Patents by Inventor Katsuki Fujiwara

Katsuki Fujiwara 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: 11053180
    Abstract: The method according to this disclosure is a method for separating an unsaturated hydrocarbon having 2 or 3 carbon atoms and a halogenated unsaturated carbon compound formed by replacing at least one of hydrogen atoms included in the unsaturated hydrocarbon with a fluorine atom, from each other and is a method for selectively adsorbing either the unsaturated hydrocarbon or the halogenated unsaturated carbon compound by a porous coordination polymer that includes a metallic ion having a valence of 2 to 4 and an aromatic anion having 1 to 6 aromatic ring(s).
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: July 6, 2021
    Assignees: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITY
    Inventors: Tatsuya Morikawa, Mana Shimokawa, Katsuki Fujiwara, Satoshi Tokuno, Masakazu Higuchi, Susumu Kitagawa
  • Publication number: 20210130268
    Abstract: The present disclosure provides a method for producing a reaction gas containing R-1132(E) with selectivity higher than that of known methods. Specifically, the present disclosure provides a method for producing a reaction gas containing (E)-1,2-difluoroethylene (R-1132(E)), (1) the method comprising a step of subjecting a starting material gas containing one or more fluoromethanes selected from the group consisting of chlorodifluoromethane (R-22), difluoromethane (R-32), and fluoromethane (R-41) to a reaction that involves thermal decomposition to obtain the reaction gas, and (2) the starting material gas having a water vapor content of 1 volume % or less.
    Type: Application
    Filed: January 14, 2021
    Publication date: May 6, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsuya TAKAKUWA, Osamu YAMAMOTO, Katsuki FUJIWARA, Kei KURAMOTO, Yuuta HASUMOTO
  • Publication number: 20210107850
    Abstract: The present disclosure provides a method for producing a reaction gas containing R-1132(E) with selectivity higher than that of known methods. Specifically, the present disclosure provides a method for producing a reaction gas containing (E)-1,2-difluoroethylene (R-1132(E)), (1) the method comprising a step of subjecting a starting material gas containing one or more fluoromethanes selected from the group consisting of chlorodifluoromethane (R-22), difluoromethane (R-32), and fluoromethane (R-41) to a reaction that involves thermal decomposition to obtain the reaction gas, and (2) the starting material gas having a water vapor content of 1 volume % or less.
    Type: Application
    Filed: December 22, 2020
    Publication date: April 15, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsuya TAKAKUWA, Osamu YAMAMOTO, Katsuki FUJIWARA, Kei KURAMOTO, Yuuta HASUMOTO
  • Publication number: 20200239389
    Abstract: The method according to this disclosure is a method for separating an unsaturated hydrocarbon having 2 or 3 carbon atoms and a halogenated unsaturated carbon compound formed by replacing at least one of hydrogen atoms included in the unsaturated hydrocarbon with a fluorine atom, from each other and is a method for selectively adsorbing either the unsaturated hydrocarbon or the halogenated unsaturated carbon compound by a porous coordination polymer that includes a metallic ion having a valence of 2 to 4 and an aromatic anion having 1 to 6 aromatic ring(s).
    Type: Application
    Filed: April 10, 2020
    Publication date: July 30, 2020
    Applicants: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITY
    Inventors: Tatsuya Morikawa, Mana Shimokawa, Katsuki Fujiwara, Satoshi Tokuno, Masakazu Higuchi, Susumu Kitagawa
  • Patent number: 10654775
    Abstract: The method according to this disclosure is a method for separating an unsaturated hydrocarbon having 2 or 3 carbon atoms and a halogenated unsaturated carbon compound formed by replacing at least one of hydrogen atoms included in the unsaturated hydrocarbon with a fluorine atom, from each other and is a method for selectively adsorbing either the unsaturated hydrocarbon or the halogenated unsaturated carbon compound by a porous coordination polymer that includes a metallic ion having a valence of 2 to 4 and an aromatic anion having 1 to 6 aromatic ring(s).
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: May 19, 2020
    Assignees: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITY
    Inventors: Tatsuya Morikawa, Mana Shimokawa, Katsuki Fujiwara, Satoshi Tokuno, Masakazu Higuchi, Susumu Kitagawa
  • Publication number: 20180222823
    Abstract: The method according to this disclosure is a method for separating an unsaturated hydrocarbon having 2 or 3 carbon atoms and a halogenated unsaturated carbon compound formed by replacing at least one of hydrogen atoms included in the unsaturated hydrocarbon with a fluorine atom, from each other and is a method for selectively adsorbing either the unsaturated hydrocarbon or the halogenated unsaturated carbon compound by a porous coordination polymer that includes a metallic ion having a valence of 2 to 4 and an aromatic anion having 1 to 6 aromatic ring(s).
    Type: Application
    Filed: June 15, 2016
    Publication date: August 9, 2018
    Applicants: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITY
    Inventors: Tatsuya MORIKAWA, Mana SHIMOKAWA, Katsuki FUJIWARA, Satoshi TOKUNO, Masakazu HIGUCHI, Susumu KITAGAWA
  • Patent number: 8496845
    Abstract: The present invention provides a refrigerant composition that is nonflammable, and ensures low LCCP and less burden on the environment. More specifically, the present invention relates a refrigerant composition containing difluoromethane (HFC32), pentafluoroethane (HFC125), and 2,3,3,3-tetrafluoropropene (HFO1234yf), the ratio of HFC32/HFC125/HFO1234yf being in a range surrounded by points (0/21/79 mass %), (16.6/25.3/58.1 mass %), and (0/28.4/71.6 mass %) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf, and the composition essentially containing HFC32.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: July 30, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Tatsumi Tsuchiya, Katsuki Fujiwara, Masahiro Noguchi, Yasufu Yamada
  • Publication number: 20110108756
    Abstract: The present invention provides a refrigerant composition that is nonflammable, and ensures low LCCP and less burden on the environment. More specifically, the present invention relates a refrigerant composition containing difluoromethane (HFC32), pentafluoroethane (HFC125), and 2,3,3,3-tetrafluoropropene (HFO1234yf), the ratio of HFC32/HFC125/HFO1234yf being in a range surrounded by points (0/21/79 mass %), (16.6/25.3/58.1 mass %), and (0/28.4/71.6 mass %) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf, and the composition essentially containing HFC32.
    Type: Application
    Filed: June 30, 2009
    Publication date: May 12, 2011
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsumi Tsuchiya, Katsuki Fujiwara, Masahiro Noguchi, Yasufu Yamada
  • Patent number: 6187219
    Abstract: The invention provides a refrigerant comprising a mixture of three compounds selected from the group consisting of hydrofluorocarbons represented by the formula ClHmFn  (1) wherein when l is 1, m is an integer of 1 or 2, n is an integer of 2 or 3 and m+n=4; when l is 2, m is an integer of 1 to 4, n is an integer of 2 to 5 and m+m=6; and when l is 3, m is an integer of 1 to 3, n is an integer of 5 to 7 and m+n=8.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: February 13, 2001
    Assignee: Daikin Industries, Ltd.
    Inventors: Yukio Omure, Masahiro Noguchi, Katsuki Fujiwara
  • Patent number: 6183660
    Abstract: The invention provides a refrigerant comprising a mixture of three compounds selected from the group consisting of hydrofluorocarbons represented by the formula ClHmFn  (1) wherein when l is 1, m is an integer of 1 or 2, n is an integer of 2 or 3 and m+n=4; when l is 2, m is an integer of 1 to 4, n is an integer of 2 to 5 and m+m=6; and when l is 3, m is an integer of 1 to 3, n is an integer of 5 to 7 and m+n=8.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: February 6, 2001
    Assignee: Daikin Industries, Ltd.
    Inventors: Yukio Omure, Masahiro Noguchi, Katsuki Fujiwara
  • Patent number: 6019909
    Abstract: A novel fluorinated hydrocarbon compound containing an oxygen or sulfur atom in its molecule, produced by the nucleophilic reaction of a fluorine compound with a hydrocarbon compound. This compound is useful as a lubricant for various applications and particularly excellent as an oil for refrigerators wherein hydrochlorofluorocarbon is used as the refrigerant and as a magnetic recording medium lubricant.
    Type: Grant
    Filed: July 21, 1995
    Date of Patent: February 1, 2000
    Assignee: Daikin Industries, Ltd.
    Inventors: Satoshi Ide, Katsuki Fujiwara, Masayuki Yamana, Yoshitaka Honda, Ikuo Yamamoto, Fumihiko Yamaguchi, Eiji Seki, Tatsuya Otsuka, Satoshi Ishida
  • Patent number: 5066410
    Abstract: The present invention provides an oil for a refrigerating machine using a hydrogen-containing halogenated hydrocarbon as a refrigerant, the oil comprising a fluorine-containing polyether having repeated units represented by the formula(--CF.sub.2 CF.sub.2 CF.sub.2 O).sub.l (CHFCF.sub.2 CF.sub.2)).sub.m (CH.sub.2 CF.sub.2 CF.sub.2 O).sub.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: November 19, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Yukio Omure, Katsuki Fujiwara, Tatsumi Tsuchiya, Satoshi Hishida, Masahiro Noguchi, Ikuo Yamamoto
  • Patent number: 4985168
    Abstract: The present invention provides:(1) a working fluid comprising at least one of 3-chloro-1,1,1,2,2-pentafluoropropane and 1-chloro-1,1,3,3,3-pentafluoropropane,(2) a working fluid comprising (1) at least one of 3-chloro-1,1,1,2,2-pentafluoropropane and 1-chloro-1,1,3,3,3-pentafluoropropane and (2) at least one of 2,2-dichloro-1,1,1-trifluoroethyane, 1,2-dichloro-1,1,2-trifluoroethane and 1,1-dichloro-1,2,2-trifluoroethane, and(3) a working fluid comprising (1) at least one of 3-chloro-1,1,1,2,2-pentafluoropropane and 1-chloro-1,1,3,3,3-pentafluoropropane and (2) 1,1-dichloro-1-fluoroethane.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: January 15, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Yukio Ohmure, Hiroshi Kashiwagi, Katsuki Fujiwara, Tatsumi Tsuchiya, Hirokazu Aoyama