Patents by Inventor Keiji Nakajima

Keiji Nakajima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10106870
    Abstract: A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are desirably performed a plurality of times. log N?0.4742+17.629×exp(?0.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: October 23, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuhiro Maehara, Mitsuharu Yonemura, Takashi Maeda, Keiji Nakajima, Tsuneaki Nagamichi
  • Patent number: 10023940
    Abstract: A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are most desirably performed for a plurality of times. log N?0.4742+17.629×exp(?0.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: July 17, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuhiro Maehara, Mitsuharu Yonemura, Takashi Maeda, Keiji Nakajima, Tsuneaki Nagamichi
  • Publication number: 20170247779
    Abstract: A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are desirably performed a plurality of times. log N?0.4742+17.629×exp(?0.
    Type: Application
    Filed: March 20, 2017
    Publication date: August 31, 2017
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuhiro MAEHARA, Mitsuharu Yonemura, Takashi Maeda, Keiji Nakajima, Tsuneaki Nagamichi
  • Publication number: 20130121870
    Abstract: A ferritic stainless steel comprising Cr: max 24 mass %, Ti: 200 to 1000 mass ppm, Zr: at least 200 mass ppm, whereby the Zr/Ti ratio is greater than 0.3, O: 10 to 150 mass ppm, N: at least 70 mass ppm, whereby the N/O ratio is greater than 1.5, C: max. 0.03 mass %, and balance Fe and residual elements.
    Type: Application
    Filed: April 26, 2011
    Publication date: May 16, 2013
    Inventors: Keiji Nakajima, Jesper Janis, Andrey Karasev, Pär Jönsson, Stefan Jonsson
  • Publication number: 20100189593
    Abstract: A copper alloy material consists of, by mass % Ti: 0.01-2.5%, Cr: 0.01-0.5%, Fe: 0.01% or more and less than 1%, and the balance Cu and impurities. The copper alloy possesses excellent strength, electrical conductivity, and workability without containing any environmentally harmful elements. These properties are attained by control of the total number and the diameter of precipitates and inclusions having a diameter of 1 ?m, and control of the relationship between tensile strength TS (MPa) and electrical conductivity, IACS (%). The copper alloy material is a sheet and the relationship between tensile strength and the bending workability in a bad way B90 of the copper alloy material as well as the relationship between elongation and tensile strength are also controlled with respect to each other for property improvement.
    Type: Application
    Filed: January 26, 2010
    Publication date: July 29, 2010
    Inventors: Yasuhiro MAEHARA, Mitsuharu YONEMURA, Keiji NAKAJIMA, Tsuneaki NAGAMICHI
  • Publication number: 20090120879
    Abstract: There is provided in the present invention a material for transfer of a substance in a liquid, which can trap/remove an objective substance contained in drainage water, waste water or a liquid at a limited area, and also can readily retrieve the polymer after trapping the objective substance from the liquid. The present invention relates to the material for transfer of a substance in a liquid containing a polymer blend comprising an amine-based polymer and a hydrophilic polymer.
    Type: Application
    Filed: August 4, 2006
    Publication date: May 14, 2009
    Applicants: SHIGA PREFECTURE, OSAKA UNIVERSITY, JAPAN SCIENCE AND TECHNOLOGY AGENCY, SHIGA PREFECTURE INDUSTRIAL SUPPORT CENTER
    Inventors: Sadahito Aoshima, Shokyoku Kanaoka, Keiji Nakajima, Takahiro Uesaka
  • Publication number: 20070062619
    Abstract: A copper alloy that has a specific chemical composition, the balance being Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). This copper alloy is obtained by cooling a bloom, a slab, a billet or an ingot in at least a temperature range from the temperature of the bloom, the slab, the billet or the ingot just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are most desirably performed for a plurality of times. log N<0.4742+17.629×exp(?0.
    Type: Application
    Filed: September 11, 2006
    Publication date: March 22, 2007
    Inventors: Yasuhiro Maehara, Mitsuharu Yonemura, Keiji Nakajima, Tsuneaki Nagamichi
  • Publication number: 20060239853
    Abstract: A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450° C., at a cooling rate of 0.5° C./s or more. After the cooling, working in a temperature range of 600° C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750° C. are desirably performed. The working and the heat treatment are most desirably performed for a plurality of times. log N?0.4742+17.629×exp(?0.
    Type: Application
    Filed: March 20, 2006
    Publication date: October 26, 2006
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Yasuhiro Maehara, Mitsuharu Yonemura, Takashi Maeda, Keiji Nakajima, Tsuneaki Nagamichi
  • Publication number: 20060180293
    Abstract: A continuous casting mold for a Cu alloy, using any one member selected from a glassy carbon, a metal-based self-lubricating composite or a graphite with a bulk density exceeding 1.92, at least for the mold member including the solidification starting position of the Cu alloy melt. A continuous casting mold for a Cu alloy, composed of any one member selected from a graphite, a ceramic and a metal member or of a combination of two or more parts of members thereof, in which at least the inner wall in the solidification starting position of the Cu alloy melt is coated with a self-lubricant or a metal-based self-lubricating composite material.
    Type: Application
    Filed: March 23, 2006
    Publication date: August 17, 2006
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Yasuhiro Maehara, Mitsuharu Yonemura, Keiji Nakajima, Naotsugu Yoshida, Masahiro Aoki
  • Patent number: 6927320
    Abstract: The structure and function of a regulatory gene, SHORT-ROOT (SHR), is described. The SHR gene is expressed specifically in root progenitor tissues of embryos, and in roots and stems of seedlings and plants. SHR expression controls cell division of certain cell types in roots and affects the organization of root and stem tissues, and affects gravitropism of aerial structures. The invention relates to the SHR gene, SHR-like genes, SHR gene products, (including but not limited to transcriptional products such as mRNAs, antisense, and ribozyme molecules, and translational products such the SHR protein, polypeptides, peptides and fusion proteins related thereto), antibodies to SHR gene products, SHR promoters and regulatory regions and the use of the foregoing to improve agronomically valuable plants.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: August 9, 2005
    Assignee: New York University
    Inventors: Philip N. Benfey, Yrjo Helariutta, Hidehiro Fukaki, Keiji Nakajima
  • Patent number: 6368399
    Abstract: A composite pigment of a bluish green color comprises copper phthalocyanine and aluminum phthalocyanine which are preferably in the form of a mixture or solid solution. The composite pigment can be produced by mixing copper phthalocyanine and aluminum phthalocyanine into a mixture and then converting said mixture into a pigment form. A coloring composition comprises at least a resin and a pigment which comprises copper phthalocyanine and aluminum phthalocyanine. The coloring composition can be produced by mixing copper phthalocyanine and aluminum phthalocyanine which have been independently comminuted, into a composite pigment, and then kneading the pigment and a resin such that the pigment is dispersed in the resin. An image recording substance is produced using the coloring composition.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: April 9, 2002
    Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Masahiko Aoba, Yukio Kanbara, Shigeru Takarada, Kazutaka Aoki, Keiji Nakajima, Shotoku Takami
  • Patent number: 6258503
    Abstract: A process is provided for producing a colored fine particulate composition by dissolving or dispersing a coloring matter or a coloring matter and charge control agent in a condensation-polymerized resin component and forming the resultant resin composition into fine particles. The coloring matter or the coloring matter and charge control agent are added to a raw material component for the production of the resin component, or to the resin component in a period from initiation to completion of polymerization of the resin component or while the resin component is in a molten state subsequent to the completion of the polymerization, whereby the coloring matter or the coloring matter and charge control agent are dissolved or dispersed in the resulting resin component. A colored composition obtained subsequent to the dissolution or the dispersion is cooled. The colored composition so cooled is then formed into fine particles.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: July 10, 2001
    Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Michiei Nakamura, Hiroyuki Shimanaka, Kazuo Kanou, Masayuki Takahashi, Yukio Kanbara, Masayuki Kinnou, Chikamasa Nakamura, Keiji Nakajima
  • Patent number: 5814434
    Abstract: A composition for a black matrix is disclosed. The composition is composed of a black pigment and a binder for the pigment. The black pigment is a compound-oxide black pigment, which comprises at least two metal oxides and has a spinel or inverse-spinel crystalline structure. Also discloses are a process for the formation of a black matrix from the composition and an article provided with a black matrix so formed.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: September 29, 1998
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd
    Inventors: Michiei Nakamura, Keiji Nakajima, Shigeru Sakamoto, Takamitsu Shinoda, Mitsuo Yamazaki, Kanako Sato, Motohisa Maruyama, Hiroyoshi Terada, Akira Nishio, Masanori Takakamo, Toshiaki Anzai
  • Patent number: 5036544
    Abstract: An apparatus and method for discriminating the linearity of a line segment in an image processing system consisting of elements for extracting and tracking a train of points from a high contrast portion of a video image and for determining whether the position of one ofthe points exceeds a predetermined threshold value representative of a condition which defines the end of the linearity of the train of points.
    Type: Grant
    Filed: March 10, 1989
    Date of Patent: July 30, 1991
    Assignee: Mitsubishi Kenki Kabushiki Kaisha
    Inventors: Yoshikazu Sakaue, Kazuhiko Sumi, Keiji Nakajima
  • Patent number: 4643424
    Abstract: A plurality of granules of a hard synthetic resin and a soft synthetic resin are heated with a blowing agent to a temperature between the softening temperatures of the hard and soft resins for a predetermined time and are molded to form a ball. The resultant ball has a plurality of bubbles in the soft synthetic resin which surrounds the granules of hard synthetic resin and a suitable cover of leather or rubber is provided for the ball.
    Type: Grant
    Filed: January 11, 1985
    Date of Patent: February 17, 1987
    Inventor: Keiji Nakajima