Patents by Inventor Kenji Tokuhisa

Kenji Tokuhisa 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: 20230295470
    Abstract: A base material/adhesive layer integrated sheet for a flexible device, containing a flexible film and an adhesive layer, in which the flexible film and the adhesive layer are laminated, an absolute value of a difference between surface free energy of the flexible film and surface free energy of a cured layer obtained by curing the adhesive layer is 30 dyn/cm or less, and the cured layer has a storage modulus of 5.0 GPa or less; and a method of producing a flexible device with the same.
    Type: Application
    Filed: May 30, 2023
    Publication date: September 21, 2023
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Koyuki SAKAI, Kenji TOKUHISA
  • Patent number: 10964440
    Abstract: A cationically polymerizable anisotropic conductive film is provided. The cationically polymerizable anisotropic conductive film includes an alicyclic epoxy compound and achieves storage life property better than known anisotropic conductive films while ensuring curing temperature and connection reliability equivalent to known anisotropic conductive films. The anisotropic conductive film contains a binder composition containing a film forming component and a cationically polymerizable component, a cationic polymerization initiator, and conductive particles. The anisotropic conductive film contains a quaternary ammonium salt-based thermal acid generator as a cationic polymerization initiator and an alicyclic epoxy compound and a low polarity oxetane compound as a cationically polymerizable component.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: March 30, 2021
    Assignee: DEXERIALS CORPORATION
    Inventors: Shinichi Hayashi, Kenji Tokuhisa, Etsuko Yamaguchi
  • Publication number: 20190027267
    Abstract: A cationically polymerizable anisotropic conductive film is provided. The cationically polymerizable anisotropic conductive film includes an alicyclic epoxy compound and achieves storage life property better than known anisotropic conductive films while ensuring curing temperature and connection reliability equivalent to known anisotropic conductive films. The anisotropic conductive film contains a binder composition containing a film forming component and a cationically polymerizable component, a cationic polymerization initiator, and conductive particles. The anisotropic conductive film contains a quaternary ammonium salt-based thermal acid generator as a cationic polymerization initiator and an alicyclic epoxy compound and a low polarity oxetane compound as a cationically polymerizable component.
    Type: Application
    Filed: February 10, 2017
    Publication date: January 24, 2019
    Applicant: DEXERIALS CORPORATION
    Inventors: Shinichi HAYASHI, Kenji TOKUHISA, Etsuko YAMAGUCHI
  • Patent number: 7981318
    Abstract: Provided is a reaction reagent for trifluoromethylation with high general versatility and good efficiency. The reaction reagent for trifluoromethylation contains an iron compound, trifluoromethyl iodide, a sulfoxide and a peroxide, and may further contain an acid. The iron compound is, for example, iron(II) sulfate, ammonium iron(II) sulfate, iron(II) tetrafluoroborate, ferrocene, bis(?5-pentamethylcyclopentadienyl)iron or an iron powder; the sulfoxide is, for example, dimethyl sulfoxide; the peroxide is, for example, hydrogen peroxide or hydrogen peroxide-urea composite; and the acid is, for example, sulfuric acid, tetrafluoroboric acid or trifluoromethanesulfonic acid.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: July 19, 2011
    Assignees: Sagami Chemical Research Center, Tosoh F-Tech, Inc.
    Inventors: Tetsu Yamakawa, Kyoko Yamamoto, Daisuke Uraguchi, Kenji Tokuhisa
  • Patent number: 7884202
    Abstract: Nucleobases are perfluoroalkylated in a one step process with a perfluoroalkyl halide in the presence of a sulfoxide, a peroxide and an iron compound. Compounds so produced are useful as medicinal drugs, intermediates for medicinal drugs and agricultural chemicals.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: February 8, 2011
    Assignees: Tosoh Corporation, Tosoh F-Tech, Inc., Sagami Chemical Research Center
    Inventors: Tetsu Yamakawa, Kyoko Yamamoto, Daisuke Uraguchi, Kenji Tokuhisa
  • Publication number: 20100230633
    Abstract: Provided is a reaction reagent for trifluoromethylation with high general versatility and good efficiency. The reaction reagent for trifluoromethylation contains an iron compound, trifluoromethyl iodide, a sulfoxide and a peroxide, and may further contain an acid. The iron compound is, for example, iron(II) sulfate, ammonium iron(II) sulfate, iron(II) tetrafluoroborate, ferrocene, bis(?5-pentamethylcyclopentadienyl)iron or an iron powder; the sulfoxide is, for example, dimethyl sulfoxide; the peroxide is, for example, hydrogen peroxide or hydrogen peroxide-urea composite; and the acid is, for example, sulfuric acid, tetrafluoroboric acid or trifluoromethanesulfonic acid.
    Type: Application
    Filed: November 6, 2007
    Publication date: September 16, 2010
    Inventors: Tetsu Yamakawa, Kyoko Yamamoto, Daisuke Uraguchi, Kenji Tokuhisa
  • Patent number: 7759440
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), wherein R1 is a hydrogen atom, a halogen atom, a hydrocarbon group or a fluorine-containing alkyl group; R2 is a straight-chain or branched alkyl group, a cyclic alkyl group, an aromatic group, or a substituent having at least two of these groups, the R2 being optionally partially fluorinated; R3 is a hydrogen atom, a hydrocarbon group that is optionally branched, a fluorine-containing alkyl group, or a cyclic group having an aromatic or alicyclic structure, the R3 optionally containing a bond of an oxygen atom or carbonyl group; and n is an integer of 1-2.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: July 20, 2010
    Assignees: Central Glass Company, Limited, F-Tech, Inc.
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai
  • Publication number: 20100080997
    Abstract: An epoxy prepolymer having excellent thermal conductivity is obtained by reacting an epoxy compound having a mesogenic skeleton and a trinuclear bisphenol represented by the following formula: (wherein each of R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12 represents a hydrogen atom or an alkyl group and each may be the same or different while at least one represents an alkyl group).
    Type: Application
    Filed: September 25, 2009
    Publication date: April 1, 2010
    Applicant: TDK CORPORATION
    Inventors: Junichi Seki, Kenji Tokuhisa
  • Publication number: 20100080998
    Abstract: The present invention provides an epoxy resin composition that is excellent in thermal conductivity and has improved high-temperature resistance and handleability. The epoxy resin composition comprises an epoxy compound having a mesogenic skeleton and a curing agent having a biphenylaralkyl skeleton. The biphenylaralkyl skeleton-containing curing agent preferably has a softening point of 110° C. or lower. The biphenylaralkyl skeleton-containing curing agent is preferably an amorphous curing agent.
    Type: Application
    Filed: September 25, 2009
    Publication date: April 1, 2010
    Applicant: TDK CORPORATION
    Inventors: Junichi Seki, Kenji Tokuhisa
  • Publication number: 20090124796
    Abstract: Provided is a simple and efficient production process of a nucleobase having a perfluoroalkyl group. A nucleobase (for example, uracils, cytosines, adenines, guanines, hypoxanthines, xanthines, or the like) is reacted with a perfluoroalkyl halide in the presence of a sulfoxide, a peroxide and an iron compound to produce a perfluoroalkyl-substituted nucleobase, which is useful as an intermediate for medical drugs, economically.
    Type: Application
    Filed: November 6, 2006
    Publication date: May 14, 2009
    Inventors: Tetsu Yamakawa, Kyoko Yamamoto, Daisuke Uraguchi, Kenji Tokuhisa
  • Patent number: 7470808
    Abstract: A process for producing a fluorine-containing acrylic acid ester represented by CH2?C(Rf)(COOR) characterized in that 1-bromo-1-perfluoroalkylethene represented by CH2?CBr—Rf, or 1,2-dibromo-1-perfluoroalkylethane represented by CH2CBr—CHBr—Rf is allowed to react with an alcohol represented by ROH in the presence of a palladium catalyst, carbon monoxide, and two or more kinds of bases. The fluorine-containing acrylic acid ester is a useful compound having wide applications in materials for pharmaceuticals and functional polymers.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: December 30, 2008
    Assignees: Tosoh F-Tech, Inc., Sagami Chemical Research Center
    Inventors: Takamasa Fuchikami, Noriko Wakasa, Kenji Tokuhisa, Hideyuki Mimura, Shoji Arai
  • Publication number: 20060252897
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), wherein R1 is a hydrogen atom, a halogen atom, a hydrocarbon group or a fluorine-containing alkyl group; R2 is a straight-chain or branched alkyl group, a cyclic alkyl group, an aromatic group, or a substituent having at least two of these groups, the R2 being optionally partially fluorinated; R3 is a hydrogen atom, a hydrocarbon group that is optionally branched, a fluorine-containing alkyl group, or a cyclic group having an aromatic or alicyclic structure, the R3 optionally containing a bond of an oxygen atom or carbonyl group; and n is an integer of 1-2.
    Type: Application
    Filed: July 13, 2006
    Publication date: November 9, 2006
    Applicants: Central Glass Company, Limited, F-Tech, Inc.
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai
  • Patent number: 7094850
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), wherein R1 is a hydrogen atom, a halogen atom, a hydrocarbon group or a fluorine-containing alkyl group; R2 is a straight-chain or branched alkyl group, a cyclic alkyl group, an aromatic group, or a substituent having at least two of these groups, the R2 being optionally partially fluorinated; R3 is a hydrogen atom, a hydrocarbon group that is optionally branched, a fluorine-containing alkyl group, or a cyclic group having an aromatic or alicyclic structure, the R3 optionally containing a bond of an oxygen atom or carbonyl group; and n is an integer of 1–2.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: August 22, 2006
    Assignee: Central Glass Company, Limited
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai
  • Publication number: 20060183937
    Abstract: An ?-pentafluoroethyl acrylic acid derivative represented by the general formula [I]: [wherein R represents a hydrogen atom, a non-substituted or substituted aromatic ring, or a straight or branched alkyl group having 1 to 20 carbon(s) which may have a cyclic moiety optionally substituted with at least one substituent (halogen atom, hydroxyl group, straight or branched alkoxy group having 1 to 10 carbon(s) which may have a cyclic moiety, non-substituted or substituted aromatic group)].
    Type: Application
    Filed: March 24, 2004
    Publication date: August 17, 2006
    Inventors: Kenji Tokuhisa, Hideyuki Mimura, Kosuke Kawada, Shoji Arai
  • Publication number: 20060122423
    Abstract: A process for producing a fluorine-containing acrylic acid ester represented by CH2?C(Rf)(COOR) characterized in that 1-bromo-1-perfluoroalkylethene represented by CH2?CBr—Rf, or 1,2-dibromo-1-perfluoroalkylethane represented by CH2CBr—CHBr—Rf is allowed to react with an alcohol represented by ROH in the presence of a palladium catalyst, carbon monoxide, and two or more kinds of bases. The fluorine-containing acrylic acid ester is a useful compound having wide applications in materials for pharmaceuticals and functional polymers.
    Type: Application
    Filed: March 24, 2004
    Publication date: June 8, 2006
    Inventors: Takamasa Fuchikami, Noriko Wakasa, Kenji Tokuhisa, Hideyuki Mimura, Shoji Arai
  • Publication number: 20040236046
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), 1
    Type: Application
    Filed: June 30, 2004
    Publication date: November 25, 2004
    Applicants: Central Glass Company, Limited, F-Tech, Inc.
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai
  • Patent number: 6784312
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), wherein R1 is a hydrogen atom, a halogen atom, a hydrocarbon group or a fluorine-containing alkyl group; R2 is a straight-chain or branched alkyl group, a cyclic alkyl group, an aromatic group, or a substituent having at least two of these groups, the R2 being optionally partially fluorinated; R3 is a hydrogen atom, a hydrocarbon group that is optionally branched, a fluorine-containing alkyl group, or a cyclic group having an aromatic or alicyclic structure, the R3 optionally containing a bond of an oxygen atom or carbonyl group; and n is an integer of 1-2.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: August 31, 2004
    Assignees: Central Glass Company, Limited, F-Tech, Inc.
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai
  • Publication number: 20030078352
    Abstract: The present invention relates to a polymerizable monomer represented by the general formula (1), 1
    Type: Application
    Filed: July 19, 2002
    Publication date: April 24, 2003
    Applicant: Central Glass Company, Limited
    Inventors: Satoru Miyazawa, Kazuhiko Maeda, Kenji Tokuhisa, Shoji Arai