Patents by Inventor Shigeyuki Iwasa

Shigeyuki Iwasa 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: 20230236210
    Abstract: Provided is a method for sensing methyl salicylate, which is a plant hormone released when a plant is infected with a disease in cultivation of plants including agricultural crops, and thereby provided a method for early in-situ detection of disease infection in a plant. With the present embodiment, disease infection in a plant can be detected at an early stage by utilizing a rare earth compound that selectively recognizes and forms a complex with methyl salicylate, which is a plant hormone released when a plant is infected by a pathogen, as a receptor for sensing, and by utilizing a fluorescence emission phenomenon and a change in electrochemical behavior after the reaction with methyl salicylate.
    Type: Application
    Filed: June 3, 2021
    Publication date: July 27, 2023
    Applicant: NEC Corporation
    Inventors: Katsumi MAEDA, Shigeyuki IWASA
  • Publication number: 20230096785
    Abstract: Disease infection in a plant can be detected at an early stage by utilizing a boron-oxygen compound having a specific structure that selectively recognizes and forms a complex with methyl salicylate, which is a plant hormone released when a plant is infected by a pathogen, as a receptor for sensing, and by utilizing a fluorescence emission phenomenon and a change in electrochemical behavior after the reaction with methyl salicylate.
    Type: Application
    Filed: January 25, 2021
    Publication date: March 30, 2023
    Applicant: NEC Corporation
    Inventors: Katsumi Maeda, Shigeyuki Iwasa
  • Publication number: 20210273226
    Abstract: In order to provide an organic radical battery having excellent high power, discharge characteristics at a high current, and cycle characteristics, an electrode having a repeating unit having a nitroxide radical site represented by formula (1-a) and a repeating unit having a carboxyl group represented by formula (1-b) in a range in which x satisfies 0.1 to 10 and using a copolymer having a cross-linked structure as an electrode active material is used for the organic radical battery. (wherein in Formulas (1-a) and (1-b), R1 and R2 each independently represent hydrogen or a methyl group; and x represents a mol % of Formula (1-b) in the total 100 mol % of Formulas (1-a) and (1-b).
    Type: Application
    Filed: July 19, 2019
    Publication date: September 2, 2021
    Applicant: NEC Corporation
    Inventors: Shigeyuki IWASA, Takanori NISHI, Momotaro TAKEDA, Hideharu IWASAKI
  • Publication number: 20190386309
    Abstract: In order to provide an organic radical battery excellent in the high output performance and the discharge characteristic at large currents, an electrode using, as an electrode active material, a copolymer having a repeating unit having a nitroxide radical site represented by the formula (1-a) and a repeating unit having carboxy-lithium represented by the formula (1-b) in the range of x satisfying 0.1 to 10 is used for the organic radical battery.
    Type: Application
    Filed: January 19, 2018
    Publication date: December 19, 2019
    Applicants: NEC Corporation, Kuraray Co., Ltd.
    Inventors: Shigeyuki IWASA, Takanori NISHI, Hideharu IWASAKI, Jun-Sang CHO
  • Publication number: 20190386308
    Abstract: In order to provide an organic radical battery excellent in the high output performance and the discharge characteristic at large currents, an electrode using, as an electrode active material, a copolymer having a repeating unit having a nitroxide radical site represented by the following formula (1-a) and a repeating unit having an ethylene oxide chain represented by the following formula (1-b) in the range of a satisfying 0.1 to 10 is used for the organic radical battery.
    Type: Application
    Filed: January 19, 2018
    Publication date: December 19, 2019
    Applicant: NEC Corporation
    Inventor: Shigeyuki IWASA
  • Patent number: 10497978
    Abstract: A secondary battery exhibiting high charge and discharge rate characteristics can be provided, by making the secondary battery have a cathode including a nitroxyl compound taking a nitroxyl cation substructure represented by the following formula (1) in an oxidized state and a nitroxyl radical substructure represented by the following formula (2) in a reduced state, an anode including an active material capable of reversibly intercalating and deintercalating a lithium ion, and an electrolyte solution including a lithium salt and an aprotic organic solvent, and employing Li[(FSO2)2N] as the lithium salt:
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: December 3, 2019
    Assignee: NEC Corporation
    Inventors: Terumasa Shimoyama, Takanori Nishi, Shigeyuki Iwasa, Katsumi Maeda
  • Publication number: 20180115018
    Abstract: A secondary battery exhibiting high charge and discharge rate characteristics can be provided, by making the secondary battery have a cathode including a nitroxyl compound taking a nitroxyl cation substructure represented by the following formula (1) in an oxidized state and a nitroxyl radical substructure represented by the following formula (2) in a reduced state, an anode including an active material capable of reversibly intercalating and deintercalating a lithium ion, and an electrolyte solution including a lithium salt and an aprotic organic solvent, and employing Li[(FSO2)2N] as the lithium salt:
    Type: Application
    Filed: February 23, 2016
    Publication date: April 26, 2018
    Applicant: NEC Corporation
    Inventors: Terumasa SHIMOYAMA, Takanori NISHI, Shigeyuki IWASA, Katsumi MAEDA
  • Patent number: 9647269
    Abstract: In a secondary battery utilizing redox by a radical site, charge-discharge is carried out in such a manner that a lithium ion moves between a positive electrode and a negative electrode (rocking chair-type). An anion in an amount necessary for electrode doping during charge-discharge is made unnecessary, thereby reducing the amount of an electrolytic solution. A secondary battery with a large energy density is achieved. Provided is an electrode active material including at least one polymer including a radical site capable of being converted into a first cation, and an anion site capable of being bonded with the first cation or a second cation.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: May 9, 2017
    Assignee: NEC Corporation
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Hiroki Yakushiji, Shigeyuki Iwasa, Kentaro Nakahara
  • Patent number: 9443661
    Abstract: An object of the present invention is to provide a power storage device with excellent cycle property, employing a cathode containing a nitroxyl polymer. To attain the object in the present invention, in the power storage device employing a cathode comprising a nitroxyl polymer, a lithium or lithium alloy anode is used as an anode active material and the cathode is in direct contact with the anode.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: September 13, 2016
    Assignee: NEC CORPORATION
    Inventors: Kentaro Nakahara, Jiro Iriyama, Shigeyuki Iwasa, Masahiro Suguro, Masaharu Satoh
  • Patent number: 9356292
    Abstract: The present invention provides a radical composition capable of suppressing elution of electrode components in an electrolyte solution when used in an electrode for a secondary battery, and a battery using the radical composition. The present invention relates to a radical composition including a pyrroline nitroxide polymer and polyethylene glycols.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: May 31, 2016
    Assignees: SUMITOMO SEIKA CHEMICALS CO., LTD., NEC CORPORATION
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Sosuke Yamaguchi, Nobutaka Fujimoto, Yuji Kinpara, Shun Hashimoto, Shigeyuki Iwasa, Kentaro Nakahara
  • Patent number: 9287533
    Abstract: A non-aqueous secondary battery includes: a positive-electrode collector layer; a positive-electrode layer formed on one surface of the positive-electrode collector layer; a negative-electrode collector layer; a negative-electrode layer formed on one surface of the negative-electrode collector layer so as to be opposed to the positive-electrode layer; a separator provided between the positive-electrode layer and the negative-electrode layer; and a positive-electrode-side insulating layer and a negative-electrode-side insulating layer respectively formed on another surface of the positive-electrode collector layer and another surface of the negative-electrode collector layer. Circumferential inner surfaces of peripheral edges of the positive-electrode collector layer and the negative-electrode collector layer are joined with a sealing agent including at least a positive-electrode fusion layer, a gas barrier layer, and a negative-electrode fusion layer.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: March 15, 2016
    Assignee: NEC CORPORATION
    Inventors: Hiroshi Kajitani, Kentaro Nakahara, Takanori Nishi, Shigeyuki Iwasa, Haruyuki Yoshigahara, Yoichi Shimizu
  • Publication number: 20150183912
    Abstract: A photoresist material for lithography using a light of 220 nm or less which comprises at least a polymer represented by the following formula (2) and a photo-acid generator for generating an acid by exposure: wherein R1, R2, R3 and R5 are each a hydrogen atom or a methyl group; R4 is an acid-labile group or one of a specified subset of alicyclic hydrocarbon groups, alicyclic hydrocarbon groups, or hydrocarbon groups; R6 is a hydrogen atom or one of a specified subset of hydrocarbon groups or alicyclic hydrocarbon groups; x, y and z are optional values which meet x+y+z=1, 0<x?1, 0?y<1 and 0?z<1. Also disclosed is a resin having a (meth)acrylate unit of an alicyclic lactone structure represented by the formula (3): wherein R8 is a hydrogen atom or a methyl group, and R9 is one of a specified subset of hydrocarbon groups.
    Type: Application
    Filed: August 11, 2014
    Publication date: July 2, 2015
    Applicant: NEC Corporation
    Inventors: Katsumi MAEDA, Shigeyuki IWASA, Kaichiro NAKANO, Etsuo HASEGAWA
  • Patent number: 8969483
    Abstract: A photoresist material comprising a polymer with at least two acrylate derivatives incorporated therein, and a photo-acid generator for generating an acid by exposure, wherein at least one of the two acrylate derivatives incorporated therein comprises a norbornyl moiety having a lactone structure, and at least one of the two acrylate derivatives comprises an ester-substituted tetracyclododecyl moiety.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: March 3, 2015
    Assignee: NEC Corporation
    Inventors: Katsumi Maeda, Shigeyuki Iwasa, Kaichiro Nakano, Etsuo Hasegawa
  • Patent number: 8802783
    Abstract: A photoresist material comprising a polymer with at least two acrylate derivatives incorporated therein, and a photo-acid generator for generating an acid by exposure, wherein at least one of the two acrylate derivatives incorporated therein comprises a norbornyl moiety having a lactone structure, and at least one of the two acrylate derivatives comprises an ester-substituted tetracyclododecyl moiety.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: August 12, 2014
    Assignee: NEC Corporation
    Inventors: Katsumi Maeda, Shigeyuki Iwasa, Kaichiro Nakano, Etsuo Hasegawa
  • Patent number: 8802798
    Abstract: A photoresist material for lithography using a light of 220 nm or less which comprises at least a polymer represented by the following formula (2) and a photo-acid generator for generating an acid by exposure: wherein R1, R2, R3 and R5 are each a hydrogen atom or a methyl group; R4 is an acid-labile group or one of a specified subset of alicyclic hydrocarbon groups, alicyclic hydrocarbon groups, or hydrocarbon groups; R6 is a hydrogen atom or one of a specified subset of hydrocarbon groups or alicyclic hydrocarbon groups; x, y and z are optional values which meet x+y+z=1, 0<x?1, 0?y<1 and 0?z<1. Also disclosed is a resin having a (meth)acrylate unit of an alicyclic lactone structure represented by the formula (3): wherein R8 is a hydrogen atom or a methyl group, and R9 is one of a specified subset of hydrocarbon groups.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: August 12, 2014
    Assignee: NEC Corporation
    Inventors: Katsumi Maeda, Shigeyuki Iwasa, Kaichiro Nakano, Etsuo Hasegawa
  • Patent number: 8728662
    Abstract: Disclosed is a polyradical compound which can be used as an electrode active material for at least one of a positive electrode and a negative electrode. The polyradical compound has a repeating unit represented by general formula (1) and is crosslinked using a bifunctional crosslinking agent having two polymerizing groups in the molecule represented by general formula (2), wherein R1 to R3 each independently represent hydrogen or methyl group; R4 to R7 each independently represent C1 to C3 alkyl group; X represents single bond, linear, branched or cyclic C1 to C15 alkylenedioxy group, alkylene group, phenylenedioxy group, phenylene group or structure represented by general formula (3); and R8 to R13 each independently represent hydrogen or methyl group, and k represents an integer of 2 to 5.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: May 20, 2014
    Assignee: NEC Corporation
    Inventors: Masahiro Suguro, Shigeyuki Iwasa, Yuki Kusachi, Jiro Iriyama, Yukiko Morioka, Kentaro Nakahara, Sadahiko Miura
  • Publication number: 20140087235
    Abstract: A layered structure includes a configuration in which non-aqueous secondary batteries are layered. Each non-aqueous secondary battery includes: a positive-electrode collector layer; a positive-electrode layer formed on one surface of the positive-electrode collector layer; a negative-electrode collector layer; a negative-electrode layer formed on one surface of the negative-electrode collector layer so as to be opposed to the positive-electrode layer; a separator containing an electrolytic solution provided between the positive-electrode layer and the negative-electrode layer; a positive-electrode-side insulating layer formed on another surface of the positive-electrode collector layer; and a negative-electrode-side insulating layer formed on another surface of the negative-electrode collector layer. Two non-aqueous secondary batteries share one negative-electrode-side insulating layer.
    Type: Application
    Filed: May 10, 2012
    Publication date: March 27, 2014
    Inventors: Hiroshi Kajitani, Kentaro Nakahara, Takanori Nishi, Shigeyuki Iwasa, Hiroshi Kato, Yoichi Shimizu, Haruyuki Yoshigahara
  • Publication number: 20140079984
    Abstract: A non-aqueous secondary battery includes: a positive-electrode collector layer; a positive-electrode layer formed on one surface of the positive-electrode collector layer; a negative-electrode collector layer; a negative-electrode layer formed on one surface of the negative-electrode collector layer so as to be opposed to the positive-electrode layer; a separator provided between the positive-electrode layer and the negative-electrode layer; and a positive-electrode-side insulating layer and a negative-electrode-side insulating layer respectively formed on another surface of the positive-electrode collector layer and another surface of the negative-electrode collector layer. Circumferential inner surfaces of peripheral edges of the positive-electrode collector layer and the negative-electrode collector layer are joined with a sealing agent including at least a positive-electrode fusion layer, a gas barrier layer, and a negative-electrode fusion layer.
    Type: Application
    Filed: May 10, 2012
    Publication date: March 20, 2014
    Inventors: Hiroshi Kajitani, Kentaro Nakahara, Takanori Nishi, Shigeyuki Iwasa, Haruyuki Yoshigahara, Yoichi Shimizu
  • Publication number: 20140061532
    Abstract: The present invention provides a radical composition capable of suppressing elution of electrode components in an electrolyte solution when used in an electrode for a secondary battery, and a battery using the radical composition. The present invention relates to a radical composition including a pyrroline nitroxide polymer and polyethylene glycols.
    Type: Application
    Filed: March 23, 2012
    Publication date: March 6, 2014
    Applicants: WASEDA UNIVERSITY, NEC CORPORATION, SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Sosuke Yamaguchi, Nobutaka Fujimoto, Yuji Kinpara, Shun Hashimoto, Shigeyuki Iwasa, Kentaro Nakahara
  • Publication number: 20140057167
    Abstract: A secondary battery using a polymer radical material and a conducting additive in which the performance of a conductive auxiliary layer is further improved and the internal resistance is reduced, thereby achieving a higher output. Specifically disclosed is a secondary battery in which at least one of a positive electrode and a negative electrode uses, as an electrode active material, a polymer radical material and a conducting additive having electrical conductivity. By providing a conductive auxiliary layer between a current collector and the polymer radical material/conducting additive electrode which is mainly composed of graphite, fibrous carbon or a granular carbon having a DBP absorption of not more than 110 cm3/100 g, the secondary battery with a higher output can be obtained.
    Type: Application
    Filed: October 31, 2013
    Publication date: February 27, 2014
    Applicants: NEC CORPORATION, DIC CORPORATION
    Inventors: Masanori KASAI, Hiroshi Isozumi, Takayoshi Obata, Shigeyuki Iwasa, Kentaro Nakahara, Masahiro Suguro