Patents by Inventor Katsumi Mabuchi

Katsumi Mabuchi 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: 10836138
    Abstract: An object of the present invention is to provide a product excellent in corrosion resistance and abrasion resistance. In order to achieve the above object, a laminated body according to the invention includes a substrate and a coating formed on the surface of the substrate, in which the coating includes repeated unit structures each composed of a first layer whose main component is Ni and a second layer whose main component is a metal whose electrode potential is baser than that of Ni.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: November 17, 2020
    Assignee: HITACHI, LTD.
    Inventors: Hiroshi Kanemoto, Katsumi Mabuchi, Hiroshi Nakano
  • Publication number: 20180264782
    Abstract: An object of the present invention is to provide a product excellent in corrosion resistance and abrasion resistance. In order to achieve the above object, a laminated body according to the invention includes a substrate and a coating formed on the surface of the substrate, in which the coating includes repeated unit structures each composed of a first layer whose main component is Ni and a second layer whose main component is a metal whose electrode potential is baser than that of Ni.
    Type: Application
    Filed: April 22, 2016
    Publication date: September 20, 2018
    Applicant: HITACHI, LTD.
    Inventors: Hiroshi KANEMOTO, Katsumi MABUCHI, Hiroshi NAKANO
  • Patent number: 9695348
    Abstract: Provided is a working medium of the present invention for absorption refrigerators is a mixture that is to contact a carbon steel or a copper alloy that is a structural material of any one of the absorption refrigerators, and includes water and 1,4-dioxane, and further includes a corrosion inhibitor. The corrosion inhibitor includes one or more selected from the group consisting of respective hydroxides of any alkali metal and any alkaline earth metal, and respective oxoates. Thus, corrosion of the structural material of the absorption refrigerator can be restrained.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: July 4, 2017
    Assignee: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC.
    Inventors: Katsumi Mabuchi, Tatsuo Fujii, Nobuyuki Takeda
  • Publication number: 20160075928
    Abstract: Provided is a working medium of the present invention for absorption refrigerators is a mixture that is to contact a carbon steel or a copper alloy that is a structural material of any one of the absorption refrigerators, and includes water and 1,4-dioxane, and further includes a corrosion inhibitor. The corrosion inhibitor includes one or more selected from the group consisting of respective hydroxides of any alkali metal and any alkaline earth metal, and respective oxoates. Thus, corrosion of the structural material of the absorption refrigerator can be restrained.
    Type: Application
    Filed: September 10, 2015
    Publication date: March 17, 2016
    Applicants: HITACHI APPLIANCES, INC., HITACHI, LTD.
    Inventors: Katsumi MABUCHI, Tatsuo FUJII, Nobuyuki TAKEDA
  • Patent number: 9275670
    Abstract: A method for producing a magnetic recording medium in one embodiment includes forming a magnetic material layer above a substrate, transferring an uneven pattern to the magnetic material layer to form concave portions and convex portions, the convex portions being magnetic regions, depositing a nonmagnetic material above the concave portions to form nonmagnetic regions, forming an oxide layer and/or hydroxide layer above the magnetic regions of the recording layer, and forming an organic material layer which exhibits a corrosion-inhibiting characteristic with respect to cobalt or cobalt alloy above the oxide layer and/or hydroxide layer.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: March 1, 2016
    Assignee: HGST Netherlands B.V.
    Inventors: Qing Dai, Bruno Marchon, Katsumi Mabuchi, Mina Amo
  • Patent number: 9136244
    Abstract: Reliability is improved by improving adhesiveness, crack resistance, and moisture resistance of a metal member-resin jointed body by enhancing adhesiveness between the metal member and the resin. A jointed body of a metal member and a resin including: an intermediate layer and a silane coupling agent layer formed on the metal member at an interface between the metal member and the resin, wherein the silane coupling agent layer and the resin are contacted; the intermediate layer is any one of an oxide layer of the metal, a chelating agent layer, a composite layer made of the oxide layer and the chelating agent layer, and a mixed layer made of the oxide and the chelating agent; and the intermediate layer has an electrically non-insulating characteristic, and a method of manufacturing the same.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: September 15, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Mabuchi, Haruo Akahoshi, Shigehisa Motowaki
  • Patent number: 8802247
    Abstract: A medium having high medium S/N and excellent corrosion resistance is achieved. In one embodiment, an adhesion layer, a soft magnetic layer, an intermediate layer, a magnetic recording layer, and a protective layer are deposited, in order, on a substrate. The soft magnetic underlayer consists at least of two soft magnetic layers, the first soft magnetic layer formed on the recording layer side being composed of an amorphous alloy containing 85 at. % or less of Co, and the second soft magnetic layer formed on the substrate side being composed of an alloy containing more than 85 at. % of Co.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: August 12, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Hiroyuki Matsumoto, Mitsuhiro Shoda, Reiko Arai, Yuzuru Hosoe, Katsumi Mabuchi
  • Patent number: 8791019
    Abstract: The present invention provides a metal polishing liquid capable of CMP at a high Cu polishing rate and solving the problems: (a) generation of scratches attributable to solid particles, (b) generation of deteriorations in flatness such as dishing and erosion, (c) complexity in a washing process for removing abrasive particles remaining on the surface of a substrate after polishing, and (d) higher costs attributable to the cost of a solid abrasive itself and to waste liquid treatment, as well as a method of polishing a film to be polished by using the same.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: July 29, 2014
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yutaka Nomura, Hiroshi Nakagawa, Sou Anzai, Ayako Tobita, Takafumi Sakurada, Katsumi Mabuchi
  • Publication number: 20140199501
    Abstract: A method for producing a magnetic recording medium in one embodiment includes forming a magnetic material layer above a substrate, transferring an uneven pattern to the magnetic material layer to form concave portions and convex portions, the convex portions being magnetic regions, depositing a nonmagnetic material above the concave portions to form nonmagnetic regions, forming an oxide layer and/or hydroxide layer above the magnetic regions of the recording layer, and forming an organic material layer which exhibits a corrosion-inhibiting characteristic with respect to cobalt or cobalt alloy above the oxide layer and/or hydroxide layer.
    Type: Application
    Filed: March 24, 2014
    Publication date: July 17, 2014
    Applicant: HGST NETHERLANDS B.V.
    Inventors: Qing Dai, Bruno Marchon, Katsumi Mabuchi, Mina Amo
  • Patent number: 8717710
    Abstract: In one embodiment, a magnetic recording medium includes a magnetic recording layer including a magnetic material characterized by having convex and concave portions, the convex portions acting as magnetic regions, a nonmagnetic material positioned within each concave portion of the magnetic material which act as nonmagnetic regions that separate the magnetic regions, an organic material layer which exhibits a corrosion-inhibiting characteristic with respect to cobalt or cobalt alloy positioned on a nonmagnetic region side of each concave portion, and an oxide layer and/or hydroxide layer positioned adjacent the organic material layer on a magnetic region side of each concave portion of the magnetic material. In another embodiment, the magnetic recording medium may be a patterned recording layer having a protective film, and the oxide layer and/or hydroxide layer may be positioned at least in defect portions of the protective film.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: May 6, 2014
    Assignee: HGST Netherlands, B.V.
    Inventors: Qing Dai, Bruno Marchon, Katsumi Mabuchi, Mina Amo
  • Patent number: 8687309
    Abstract: This invention provides a magnetic recording medium excellent in terms of corrosion resistance. The magnetic recording medium comprises a magnetic recording layer, a protective layer and a lubricant layer provided on a nonmagnetic substrate, and the lubricant layer comprises a compound having a heterocyclic ring.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: April 1, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Mabuchi, Kyoko Honbo, Mina Amo
  • Patent number: 8628869
    Abstract: According to one embodiment, a lubricant includes a perfluoropolyether having a chemical structure of: wherein Rf is at least one of: —CF2O(CF2CF2O)m(CF2O)nCF2— and —CF2CF2O(CF2CF2CF2O)kCF2CF2—, with m representing 0 or a positive integer, n representing 0 or a positive integer, and k representing 0 or a positive integer, and wherein R1 to R4 are selected from a group consisting of —H or with at least one of R1 to R4 being
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: January 14, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Mina Amo, Katsumi Mabuchi, Hiroshi Yoshida, Bruno Marchon, Qing Dai
  • Publication number: 20130301157
    Abstract: In one embodiment, a magnetic recording medium includes a magnetic recording layer including a magnetic material characterized by having convex and concave portions, the convex portions acting as magnetic regions, a nonmagnetic material positioned within each concave portion of the magnetic material which act as nonmagnetic regions that separate the magnetic regions, an organic material layer which exhibits a corrosion-inhibiting characteristic with respect to cobalt or cobalt alloy positioned on a nonmagnetic region side of each concave portion, and an oxide layer and/or hydroxide layer positioned adjacent the organic material layer on a magnetic region side of each concave portion of the magnetic material. In another embodiment, the magnetic recording medium may be a patterned recording layer having a protective film, and the oxide layer and/or hydroxide layer may be positioned at least in defect portions of the protective film.
    Type: Application
    Filed: May 8, 2012
    Publication date: November 14, 2013
    Applicant: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V.
    Inventors: Qing Dai, Bruno Marchon, Katsumi Mabuchi, Mina Amo
  • Publication number: 20130280524
    Abstract: Provided is a surface treatment technique for a metal base material, which can be applied also to a metal base material in the form of a thin film, can substantially maintain the function of the surface of the metal base material, and provides excellent corrosion resistance and pitting corrosion resistance. The present invention relates to a corrosion-proof aluminum material, including: a metal base material composed of aluminum or an aluminum alloy; and a coating film layer formed with a silane coupling agent having a sulfur atom and disposed on a surface of the metal base material, wherein the ratio of the concentration of sulfur atom in the surface of the coating film layer to the concentration of aluminum atom is 0.4 or more.
    Type: Application
    Filed: April 12, 2013
    Publication date: October 24, 2013
    Applicant: Hitachi, Ltd.
    Inventor: Katsumi MABUCHI
  • Publication number: 20130194693
    Abstract: According to one embodiment, a lubricant includes a perfluoropolyether having a chemical structure of wherein Rf is at least one of —CF2O(CF2CF2O)m(CF2O)nCF2— and —CF2CF2O(CF2CF2CF2O)kCF2CF2—, with m representing 0 or a positive integer, n representing 0 or a positive integer, and k representing 0 or a positive integer, and wherein R1 to R4 are selected from a group consisting of —H or with at least one of R1 to R4 being
    Type: Application
    Filed: January 30, 2012
    Publication date: August 1, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Mina Amo, Katsumi Mabuchi, Hiroshi Yoshida, Bruno Marchon, Qing Dai
  • Patent number: 8367573
    Abstract: A glass composition substantially free from lead and bismuth and containing vanadium oxide and phosphor oxide as main ingredients, wherein the sintered glass of the glass composition exhibits 109 ?cm or more at 25° C.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: February 5, 2013
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Takashi Naito, Shinichi Tachizono, Kei Yoshimura, Hiroki Yamamoto, Hiroshi Yoshida, Shinji Yamada, Katsumi Mabuchi
  • Patent number: 8327460
    Abstract: The present invention allows simple and sensitive detection of microimpurities, microdefects, and corrosion starting points which may be present in a material. A probe microscope has a function to sense ions diffused from a specimen in a liquid. A probe is caused to scan over a predetermined range on a specimen. Then, the probe is fixed to a particular position in a liquid so as to set the distance between the specimen and the probe to a given value at which the microstructure of the specimen surface cannot be observed. Thereafter, one of the current between the probe and a counter electrode and the potential between the probe and a reference electrode is controlled, and the other of the current and potential which varies in accordance with the control is measured. Thus, ions diffused from the specimen are sensed.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: December 4, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Kyoko Honbo, Katsumi Mabuchi, Motoko Harada
  • Patent number: 8318332
    Abstract: A discrete track medium and a patterned medium that are excellent in both magnetic recording properties and corrosion resistance are realized. The medium has a magnetic recording layer, which includes a magnetic region formed in a projection portion of a projection/recess pattern over a substrate and a filler region embedded in a recess portion of the projection/recess pattern, and an organic compound, which exhibits corrosion inhibition action for cobalt or cobalt alloys, between the magnetic region and the filler region.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: November 27, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Mabuchi, Haruo Akahoshi
  • Publication number: 20120205010
    Abstract: The present invention provides a method of preventing a metal from corroding by giving a high corrosion resistance in the state of retaining the functions of the metal surface, a surface of a thin film material particularly. A stable silane coupling layer which has a robust bond is formed on a metal surface by using a silane coupling agent and an oxidizer in combination.
    Type: Application
    Filed: February 9, 2012
    Publication date: August 16, 2012
    Inventors: Katsumi Mabuchi, Haruo Akahoshi
  • Publication number: 20120008228
    Abstract: This invention provides a magnetic recording medium excellent in terms of corrosion resistance. The magnetic recording medium comprises a magnetic recording layer, a protective layer and a lubricant layer provided on a nonmagnetic substrate, and the lubricant layer comprises a compound having a heterocyclic ring.
    Type: Application
    Filed: July 8, 2011
    Publication date: January 12, 2012
    Inventors: Katsumi MABUCHI, Kyoko Honbo, Mina Amo