Patents by Inventor Akira Tada

Akira Tada 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: 10992632
    Abstract: Evaluating messaging content on a computer-based communications network includes classifying, using computer hardware, a response to a message previously rated by a user. The message, the response to the message, and the rating by the user can each be provided on the computer-based communications network. Evaluating messaging content also includes automatically changing, with the computer hardware, the rating of the message when the classifying of the response results in a classification that satisfies a predefined rating change condition.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: April 27, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Masami Tada, Sanehiro Furuichi, Akira Ohkado, Satoshi Kawase
  • Publication number: 20210054301
    Abstract: The present invention provides a refrigerating machine oil comprising a hydrocarbon-based base oil having a viscosity index of 120 or less, and the refrigerating machine oil being used with a 1-chloro-2,3,3,3-tetrafluoropropene refrigerant.
    Type: Application
    Filed: February 15, 2017
    Publication date: February 25, 2021
    Applicants: JXTG NIPPON OIL & ENERGY CORPORATION, JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Yohei SHONO, Akira TADA, Yuya MIZUTANI, Takeshi OKIDO, Hidetoshi OGATA, Tatsuki NAKAJIMA
  • Patent number: 10759982
    Abstract: The present invention provides a refrigerating machine oil comprising, as a base oil, at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 7.5 or less, and the refrigerating machine oil being used with a 1-chloro-2,3,3,3-tetrafluoropropene refrigerant.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: September 1, 2020
    Assignee: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Yohei Shono, Akira Tada, Yuya Mizutani, Takeshi Okido, Hidetoshi Ogata
  • Publication number: 20200199476
    Abstract: In an aspect, the present invention provides a refrigerating machine oil comprising a poly(meth)acrylate as a base oil, wherein the poly(meth)acrylate comprises a hydrogenated poly(meth)acrylate, a content of a unit having a carbon-carbon double bond present at a terminal in the poly(meth)acrylate is 6% by mole or less relative to total units constituting the poly(meth)acrylate, and a kinematic viscosity at 40° C. of the hydrogenated poly(meth)acrylate is 1 to 1000 mm2/s, the refrigerating machine oil being used with a refrigerant comprising a refrigerant selected from difluoromethane, a mixture of difluoromethane and pentafluoroethane, a mixture of difluoromethane, pentafluoroethane, and 1,1,1,2-tetrafluoroethane, a mixture of pentafluoroethane, 1,1,1,2-tetrafluoroethane, and 1,1,1-trifluoroethane, an unsaturated hydrofluorocarbon, a hydrocarbon, and carbon dioxide.
    Type: Application
    Filed: October 20, 2017
    Publication date: June 25, 2020
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Kentaro YAMAGUCHI, Akira TADA, Tatsuki NAKAJIMA, Takeshi OKIDO, Hidetoshi OGATA
  • Patent number: 10611984
    Abstract: The refrigerating machine oil according to the present invention comprises a polyalkylene glycol represented by the following formula (1): R1—(OR3)n—OR2??(1) [R1 and R2 may be the same or different from each other and each represent a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, or an acyl group having from 2 to 5 carbon atoms, R3 represents an alkylene group having from 2 to 4 carbon atoms, n represents an integer such that a number average molecular weight of the polyalkylene glycol represented by the formula (1) is from 1000 to 2500] the polyalkylene glycol having a ratio of the weight average molecular weight Mw to the number average molecular weight Mn, Mw/Mn, of from 1.00 to 1.15, the refrigerating machine oil being used with a mildly flammable hydrofluorocarbon refrigerant.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: April 7, 2020
    Assignee: JXTG Nippon Oil & Energy Corporation
    Inventors: Hitoshi Takahashi, Ken Sawada, Akira Tada, Souichirou Konno
  • Patent number: 10550351
    Abstract: The present invention provides a refrigerating machine oil comprising at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 5.8 or less as a base oil, and the refrigerating machine oil being used with a trifluoroethylene refrigerant.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: February 4, 2020
    Assignees: JX NIPPON OIL & ENERGY CORPORATION, AGC INC.
    Inventors: Hitoshi Takahashi, Tsutomu Takahashi, Akira Tada, Souichirou Konno
  • Patent number: 10494585
    Abstract: The present invention provides a refrigerating machine oil comprising: an ester of a polyhydric alcohol and a fatty acid as a base oil; and an ether compound of a polyhydric alcohol, the refrigerating machine oil being used with an unsaturated hydrofluorocarbon refrigerant.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: December 3, 2019
    Assignee: JXTG Nippon Oil & Energy Corporation
    Inventors: Akira Tada, Ken Sawada
  • Publication number: 20190161701
    Abstract: The present invention provides a refrigerating machine oil including a lubricating base oil and a compound represented by the following formula (A): wherein Ra and Rb each independently represent a monovalent hydrocarbon group, Rc represents a divalent hydrocarbon group, X represents a polar group, and Za and Zb each independently represent oxygen atom or sulfur atom.
    Type: Application
    Filed: July 28, 2017
    Publication date: May 30, 2019
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Yohei SHONO, Yuya MIZUTANI, Kentaro YAMAGUCHI, Akira TADA, Hidetoshi OGATA
  • Publication number: 20190078005
    Abstract: The present invention provides a refrigerating machine oil comprising, as a base oil, at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 7.5 or less, and the refrigerating machine oil being used with a 1-chloro-2,3,3,3-tetrafluoropropene refrigerant.
    Type: Application
    Filed: February 15, 2017
    Publication date: March 14, 2019
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Yohei SHONO, Akira TADA, Yuya MIZUTANI, Takeshi OKIDO, Hidetoshi OGATA
  • Publication number: 20180265801
    Abstract: The refrigerating machine oil according to the present invention comprises a polyalkylene glycol represented by the following formula (1): R1—(OR3)n—OR2??(1) [R1 and R2 may be the same or different from each other and each represent a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, or an acyl group having from 2 to 5 carbon atoms, R3 represents an alkylene group having from 2 to 4 carbon atoms, n represents an integer such that a number average molecular weight of the polyalkylene glycol represented by the formula (1) is from 1000 to 2500] the polyalkylene glycol having a ratio of the weight average molecular weight Mw to the number average molecular weight Mn, Mw/Mn, of from 1.00 to 1.15, the refrigerating machine oil being used with a mildly flammable hydrofluorocarbon refrigerant.
    Type: Application
    Filed: May 21, 2018
    Publication date: September 20, 2018
    Applicant: JXTG Nippon Oil & Energy Corporation
    Inventors: Hitoshi Takahashi, Ken Sawada, Akira Tada, Souichirou Konno
  • Patent number: 10053647
    Abstract: The present invention provides a working fluid composition for a refrigerating machine, comprising a refrigerating machine oil that comprises an ester of a polyhydric alcohol and a fatty acid, an epoxy compound, and a phosphorus compound, and a fluoropropene refrigerant, wherein the polyhydric alcohol constituting the ester comprises pentaerythritol and dipentaerythritol, the fatty acid constituting the ester comprises at least one selected from fatty acids having 4 to 9 carbon atoms, and the epoxy compound and the phosphorus compound satisfy a condition represented by the following formula (1). [ Formula ? ? 1 ] ? 0.10 ? ( N E M E · W E ) ( N P M P · W P ) ? 1.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: August 21, 2018
    Assignees: Denso Corporation, Kabushki Kaisha Toyota Jidoshokki, JX Nippon Oil & Energy Corporation
    Inventors: Masataka Muto, Hajime Mukawa, Takekazu Kano, Genki Hayashi, Kazuki Yamamoto, Takahiro Hoshida, Hitoshi Takahashi, Ken Sawada, Akira Tada, Souichirou Konno
  • Patent number: 10005981
    Abstract: The refrigerating machine oil according to the present invention comprises a polyalkylene glycol represented by the following formula (1): R1—(OR3)n—OR2??(1) [R1 and R2 may be the same or different from each other and each represent a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, or an acyl group having from 2 to 5 carbon atoms, R3 represents an alkylene group having from 2 to 4 carbon atoms, n represents an integer such that a number average molecular weight of the polyalkylene glycol represented by the formula (1) is from 1000 to 2500] the polyalkylene glycol having a ratio of the weight average molecular weight Mw to the number average molecular weight Mn, Mw/Mn, of from 1.00 to 1.15, the refrigerating machine oil being used with a mildly flammable hydrofluorocarbon refrigerant.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: June 26, 2018
    Assignee: JXTG Nippon Oil & Energy Corporation
    Inventors: Hitoshi Takahashi, Ken Sawada, Akira Tada, Souichirou Konno
  • Publication number: 20180044607
    Abstract: The present invention provides a refrigerating machine oil comprising: an ester of a polyhydric alcohol and a fatty acid as a base oil; and an ether compound of a polyhydric alcohol, the refrigerating machine oil being used with an unsaturated hydrofluorocarbon refrigerant.
    Type: Application
    Filed: February 12, 2016
    Publication date: February 15, 2018
    Applicant: JXTG Nippon Oil & Energy Corporation
    Inventors: Akira Tada, Ken Sawada
  • Patent number: 9834737
    Abstract: The present invention provides a refrigerating machine oil composition comprising an ester-based base oil, an epoxy compound, and a carbodiimide compound, the refrigerating machine oil composition being used with a refrigerant containing a fluoropropene in a refrigerating machine comprising a member containing polyethylene terephthalate and/or a member containing hydrogenated acrylonitrile butadiene rubber.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: December 5, 2017
    Assignee: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Hitoshi Takahashi, Ken Sawada, Akira Tada, Souichirou Konno
  • Patent number: 9587196
    Abstract: Disclosed is a working fluid composition for a refrigerating machine, comprising a refrigerating machine oil comprising an ester of a polyhydric alcohol and a fatty acid, a carbodiimide compound, and a phosphorous compound, and at least one refrigerant selected from 1, 1, 1,2-tetrafluoroethane and 2,3,3,3-tetrafluoropropene, the fatty acid comprises at least one selected from fatty acids having 4 to 9 carbon atoms, and the carbodiimide compound and the phosphorus compound satisfy the conditions represented by the formula (1): 0.11 ? ( N C M C · W C ) ( N P M P · W P ) ? 4.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: March 7, 2017
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Hitoshi Takahashi, Ken Sawada, Akira Tada, Souichirou Konno
  • Publication number: 20170037337
    Abstract: The present invention provides a working fluid composition for a refrigerating machine, comprising a refrigerating machine oil that comprises an ester of a polyhydric alcohol and a fatty acid, an epoxy compound, and a phosphorus compound, and a fluoropropene refrigerant, wherein the polyhydric alcohol constituting the ester comprises pentaerythritol and dipentaerythritol, the fatty acid constituting the ester comprises at least one selected from fatty acids having 4 to 9 carbon atoms, and the epoxy compound and the phosphorus compound satisfy a condition represented by the following formula (1). [ Formula ? ? 1 ] ? 0.10 ? ( N E M E · W E ) ( N P M P · W P ) ? 1.
    Type: Application
    Filed: December 22, 2014
    Publication date: February 9, 2017
    Applicants: Denso Corporation, Kabushki Kaisha Toyota Jidoshokki, JX Nippon Oil & Energy Corporation
    Inventors: Masataka MUTO, Hajime MUKAWA, Takekazu KANO, Genki HAYASHI, Kazuki YAMAMOTO, Takahiro HOSHIDA, Hitoshi TAKAHASHI, Ken SAWADA, Akira TADA, Souichirou KONNO
  • Publication number: 20170015935
    Abstract: The present invention provides a refrigerating machine oil comprising at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 5.8 or less as a base oil, and the refrigerating machine oil being used with a trifluoroethylene refrigerant.
    Type: Application
    Filed: February 27, 2015
    Publication date: January 19, 2017
    Applicants: JX NIPPON OIL & ENERGY CORPORATION, ASAHI GLASS COMPANY, LIMITED
    Inventors: Hitoshi TAKAHASHI, Tsutomu TAKAHASHI, Akira TADA, Souichirou KONNO
  • Publication number: 20170009170
    Abstract: Disclosed is a working fluid composition for a refrigerating machine, comprising a refrigerating machine oil comprising an ester of a polyhydric alcohol and a fatty acid, a carbodiimide compound, and a phosphorous compound, and at least one refrigerant selected from 1, 1, 1,2-tetrafluoroethane and 2,3,3,3-tetrafluoropropene, the fatty acid comprises at least one selected from fatty acids having 4 to 9 carbon atoms, and the carbodiimide compound and the phosphorus compound satisfy the conditions represented by the formula (1): 0.11 ? ( N C M C · W C ) ( N P M P · W P ) ? 4.
    Type: Application
    Filed: January 19, 2015
    Publication date: January 12, 2017
    Applicant: JX Nippon Oil & Energy Corporation
    Inventors: Hitoshi Takahashi, Ken Sawada, Akira Tada, Souichirou Konno
  • Publication number: 20160244691
    Abstract: The refrigerating machine oil according to the present invention comprises a polyalkylene glycol represented by the following formula (1): R1—(OR3)n—OR2??(1) [R1 and R2 may be the same or different from each other and each represent a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, or an acyl group having from 2 to 5 carbon atoms, R3 represents an alkylene group having from 2 to 4 carbon atoms, n represents an integer such that a number average molecular weight of the polyalkylene glycol represented by the formula (1) is from 1000 to 2500] the polyalkylene glycol having a ratio of the weight average molecular weight Mw to the number average molecular weight Mn, Mw/Mn, of from 1.00 to 1.15, the refrigerating machine oil being used with a mildly flammable hydrofluorocarbon refrigerant.
    Type: Application
    Filed: September 30, 2014
    Publication date: August 25, 2016
    Applicant: JX Nippon Oil & Energy Corporation
    Inventors: Hitoshi Takahashi, Ken Sawada, Akira Tada, Souichirou Konno
  • Publication number: 20160244692
    Abstract: The present invention provides a refrigerating machine oil composition comprising an ester-based base oil, an epoxy compound, and a carbodiimide compound, the refrigerating machine oil composition being used with a refrigerant containing a fluoropropene in a refrigerating machine comprising a member containing polyethylene terephthalate and/or a member containing hydrogenated acrylonitrile butadiene rubber.
    Type: Application
    Filed: September 30, 2014
    Publication date: August 25, 2016
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Hitoshi TAKAHASHI, Ken SAWADA, Akira TADA, Souichirou KONNO