Patents by Inventor Akihiko Matsuyama

Akihiko Matsuyama 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: 20190309204
    Abstract: [Problem] Provided are a high filler-loaded high thermal conductive material which sufficiently utilizes features of an organic polymer while ameliorating drawbacks, enables integrated molding with ceramics, metals, semiconductor elements and the like, and has a low coefficient of thermal expansion and a high thermal conductivity; and a method for producing the high filler-loaded high thermal conductive material, a composition, coating liquid and a molded article.
    Type: Application
    Filed: January 10, 2019
    Publication date: October 10, 2019
    Applicant: Takagi Chemicals, Inc.
    Inventors: Noriaki Takagi, Yuusuke Nagatani, Yuuta Terao, Kazuo Matsuyama, Tsutomu Takeichi, Akihiko Matsumoto
  • Publication number: 20190249020
    Abstract: An ink comprises a pigment, a quinacridone derivative represented by the following Chemical formula 1. where R1, R2, R3, and R4 each, independently represent hydrogen atoms, halogen atoms, or alkyl groups having 1 to 4 carbon atoms. R5 and R6 each, independently represent alkyl groups having 1 to 4 carbon atoms, and m and n each, independently represent 0, 1, or 2, excluding a case where both m and n are simultaneously 0, and a solvent A having an SP value of from 9.0 to 11.0, wherein the proportion of the solvent A in the ink is less than 10 percent by mass.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 15, 2019
    Inventors: Akihiko MATSUYAMA, Yuuki Yokohama, Amika Sagara, Masaki Kudo, Kazuhiko Umemura, Yukihiro Imanaga, Mayumi Yoshihara
  • Patent number: 10370548
    Abstract: A copolymer including a structural unit represented by General Formula (1) below, and a structural unit represented by General Formula (2) below, where, in General Formula (1), R1 is a hydrogen atom or a methyl group, L1 is an alkylene group having 2 or greater carbon atoms but 5 or less carbon atoms, and X is a hydrogen atom or a cation, where, in General Formula (2), R2 is a hydrogen atom or a methyl group and L2 is an alkylene group having 2 or greater carbon atoms but 18 or less carbon atoms.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: August 6, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeyuki Harada, Akihiko Matsuyama, Yoshiki Yanagawa, Masayuki Fukuoka, Takuya Yamazaki, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu
  • Publication number: 20190185690
    Abstract: An ink includes at least one polyether-modified siloxane compound, and at least one aliphatic alcohol alkylene oxide compound. The mass ratio of the polyether-modified siloxane compound to the aliphatic alcohol alkylene oxide compound in the ink is from 95/5 to 50/50.
    Type: Application
    Filed: October 24, 2018
    Publication date: June 20, 2019
    Inventors: Kazuhiko UMEMURA, Yuuki YOKOHAMA, Akihiko MATSUYAMA, Amika SAGARA, Masaki KUDO, Mayumi YOSHIHARA, Kento SUGITA
  • Publication number: 20190136076
    Abstract: Ink includes water, a coloring material, and a copolymer including a first structure unit represented by the following Chemical formula 1 and a second structure unit including an anionic group. In the Chemical formula, R represents a hydrogen atom or a methyl group, X represents an alkylene group having 2-4 carbon atoms, and Y represents a substituted or non-substituted straight-chain alkylene group having 5 to 7 carbon atoms.
    Type: Application
    Filed: January 8, 2019
    Publication date: May 9, 2019
    Inventors: Yuusuke Koizuka, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Akihiko Matsuyama, Yoshiki Yanagawa, Koichiro Oyama, Takuya Yamazaki, Akiyoshi Sabu
  • Patent number: 10280321
    Abstract: An ink includes a pigment, a wax, a water soluble solvent including a solvent having an SP value of from 9.0 to 11.0, and water, wherein the mass ratio of the content of the wax in the ink to the content of the solvent having an SP value of from 9.0 to 11.0 is in a range of from 1.0:2.5 to 1.0:25.0.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: May 7, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Matsuyama, Hiroshi Gotou, Michihiko Namba, Hidetoshi Fujii, Amika Sagara, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Yoshiki Yanagawa, Akiyoshi Sabu, Yuusuke Koizuka, Masayuki Fukuoka, Takuya Yamazaki
  • Patent number: 10273373
    Abstract: Provided is an ink containing water, a coloring material, and a copolymer, wherein the copolymer contains a structural unit represented by any one of general formulae (1a), (1b), and (1c) below and a structural unit containing an anionic group, where R1 represents a hydrogen atom or a methyl group, a represents an integer of from 6 through 10, and b represents an integer of 0 or 1, where R2 represents a hydrogen atom or a methyl group, c represents an integer of 3 or 4, and d represents an integer of 0 or 1, where R3 represents a hydrogen atom or a methyl group and e represents an integer of from 2 through 10.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: April 30, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuusuke Koizuka, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Koichiro Oyama, Takuya Yamazaki, Akiyoshi Sabu, Yoshiki Yanagawa, Akihiko Matsuyama
  • Patent number: 10233341
    Abstract: Ink includes water, a coloring material, and a copolymer including a first structure unit represented by the following Chemical formula 1 and a second structure unit including an anionic group. In the Chemical formula, R represents a hydrogen atom or a methyl group, X represents an alkylene group having 2-4 carbon atoms, and Y represents a substituted or non-substituted straight-chain alkylene group having 5 to 7 carbon atoms.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: March 19, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuusuke Koizuka, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Akihiko Matsuyama, Yoshiki Yanagawa, Koichiro Oyama, Takuya Yamazaki, Akiyoshi Sabu
  • Patent number: 10113078
    Abstract: An ink discharge device including an ink, an ink discharge head, and a negative pressure generator is provided. The ink comprises water, a colorant, an organic solvent X having a solubility parameter of from 8.9 to 12.0 and comprising no glycol ether compound, and a copolymer comprising a structural unit represented by the following formula (1): where R1 represents a hydrogen atom or methyl group and Y represents an alkylene group having 2 to 18 carbon atoms. The ink discharge head includes a nozzle to discharge the ink, a plurality of individual liquid chambers in communication with the nozzle, a flow-in channel to let the ink flow into the individual liquid chambers, and a flow-out channel to let the ink flow out from the individual liquid chambers. The negative pressure generator is configured to generate a negative pressure that lets the ink flow out from the individual liquid chambers.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: October 30, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Keita Katoh, Hiroshi Gotou, Takahiro Yoshida, Akihiko Matsuyama, Masahiko Ishikawa, Yoshiki Yanagawa
  • Patent number: 10000656
    Abstract: An ink includes a pigment a quinacridone compound represented by Chemical formula 1, and a copolymer including the structure unit represented by Chemical formula 2 or Chemical formula 3. In Chemical formula 1, R1, R2, R3, and R4 each, independently represent hydrogen atoms, halogen atoms, or alkyl groups having 1-4 carbon atoms, R5, R6, and R7 each, independently represent alkyl groups having 1-4 carbon atoms or alkylene groups having 1-4 carbon atoms, and m represents 1 or 2, In Chemical formula 2, R8 represents a hydrogen atom or a methyl group and L1 represents an alkylene group having 2-16 carbon atoms, In Chemical formula 3, R9 represents a hydrogen atom or a methyl group, L2 represents a single bond or —(CH2)n—O— and n represents an integer of 2-16.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: June 19, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshiki Yanagawa, Akihiko Matsuyama, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Akiyoshi Sabu, Yuusuke Koizuka, Koichiro Oyama, Takuya Yamazaki
  • Patent number: 9988543
    Abstract: Provided is an ink containing a copper phthalocyanine pigment, wherein an absorbance ratio (Y/X) of a local minimum absorbance Y of the ink in a wavelength range of from 665 nm through 675 nm to a local maximum absorbance X of the ink in a wavelength range of from 610 nm through 620 nm is 0.660 or greater but 0.740 or less.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: June 5, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Matsuyama, Shigeyuki Harada, Yoshiki Yanagawa, Masayuki Fukuoka, Takuya Yamazaki, Kazukiyo Nagai, Tomoyuki Shimada, Akiyoshi Sabu, Yuusuke Koizuka
  • Publication number: 20180105711
    Abstract: An ink discharge device including an ink, an ink discharge head, and a negative pressure generator is provided. The ink comprises water, a colorant, an organic solvent X having a solubility parameter of from 8.9 to 12.0 and comprising no glycol ether compound, and a copolymer comprising a structural unit represented by the following formula (1): where R1 represents a hydrogen atom or methyl group and Y represents an alkylene group having 2 to 18 carbon atoms. The ink discharge head includes a nozzle to discharge the ink, a plurality of individual liquid chambers in communication with the nozzle, a flow-in channel to let the ink flow into the individual liquid chambers, and a flow-out channel to let the ink flow out from the individual liquid chambers. The negative pressure generator is configured to generate a negative pressure that lets the ink flow out from the individual liquid chambers.
    Type: Application
    Filed: October 13, 2017
    Publication date: April 19, 2018
    Inventors: Keita KATOH, Hiroshi Gotou, Takahiro Yoshida, Akihiko Matsuyama, Masahiko Ishikawa, Yoshiki Yanagawa
  • Patent number: 9896530
    Abstract: A copolymer including a structural unit represented by General Formula (1) below and a structural unit represented by General Formula (2) below, where, in General Formula (1), R is a hydrogen atom or a methyl group and X is a hydrogen atom or a cation, where, in General Formula (2), L is an alkylene group having 2 or more but 18 or less carbon atoms.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: February 20, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeyuki Harada, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Takuya Yamazaki, Koichiro Oyama, Akiyoshi Sabu, Akihiko Matsuyama, Yoshiki Yanagawa
  • Publication number: 20180002553
    Abstract: A copolymer including a structural unit represented by General Formula (1) below, and a structural unit represented by General Formula (2) below, where, in General Formula (1), R1 is a hydrogen atom or a methyl group, L1 is an alkylene group having 2 or greater carbon atoms but 5 or less carbon atoms, and X is a hydrogen atom or a cation, where, in General Formula (2), R2 is a hydrogen atom or a methyl group and L2 is an alkylene group having 2 or greater carbon atoms but 18 or less carbon atoms.
    Type: Application
    Filed: September 14, 2017
    Publication date: January 4, 2018
    Inventors: Shigeyuki HARADA, Akihiko MATSUYAMA, Yoshiki YANAGAWA, Masayuki FUKUOKA, Takuya YAMAZAKI, Kazukiyo NAGAI, Yuusuke KOIZUKA, Tomoyuki SHIMADA, Akiyoshi SABU
  • Patent number: 9850335
    Abstract: A copolymer includes a structure unit represented by Chemical Formula I; and a structure unit represented by Chemical Formula II, where R1 and R2 each, independently represent hydrogen atoms or methyl groups, X represents a hydrogen atom or a cation, and L represents an alkylene group having 2 to 18 carbon atoms.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: December 26, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeyuki Harada, Keita Katoh, Masayuki Fukuoka, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Yoshiki Yanagawa, Akiyoshi Sabu, Akihiko Matsuyama, Takuya Yamazaki
  • Patent number: 9850391
    Abstract: Provided is an ink including: copolymer including at least one of structural unit of formula (1) and structural unit of formula (2); pigment having acid value of ?15 ?mol/g and represented by formula (3); water; and water-soluble organic solvent. In formula (1), R1 represents hydrogen or methyl group. L1 represents alkylene group including 2-18 carbon atoms. In formula (2), R1 represents hydrogen or methyl group. L2 represents single bond or —(CH2)n-O— of which oxygen is bound with biphenyl. n represents integer of 2 through 18. In formula (3), R1 represents any one of hydrogen, halogen, alkyl group including 1-4 carbon atoms, alkoxy group including 1-4 carbon atoms, hydroxy, nitro, and alkyl substituted or unsubstituted amino group including 1-4 carbon atoms. n represents integer of 1 through 5. When n is a plural number, R1 may be identical or different. R2, R3, and R4 represent alkyl group including 1-4 carbon atoms.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: December 26, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Fukuoka, Shigeyuki Harada, Yoshiki Yanagawa, Takuya Yamazaki, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu, Akihiko Matsuyama
  • Patent number: 9777091
    Abstract: A copolymer includes the structure unit represented by the following Chemical formula 1 and the structure unit represented by the following Chemical formula 2, where R1 and R2 each, independently represent hydrogen atoms or methyl groups, and n represents a value in the range of from 1 to 90, where R3 represents a hydrogen atom or a methyl group and L represents an alkylene group having 2 to 18 carbon atoms.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: October 3, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Fukuoka, Shigeyuki Harada, Yoshiki Yanagawa, Keita Katoh, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu, Takuya Yamazaki, Akihiko Matsuyama
  • Publication number: 20170267884
    Abstract: Provided is an ink containing water, a coloring material, and a copolymer, wherein the copolymer contains a structural unit represented by any one of general formulae (1a), (1b), and (1c) below and a structural unit containing an anionic group, where R1 represents a hydrogen atom or a methyl group, a represents an integer of from 6 through 10, and b represents an integer of 0 or 1, where R2 represents a hydrogen atom or a methyl group, c represents an integer of 3 or 4, and d represents an integer of 0 or 1, where R3 represents a hydrogen atom or a methyl group and e represents an integer of from 2 through 10.
    Type: Application
    Filed: March 9, 2017
    Publication date: September 21, 2017
    Inventors: Yuusuke KOIZUKA, Kazukiyo NAGAI, Tomoyuki SHIMADA, Shigeyuki HARADA, Koichiro OYAMA, Takuya YAMAZAKI, Akiyoshi SABU, Yoshiki YANAGAWA, Akihiko MATSUYAMA
  • Patent number: 9752037
    Abstract: An inkjet recording ink, including: water; a water-soluble organic solvent; a pigment; and a phosphate group-containing copolymer, wherein the phosphate group-containing copolymer contains a structural unit represented by the following General Formula (1) and a structural unit represented by the following General Formula (2): where R1 denotes a hydrogen atom or a methyl group; M+ denotes an alkali metal ion, an organic amine ion, or a hydrogen ion; half or more of M+ in the copolymer is the alkali metal ion or the organic amine ion, the remainder of M+ is the hydrogen ion; n and m each denote an integer of 0 to 6, provided that both of n and m are not 0; and a block of (C2H4O) and a block of (C3H6O) may be exchanged with each other, where R2 denotes a hydrogen atom or a methyl group.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: September 5, 2017
    Assignees: Ricoh Company, Ltd., GOO CHEMICAL CO., LTD.
    Inventors: Minoru Hakiri, Mitsuru Naruse, Masayasu Nonogaki, Keita Katoh, Akihiko Matsuyama, Kazukiyo Nagai, Yuusuke Koizuka, Masato Matsumura, Takuya Furuta
  • Patent number: 9688871
    Abstract: An inkjet recording ink, including: water; a water-soluble solvent; a pigment; and a phosphate group-containing copolymer, wherein the phosphate group-containing copolymer includes a structural unit represented by the following general formula (1) and a structural unit represented by the following general formula (2): wherein, in the general formula (1), R1 represents either of a hydrogen atom and a methyl group; and M+ represents any of an alkali metal ion, an organic amine ion and a hydrogen ion, one-half or more of the M+ in the copolymer is an alkali metal ion or an organic amine, and the remainder is a hydrogen ion; wherein, in the general formula (2), R2 represents either of a hydrogen atom and a methyl group.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: June 27, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masayasu Nonogaki, Keita Katoh, Minoru Hakiri, Mitsuru Naruse, Akihiko Matsuyama, Kazukiyo Nagai, Yuusuke Koizuka, Nobuyuki Sakamoto, Yosuke Matsuoka, Masatomo Takahashi