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: 11465955Abstract: 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: GrantFiled: January 14, 2021Date of Patent: October 11, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya Takakuwa, Osamu Yamamoto, Katsuki Fujiwara, Kei Kuramoto, Yuuta Hasumoto
-
Patent number: 11155507Abstract: 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: GrantFiled: December 22, 2020Date of Patent: October 26, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya Takakuwa, Osamu Yamamoto, Katsuki Fujiwara, Kei Kuramoto, Yuuta Hasumoto
-
Patent number: 11124468Abstract: 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: GrantFiled: December 22, 2020Date of Patent: September 21, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya Takakuwa, Osamu Yamamoto, Katsuki Fujiwara, Kei Kuramoto, Yuuta Hasumoto
-
Patent number: 11053180Abstract: 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: GrantFiled: April 10, 2020Date of Patent: July 6, 2021Assignees: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITYInventors: Tatsuya Morikawa, Mana Shimokawa, Katsuki Fujiwara, Satoshi Tokuno, Masakazu Higuchi, Susumu Kitagawa
-
Publication number: 20210130268Abstract: 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: ApplicationFiled: January 14, 2021Publication date: May 6, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya TAKAKUWA, Osamu YAMAMOTO, Katsuki FUJIWARA, Kei KURAMOTO, Yuuta HASUMOTO
-
Publication number: 20210107850Abstract: 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: ApplicationFiled: December 22, 2020Publication date: April 15, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya TAKAKUWA, Osamu YAMAMOTO, Katsuki FUJIWARA, Kei KURAMOTO, Yuuta HASUMOTO
-
Publication number: 20200239389Abstract: 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: ApplicationFiled: April 10, 2020Publication date: July 30, 2020Applicants: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITYInventors: Tatsuya Morikawa, Mana Shimokawa, Katsuki Fujiwara, Satoshi Tokuno, Masakazu Higuchi, Susumu Kitagawa
-
Patent number: 10654775Abstract: 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: GrantFiled: June 15, 2016Date of Patent: May 19, 2020Assignees: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITYInventors: Tatsuya Morikawa, Mana Shimokawa, Katsuki Fujiwara, Satoshi Tokuno, Masakazu Higuchi, Susumu Kitagawa
-
Publication number: 20180222823Abstract: 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: ApplicationFiled: June 15, 2016Publication date: August 9, 2018Applicants: DAIKIN INDUSTRIES, LTD., KYOTO UNIVERSITYInventors: Tatsuya MORIKAWA, Mana SHIMOKAWA, Katsuki FUJIWARA, Satoshi TOKUNO, Masakazu HIGUCHI, Susumu KITAGAWA
-
Patent number: 8496845Abstract: 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: GrantFiled: June 30, 2009Date of Patent: July 30, 2013Assignee: Daikin Industries, Ltd.Inventors: Tatsumi Tsuchiya, Katsuki Fujiwara, Masahiro Noguchi, Yasufu Yamada
-
Publication number: 20110108756Abstract: 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: ApplicationFiled: June 30, 2009Publication date: May 12, 2011Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tatsumi Tsuchiya, Katsuki Fujiwara, Masahiro Noguchi, Yasufu Yamada
-
Patent number: 6187219Abstract: 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: GrantFiled: January 12, 1999Date of Patent: February 13, 2001Assignee: Daikin Industries, Ltd.Inventors: Yukio Omure, Masahiro Noguchi, Katsuki Fujiwara
-
Patent number: 6183660Abstract: 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: GrantFiled: September 19, 1997Date of Patent: February 6, 2001Assignee: Daikin Industries, Ltd.Inventors: Yukio Omure, Masahiro Noguchi, Katsuki Fujiwara
-
Patent number: 6019909Abstract: 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: GrantFiled: July 21, 1995Date of Patent: February 1, 2000Assignee: Daikin Industries, Ltd.Inventors: Satoshi Ide, Katsuki Fujiwara, Masayuki Yamana, Yoshitaka Honda, Ikuo Yamamoto, Fumihiko Yamaguchi, Eiji Seki, Tatsuya Otsuka, Satoshi Ishida
-
Patent number: 5066410Abstract: 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: GrantFiled: May 1, 1990Date of Patent: November 19, 1991Assignee: Daikin Industries, Ltd.Inventors: Yukio Omure, Katsuki Fujiwara, Tatsumi Tsuchiya, Satoshi Hishida, Masahiro Noguchi, Ikuo Yamamoto
-
Patent number: 4985168Abstract: 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: GrantFiled: April 27, 1990Date of Patent: January 15, 1991Assignee: Daikin Industries, Ltd.Inventors: Yukio Ohmure, Hiroshi Kashiwagi, Katsuki Fujiwara, Tatsumi Tsuchiya, Hirokazu Aoyama