Patents by Inventor Hitoshi Ohta

Hitoshi Ohta 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).

  • Publication number: 20120176455
    Abstract: Printing is performed on a non-ink absorbing or low-ink absorbing recording medium, by providing a drying process, using an aqueous ink composition at least containing glycol ethers having an HLB value calculated by the Davis method in the range of 4.2 to 8.0 and 1,2-alkyldiols having 4 to 8 carbon atoms and a liquid composition at least containing glycol ethers having an HLB value calculated by the Davis method in the range of 4.2 to 8.0 and 1,2-alkyldiols having 4 to 8 carbon atoms.
    Type: Application
    Filed: March 22, 2011
    Publication date: July 12, 2012
    Inventors: Hitoshi Ohta, Hidehiko Komatsu, Yoshimasa Tamura
  • Patent number: 8210672
    Abstract: An inkjet recording method, including printing with an ink including a chromatic ink, an achromatic ink, and a resin ink; the resin ink contains at least thermoplastic resin particles that are insoluble in water but compatible with water-soluble solvents for resins as well as water-soluble solvent for resins; the inks all contain a silicon surfactant and an acetylene glycol surfactant that has an HLB value equal to or less than 6; and the printing method includes a step of drying performed during and/or after printing.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: July 3, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Hiroshi Mukai, Hidehiko Komatsu, Hiroshi Ito, Hitoshi Ohta
  • Publication number: 20120159284
    Abstract: According to one embodiment, a semiconductor memory device includes a memory cell array, a buffer unit, an error correction unit, a data transfer unit, a memory unit, a data input/output unit, a data bus, and a control unit. The control unit controls a first operating mode in which the memory unit is used and a second operating mode in which the memory unit is not used. In the second operating mode, the data transfer unit transfers the data supplied to the input/output unit through the data bus, to the data buffer unit, transfers the data transferred to the data buffer, to the error correction unit and transfers parity data generated in the error correction unit, to the buffer unit.
    Type: Application
    Filed: November 3, 2011
    Publication date: June 21, 2012
    Inventor: Hitoshi OHTA
  • Publication number: 20120155178
    Abstract: According to one embodiment, a semiconductor memory device includes a memory, and a data transfer section configured to perform data transfer from and to the memory, and having a first mode to transfer data with a first bit width and a second mode to transfer data with a second bit width. The data transfer section includes a first latch circuit configured to hold first data read from the memory, a second latch circuit configured to hold second data having the first bit width of the first data in the first mode, and to hold third data having the second bit width of the first data in the second mode, and data bus connecting the first latch circuit to the second latch circuit and shared by the first and second modes.
    Type: Application
    Filed: September 18, 2011
    Publication date: June 21, 2012
    Inventors: Hitoshi OHTA, Mitsuhiro Abe, Eiji Kozuka, Takatomi Izumi
  • Publication number: 20110234682
    Abstract: The aqueous ink composition according to the invention includes at least a water-insoluble coloring agent, a glycol ether having an HLB value calculated by a Davies' method in the range of 4.2 to 8.0, a 1,2-alkyldiol having 4 to 8 carbon atoms, resin particles, and water.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 29, 2011
    Applicant: Seiko Epson Corporation
    Inventors: Hitoshi Ohta, Yoshimasa Tamura
  • Patent number: 7755956
    Abstract: A non-volatile semiconductor memory includes a memory cell array. The memory cell array includes a plurality of banks, redundant blocks, and special blocks storing management data. Each bank includes a plurality of normal blocks, which include a plurality of electrically rewritable memory cells, the normal block being a minimum unit which is independently erased, and the redundant block configured to replace the normal block and being incapable of replacing the special block. A defective block automatic replacement sequence control circuit controls the replacement operation of the defective block FBLK with the redundant block RBLK in a defective block automatic replacement sequence.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: July 13, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi Ohta, Tomohito Kawano
  • Publication number: 20100086692
    Abstract: An ink jet printing method includes forming an image by discharging droplets of an aqueous ink composition onto a non-ink-absorbing or low ink-absorbing recording medium by ink jet printing, and drying the aqueous ink composition on the recording medium during and/or after forming the image, wherein the aqueous ink composition contains a water-insoluble colorant, resin particles, a silicone surfactant, an acetylene glycol surfactant, a pyrrolidone derivative, a 1,2-alkyldiol, a polyhydric alcohol, and water, and the resin particles contain resin fixative particles and wax particles.
    Type: Application
    Filed: October 8, 2009
    Publication date: April 8, 2010
    Inventor: Hitoshi OHTA
  • Publication number: 20100086689
    Abstract: A printing method includes forming an image by ejecting droplets of an aqueous ink composition onto an ink-non-absorbent or ink-low-absorbent recording medium by an ink jet recording technique, and drying the aqueous ink composition on the recording medium at least one of during and after forming the image. The aqueous ink composition contains a water-insoluble coloring agent, a resin component, a silicone surfactant, an acetylene glycol-based surfactant, a pyrrolidone derivative, 1,2-alkyldiol, a polyhydric alcohol, and water.
    Type: Application
    Filed: October 6, 2009
    Publication date: April 8, 2010
    Inventor: Hitoshi OHTA
  • Publication number: 20090295847
    Abstract: [Problems] There is provided a printing method using an inkjet recording method for printing on non-ink-absorptive and low-ink-absorption recording media that is excellent in terms of image quality, resistance to abrasion, and discharge stability no matter how ink-absorptive recording media used therewith are. [Means for Solving the Problems] A printing method using an inkjet recording method, wherein an ink set includes a chromatic ink, an achromatic ink, and a resin ink; the resin ink contains at least thermoplastic resin particles that are insoluble in water but compatible with water-soluble solvents for resins as well as a water-soluble solvent for resins; the inks all contain a silicon surfactant and an acetylene glycol surfactant that has an HLB value equal to or less than 6; and the printing method includes a step of drying performed during and/or after printing.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 3, 2009
    Inventors: HIROSHI MUKAI, HIDEHIKO KOMATSU, HIROSHI ITO, HITOSHI OHTA
  • Publication number: 20090279357
    Abstract: A nonvolatile semiconductor storage device includes a memory cell array including a plurality of memory cells arranged at intersection positions of word lines and bit lines in a matrix form, and a row decoder including a row sub-decoder to which a lower address for selecting a word line is input, wherein one unit of the row sub-decoder for selecting one word line is constituted of a first transistor of a first conduction type, and a second transistor of a second conduction type, and a gate electrode of each of the first and second transistors is arranged in a direction in which the bit lines are arranged.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 12, 2009
    Inventors: Hitoshi OHTA, Tomohito Kawano, Akira Umezawa
  • Publication number: 20080298126
    Abstract: A non-volatile semiconductor memory includes a memory cell array. The memory cell array includes a plurality of banks, redundant blocks, and special blocks storing management data. Each bank includes a plurality of normal blocks, which include a plurality of electrically rewritable memory cells, the normal block being a minimum unit which is independently erased, and the redundant block configured to replace the normal block and being incapable of replacing the special block. A defective block automatic replacement sequence control circuit controls the replacement operation of the defective block FBLK with the redundant block RBLK in a defective block automatic replacement sequence.
    Type: Application
    Filed: May 29, 2008
    Publication date: December 4, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hitoshi OHTA, Tomohito Kawano
  • Patent number: 7265164
    Abstract: An ink composition for ink jet recording is provided which can realize both good waterfastness of prints and high-quality recorded images on specialty recording media. The ink composition comprises a water-soluble colorant, such as an acid dye, a cationic water-soluble polymer, such as polyallylamine, and an inorganic salt, such as potassium chloride, in combination.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: September 4, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Hidehiko Komatsu, Kazuhiko Kitamura, Hitoshi Ohta
  • Publication number: 20060047013
    Abstract: An aqueous ink composition having high storage stability is provided. The aqueous ink composition of the invention contains a coloring agent, a “dispersing resin containing a repeating unit structure (I) having an unneutralized group and a repeating unit structure (II) having a neutralized group and capable of being hydrated and/or dissolved in water”, a water-soluble organic solvent capable of swelling and/or dissolving the foregoing repeating unit structure (I), and water.
    Type: Application
    Filed: September 25, 2003
    Publication date: March 2, 2006
    Inventors: Hiroshi Ito, Hitoshi Ohta, Hidehiko Komatsu, Daisuke Ishihara, Nagatoshi Kasahara
  • Patent number: 7001935
    Abstract: An ink for ink jet printing process, comprising at least: a particulate pigment having a sulfur-containing dispersibility-imparting group on the surface thereof; a penetrating agent; a resin emulsion comprising a dispersed particulate resin having a sulfur-containing dispersibility-imparting group on the surface thereof; and water.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: February 21, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Hitoshi Ohta, Hidehiko Komatsu, Masahiro Yatake, Kazuhiko Hara
  • Publication number: 20050124726
    Abstract: An aqueous ink ensuring less blurring and high color formation on plain paper, satisfactory color formation and fixing property on special paper and excellent ejection stability is realized by using a microcapsule of a colorant encapsulated with a polymer and rendered dispersible in water and specifying the amount of the aromatic ring in the polymer to be from 20 to 70 wt % of the polymer.
    Type: Application
    Filed: October 17, 2002
    Publication date: June 9, 2005
    Inventors: Masahiro Yatake, Hidehiko Komatsu, Hitoshi Ohta, Kazuhiko Hara, Hiroko Hayashi, Jun Ito, Nagatoshi Kasahara, Keiichi Noto
  • Patent number: 6809128
    Abstract: Disclosed is an ink composition which has good storage stability and, in addition, can yield prints having good waterfastness and lightfastness. The ink composition comprises an alkali-soluble colorant, a water-soluble organic solvent, water, and a cationic water-soluble resin comprising units (a) and units (b1) or units (b2): wherein R1, and R2, which may be the same or different, each represent a C1-5 alkyl group; R3 represents a hydrogen atom or a C1-5 alkyl group; and m and n are each 0, 1, or 2.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: October 26, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Hitoshi Ohta, Kazuhiko Kitamura
  • Patent number: 6802893
    Abstract: An ink for ink jet recording including at least a particulate pigment having a sulfur-containing dispersibility providing group chemically bonded to the pigment surface with a treatment containing sulfur, a penetrating agent and a liquid component including water. In one embodiment, the liquid component includes polyvalent metal ions and has a sulfur content that is 2,000 ppm or less as calculated in terms of SO42−. In other embodiments, the ink has (a) a sulfonic acid anion group or a sulfinic acid anion group and an alkaline metal or monovalent counter ion; (b) a penetrating agent having the formula R—EOn2—POm2—X; and (c) a sulfur-containing dispersibility providing group in an amount of 10×106 equivalent or more per gram of particulate pigment.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: October 12, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Hidehiko Komatsu, Hiroto Nakamura, Masahiro Yatake, Hiroko Hayashi, Makoto Matsuzaki, Fumitsugu Ito, Hitoshi Ohta
  • Patent number: 6720367
    Abstract: A composition, for ink jet recording, containing a cationic, water-soluble resin comprising a repeating unit represented by the following formula (I) can realize an image possessing excellent waterproofness and lightfastness and having no significant feathering or bleeding, especially no significant color-to-color bleeding: wherein R1 and R2 which may be the same or different represent a hydrogen atom or a C1-5 alkyl group, provided that R1 and R2 do not simultaneously represent a hydrogen atom; and n is 0, 1, or 2.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: April 13, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Makoto Taniguchi, Hitoshi Ohta, Kazuhiko Kitamura
  • Patent number: 6689328
    Abstract: In order to improve solid phase diffusion bondability at contact portions between a metal flat foil and a metal corrugated foil together constituting a metal honeycomb body for a catalyst converter used for purifying an exhaust gas and to improve engine durability, the present invention comprises one or combination of the following structures; a structure wherein at least one of the metal foils has a foil thickness of less than 40 &mgr;m; a structure wherein an Al content after bonding is at least 3%; a structure wherein the surface condition of both metal foils in a width-wise direction has a predetermined surface coarseness or a predetermined surface shape and condition; and a structure wherein the width of contact portions between both metal foils is at least five times the thickness of the metal foils.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: February 10, 2004
    Assignee: Nippon Steel Corporation
    Inventors: Tadayuki Otani, Atuhiko Imai, Masayuki Kasuya, Kazutoshi Iwami, Toru Utsumi, Mikio Yamanaka, Hitoshi Ohta, Yoshikuni Tokunaga, Fujio Shimizu, Toshihiro Egami, Tamio Noda
  • Patent number: 6524383
    Abstract: Disclosed is a pigment dispersion that can be used for an ink jet printing-use pigment ink that affords stable printing characteristics and has excellent storage stability in an ink jet printer having a head driven at a high frequency and having finer nozzles in order to enhance image quality and raise the speed. Disclosed is also a method for manufacturing this pigment dispersion. This manufacturing method includes a step of surface-treating a self-dispersing type of pigment, in which at least hydrophilic, dispersibility-imparting group is introduced to the pigment surface directly and/or via a polyvalent group, and a step of dispersing the self-dispersing pigment obtained in said surface-treating step in an aqueous medium, wherein the dispersion step is a step in which at least the self-dispersing pigment, a wetting agent, and water are dispersed in the form of a liquid mixture.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: February 25, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Hidehiko Komatsu, Hiroto Nakamura, Hitoshi Ohta, Masahiro Yatake, Kazuhiko Hara