Patents by Inventor Kei Sakamoto

Kei Sakamoto 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: 8883271
    Abstract: The present invention is to provide a novel polymerizable chiral compound (chiral agent) having high left-handed helical twisting power, a polymerizable liquid crystal composition comprising the polymerizable chiral compound and a polymerizable liquid crystal compound, a liquid crystal polymer, and an optically anisotropic body.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: November 11, 2014
    Assignee: Zeon Corporation
    Inventors: Kei Sakamoto, Kentaro Tamura, Kumi Okuyama
  • Patent number: 8883888
    Abstract: There are provided a novel diarylamine compound represented by the following formula (I), (II) or (III), which has at least one signal attributable to the hydrogen of the N—H moiety at 8.30 ppm to 9.00 ppm when a deuterated dimethyl sulfoxide solution of the diarylamine compound is analyzed by 1H-NMR; and an aging inhibitor, a polymer composition, a crosslinked rubber product and a molded article thereof, and a method of producing a diarylamine compound. In the formulas, A1 to A6 each represent an aromatic group which may have a substituent; A represents an aromatic group or a cyclic aliphatic group, which may both have a substituent; L represents 1 or 2; and n represents 0 or 1.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: November 11, 2014
    Assignee: Zeon Corporation
    Inventors: Kei Sakamoto, Tomonori Ogawa, Satoshi Kiriki, Masanobu Shinohara, Yasushi Nakano
  • Patent number: 8871977
    Abstract: Disclosed are a novel asymmetric azine compound (I) and a method for producing an asymmetric azine compound (I) which is characterized in that an aldehyde compound (III) and hydrazine are reacted in an alcohol solvent at a molar ratio (aldehyde compound (III)):(hydrazine) of from 2:1 to 1:2, thereby obtaining a reaction solution including a hydrazone compound (IV), and then an aldehyde compound (V) is added for a reaction into the thus-obtained reaction solution at a molar ratio (aldehyde compound (V)):(hydrazone compound (IV)) of from 2:1 to 1:2. The method can commercially advantageously produce an asymmetric azine compound having a polar group such as a hydroxyl group or a carboxyl group in each molecule. The novel asymmetric azine compound can be obtained by this production method. (In the formulae, R1 and R2 each represents a hydroxyl group or a carboxyl group, X1 to X8 each represents a hydrogen atom, —C(?O)—OR3 or the like; and R3 represents an alkyl group having 1 to 10 carbon atoms or the like.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: October 28, 2014
    Assignee: Zeon Corporation
    Inventors: Kei Sakamoto, Yasushi Nakano
  • Publication number: 20140309396
    Abstract: The invention is a polymerizable compound represented by formula (I); a polymerizable composition comprising the polymerizable compound and an initiator; a polymer obtained by polymerizing the polymerizable compound or the polymerizable composition, and an optically anisotropic article comprising the polymer. In the formula, Q1 to Q3 are a hydrogen atom, and the like; X is a C4-12 divalent aromatic group, and the like; Y1 to Y12 are a chemical single bond, —O—, —O—C(?O)—, —C(?O)—O—, and the like; G1 to G4 are a C1-20 divalent aliphatic group, and the like; Z1 to Z4 are a C2-10 alkenyl group, and the like; A1 is a trivalent aromatic group, and the like; A2 to A7 are a C4-30 divalent aromatic group, and the like; and n is 0 or 1.
    Type: Application
    Filed: June 14, 2012
    Publication date: October 16, 2014
    Applicant: ZEON CORPORATION
    Inventors: Kei Sakamoto, Kumi Okuyama
  • Publication number: 20140235857
    Abstract: The present invention pertains to a compound represented by a formula (I) and a method for producing thereof (in the formula, Ax is an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from a group consisting of an aromatic hydrocarbon ring and an aromatic hetero ring, Ay is a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, a cycloalkyl group, an alkenyl group having 2 to 18 carbon atoms, an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from a group consisting of an aromatic hydrocarbon ring and an aromatic hetero ring, or the like. Ax and Ay optionally bond to each other to form a ring, and Q is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or the like.).
    Type: Application
    Filed: April 27, 2012
    Publication date: August 21, 2014
    Applicant: ZEON CORPORATION
    Inventors: Kei Sakamoto, Kumi Okuyama, Yasushi Nakano
  • Publication number: 20140200320
    Abstract: The present invention provides a polymerizable compound represented by the following formula (I), a polymerizable composition that includes the polymerizable compound and an initiator, a polymer obtained by polymerizing the polymerizable compound or the polymerizable composition, and an optically anisotropic article that includes the polymer. The invention makes it possible to provide a polymerizable compound, a polymerizable composition, and a polymer that have a practical low melting point, exhibit an excellent solubility in a general-purpose solvent, can be produced at low cost, and may produce an optical film that achieves uniform conversion of polarized light over a wide wavelength band, and an optically anisotropic article.
    Type: Application
    Filed: May 31, 2012
    Publication date: July 17, 2014
    Applicant: ZEON CORPORATION
    Inventors: Kei Sakamoto, Kumi Okuyama
  • Publication number: 20140142266
    Abstract: The present invention relates to a polymerizable compound represented by a formula (I). The present invention provides a polymerizable compound, a polymerizable composition, a polymer, and an optically anisotropic article that are capable of obtaining an optical film having a low melting point, having excellent solubility, capable of being manufactured at low cost, and capable of uniform polarized light conversion across a broad wavelength region. [In formula: Y1 to Y6 are independently a chemical single bond, —O—, —O—C(?O)—, —C(?O)—O— etc.; G1 and G2 are independently a divalent C1-C20 aliphatic group etc.; Z1 and Z2 are independently C2-C10 alkenyl group that is substituted with a halogen atom etc.; Ax is a C2-C30 organic group that includes at least one aromatic ring selected from a group consisting of an aromatic hydrocarbon ring and an aromatic hetero ring; Ay is a hydrogen atom, a C1-C20 alkyl group, a C2-C20 alkenyl group, a C3-C12 cycloalkyl group etc.; A1 is a trivalent aromatic group etc.
    Type: Application
    Filed: April 27, 2012
    Publication date: May 22, 2014
    Applicant: ZEON CORPORATION
    Inventors: Kei Sakamoto, Kumi Okuyama
  • Publication number: 20140107247
    Abstract: The invention provides a polymerizable compound represented by formula (I), a polymerizable composition, and a polymer that have a practical low melting point, can be produced at low cost, and can produce an optical film that achieves uniform conversion of polarized light over a wide wavelength band, and an optically anisotropic article.
    Type: Application
    Filed: April 12, 2012
    Publication date: April 17, 2014
    Applicant: ZEON CORPORATION
    Inventors: Kei Sakamoto, Kumi Okuyama
  • Publication number: 20140078813
    Abstract: A nonvolatile semiconductor memory device includes a memory cell array including memory cells having a variable resistance element provided at intersections of crossing first and second lines, the memory cell array including third lines, fourth and fifth lines, and first and second diodes; and a control circuit which, when the memory cells include a selected memory cell, a selected first line connected to the selected memory cell and an unselected first line, and a selected second line connected to the selected memory cell and an unselected second line, supplies a first voltage to the selected first line, and supplies a second voltage to the unselected first line, and when the third lines include a selected third line electrically connected to the selected second line via one of the fourth line and a first diode, supplies a third voltage to the selected fourth line.
    Type: Application
    Filed: November 21, 2013
    Publication date: March 20, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Kei SAKAMOTO
  • Publication number: 20140003128
    Abstract: A semiconductor memory device according to an embodiment includes: a memory cell array including a plurality of first lines, a plurality of second lines, and memory cells disposed at each of intersections of the first lines and the second lines; and a control circuit configured to apply a first voltage to a selected first line, apply a second voltage having a voltage value which is smaller than that of the first voltage to a selected second line, and apply a third voltage and a fourth voltage to a non-selected first line and a non-selected second line, respectively. The control circuit is configured to apply a fifth voltage to one of the non-selected first lines that is adjacent to the selected first line, and apply a sixth voltage to one of the non-selected second lines that is adjacent to the selected second line.
    Type: Application
    Filed: February 27, 2013
    Publication date: January 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kei SAKAMOTO, Masaki KONDO, Nobuaki YASUTAKE, Takayuki OKAMURA
  • Publication number: 20140003127
    Abstract: A semiconductor memory device according to an embodiment includes a memory cell array including memory cells, the memory cells each configured having a current rectifier element and a variable resistance element connected in series therein. Each of the memory cells has formed on aside surface thereof: a first insulating film provided on aside surface of the current rectifier element and the variable resistance element and having a composition ratio of anon-silicon element to silicon which is a first value; a silicon oxide film provided on a side surface of the first insulating film; and a second insulating film provided on aside surface of the silicon oxide film and having a composition ratio of a non-silicon element to silicon which is a second value. The first value is smaller than the second value.
    Type: Application
    Filed: February 27, 2013
    Publication date: January 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kei Sakamoto, Takayuki Okamura, Nobuaki Yasutake, Jun Nishimura
  • Patent number: 8619461
    Abstract: A nonvolatile semiconductor memory device includes a memory cell array including cells provided at each of intersections of first and second lines and each having a variable resistance element and a first diode connected in series; a first line control circuit for supplying voltages to the first lines; and a second line control circuit for supplying voltages to the second lines, the cells each having one of the second lines connected to an anode side of the first diode and one of the first lines connected to a cathode side of the first diode, and the memory cell array including a second diode inserted in each of the second lines between the second line control circuit and the cells and each having a side of the second line control circuit as an anode and a side of the cells as a cathode.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: December 31, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kei Sakamoto
  • Patent number: 8609753
    Abstract: An acrylic rubber composition which contains, with respect to 100 parts by weight of acrylic rubber, a compound which is expressed by the following general formula (1) in 0.1 to 50 parts by weight and a cross-linking agent in 0.05 to 20 parts by weight is provided. (where, in said general formula (1), Y indicates a chemical single bond or —SO2—. Ra and Rb respectively independently indicate substitutable C1 to C30 organic groups. Za and Zb respectively independently indicate chemical single bonds or —SO2—. n and m respectively independently are 0 or 1, at least one of n and m being 1).
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: December 17, 2013
    Assignee: Zeon Corporation
    Inventors: Tomonori Ogawa, Masanobu Shinohara, Tsutomu Yoshimura, Kei Sakamoto, Satoshi Kiriki
  • Patent number: 8603357
    Abstract: The present inventions to provide a novel polymerizable chiral compound (chiral agent) having high helical twisting power, a polymerizable liquid crystal composition comprising the polymerizable chiral compound and a polymerizable liquid crystal compound, a liquid crystal polymer, and an optically anisotropic body.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: December 10, 2013
    Assignee: Zeon Corporation
    Inventors: Kei Sakamoto, Kentaro Tamura
  • Publication number: 20130230768
    Abstract: A binder composition for a non-aqueous battery electrode containing a binder and an ether compound represented by the formula (1), and an electrolyte solution composition for a non-aqueous battery containing an ether compound represented by the formula (1), wherein m and n each independently represent 0 or 1, and R1 represents a divalent linear hydrocarbon group which may have in the bond thereof one or more intervening groups selected from the group consisting of an oxygen atom, a sulfur atom, and a carbonyl group.
    Type: Application
    Filed: June 28, 2011
    Publication date: September 5, 2013
    Applicant: ZEON CORPORATION
    Inventors: Kei Sakamoto, Natsuko Nakata, Yasuhiro Wakizaka
  • Patent number: 8454857
    Abstract: A polymerizable liquid crystal compound shown by the following formula, a polymerizable liquid crystal composition that includes the polymerizable liquid crystal compound and a chiral compound polymerizable with the polymerizable liquid crystal compound, a liquid crystalline polymer obtained by polymerizing the polymerizable liquid crystal compound or the polymerizable liquid crystal composition, and an optically anisotropic article that includes the liquid crystalline polymer, are disclosed.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: June 4, 2013
    Assignee: Zeon Corporation
    Inventors: Kei Sakamoto, Yasushi Nakano
  • Publication number: 20130130102
    Abstract: An ether compound represented by the following formula and its use: wherein n represents 0 or 1, m represents an integer of 0 to 2, Y represents —O—, —S—, —C(?O)—O—, and —O—C(?O)—, X1 and X2 represent a hydrogen atom or a fluorine atom, and R represents an aliphatic hydrocarbon group having 1 to 20 carbon atoms and substituted with one or more fluorine atoms, with a proviso that, when m is 0, R has 3 to 20 carbon atoms. R may have in the bond thereof intervening oxygen atom, sulfur atom, and carbonyl group.
    Type: Application
    Filed: July 22, 2011
    Publication date: May 23, 2013
    Applicant: ZEON CORPORATION
    Inventors: Kei Sakamoto, Natsuko Nakata, Kumi Okuyama
  • Publication number: 20130077380
    Abstract: A nonvolatile semiconductor memory device includes a memory cell array including cells provided at each of intersections of first and second lines and each having a variable resistance element and a first diode connected in series; a first line control circuit for supplying voltages to the first lines; and a second line control circuit for supplying voltages to the second lines, the cells each having one of the second lines connected to an anode side of the first diode and one of the first lines connected to a cathode side of the first diode, and the memory cell array including a second diode inserted in each of the second lines between the second line control circuit and the cells and each having a side of the second line control circuit as an anode and a side of the cells as a cathode.
    Type: Application
    Filed: August 27, 2012
    Publication date: March 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Kei SAKAMOTO
  • Patent number: 8405712
    Abstract: A gesture recognition apparatus including a detector, a controller and a gesture recognizer, and is able to detect a portion to be detected using an image captured at a first resolution without reducing the number of images to be entered per unit of time to an object detector by detecting an auxiliary portion instead when the portion to be detected is not detected at a second resolution, estimating the position of the auxiliary portion based on the position of the auxiliary portion, and extracting the periphery thereof from the image captured at the first resolution.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: March 26, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsukasa Ike, Yasukazu Okamoto, Satoru Ishigaki, Kei Sakamoto, Masahiro Fujita, Hisashi Kazama
  • Publication number: 20130023637
    Abstract: The present invention is to provide a novel polymerizable chiral compound (chiral agent) having high left-handed helical twisting power, a polymerizable liquid crystal composition comprising the polymerizable chiral compound and a polymerizable liquid crystal compound, a liquid crystal polymer, and an optically anisotropic body.
    Type: Application
    Filed: March 10, 2011
    Publication date: January 24, 2013
    Applicant: ZEON CORPORATION
    Inventors: Kei Sakamoto, Kentaro Tamura, Kumi Okuyama