producing a heat radiating member includes: a preparation step to prepare a composite material which contains particles of a satisfactorily thermally conductive material in a metal matrix; a powder arrangement step to dispose a metal powder composed of metal particles on at least one surface of the composite material; and a heating step to heat the composite material and the metal powder, with the metal powder disposed on the composite material, to form a metal layer composed of a metal of the metal powder on a composite portion composed of the composite material.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: February 4, 2020
    Assignees: A.L.M.T. Corp, Sumitomo Electric Industries, Ltd.
    Inventors: Tatsuya Morikawa, Takanori Kadokura, Isao Iwayama
  • Patent number: 10465266
    Abstract: The present heat-resistant tungsten alloy has a first phase containing W as a major component, a second phase having a carbonitride of at least one element of Ti, Zr and Hf and containing the carbonitride as a major component when W is removed, and a third phase having a carbide of at least one element of group 5A elements in the periodic table and containing the carbide as a major component when W is removed, the heat-resistant tungsten alloy having a Vickers hardness of 550 Hv or more at a room temperature, a displacement of 1 mm or more when leading to fracture, as determined in a three point bending test at 1200° C., and a 0.2% proof stress of 900 MPa or more, as determined in the three point bending test at 1200° C.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: November 5, 2019
    Assignee: A.L.M.T. CORP.
    Inventors: Ayuri Tsuji, Shigekazu Yamazaki, Akihiko Ikegaya, Noboru Uenishi
  • Publication number: 20190329308
    Abstract: A shaped diamond die includes a polycrystalline diamond, the polycrystalline diamond having a machining hole, wherein a length D of a side of the machining hole is 100 ?m or less, a corner R is 20 ?m or less, the shaped diamond die includes a bearing portion, a surface roughness Sa of the bearing portion is 0.05 ?m or less, and an average grain size of the polycrystalline diamond is 500 nm or less.
    Type: Application
    Filed: December 8, 2017
    Publication date: October 31, 2019
    Applicant: A.L.M.T. Corp.
    Inventors: Toshiaki SHINDO, Takuya ASANUMA
  • Publication number: 20190297725
    Abstract: A composite member includes a substrate composed of a composite material containing a metal and a non-metal. One surface of the substrate has spherical warpage of which radius of curvature R is not smaller than 5000 mm and not greater than 35000 mm. A sphericity error is not greater than 10.0 ?m, the sphericity error being defined as an average distance between a plurality of measurement points on a contour of a warped portion of the substrate and approximate arcs defined by the plurality of measurement points. The substrate has a thermal conductivity not lower than 150 W/m·K and a coefficient of linear expansion not greater than 10 ppm/K.
    Type: Application
    Filed: November 8, 2017
    Publication date: September 26, 2019
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Isao IWAYAMA, Shigeki KOYAMA, Masashi OKAMOTO, Yuta INOUE, Hiroyuki KONTANI, Takehisa YAMAMOTO
  • Patent number: D872872
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: January 14, 2020
    Assignee: A.L.M.T. CORP.
    Inventors: Yoshitake Fukaya, Masahiro Kato, Makoto Watanabe, Kiyohide Sasaki