Patents by Inventor Maki Shigematsu
Maki Shigematsu 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).
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Publication number: 20200346999Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: ApplicationFiled: July 22, 2020Publication date: November 5, 2020Applicant: AGC INC.Inventors: Masato FUKUSHIMA, Masaaki TSUZAKI, Maki SHIGEMATSU
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Patent number: 10759725Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: GrantFiled: September 6, 2019Date of Patent: September 1, 2020Assignee: AGC INC.Inventors: Masato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
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Publication number: 20200002254Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: ApplicationFiled: September 6, 2019Publication date: January 2, 2020Applicant: AGC INC.Inventors: Masato FUKUSHIMA, Masaaki Tsuzaki, Maki Shigematsu
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Patent number: 10442745Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: GrantFiled: March 25, 2019Date of Patent: October 15, 2019Assignee: AGC INC.Inventors: Masato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
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Publication number: 20190218163Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: ApplicationFiled: March 25, 2019Publication date: July 18, 2019Applicant: AGC INC.Inventors: Masato FUKUSHIMA, Masaaki TSUZAKI, Maki SHIGEMATSU
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Patent number: 10280129Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: GrantFiled: September 28, 2017Date of Patent: May 7, 2019Assignee: AGC Inc.Inventors: Masato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
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Publication number: 20180016213Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: ApplicationFiled: September 28, 2017Publication date: January 18, 2018Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Masato Fukushima, Masaaki TSUZAKI, Maki SHIGEMATSU
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Patent number: 9862660Abstract: To provide a method for purifying trifluoroethylene, by which from a fluid containing trifluoroethylene, a C1-5 alkane or alkene (excluding trifluoroethylene) in which at least one hydrogen atom may be substituted with a chlorine atom or a fluorine atom can be efficiently removed, and a method for producing trifluoroethylene by which trifluoroethylene can be efficiently produced. A fluid containing trifluoroethylene is brought into contact with at least one type of synthetic zeolite selected from synthetic zeolites 3A, 4A and 5A.Type: GrantFiled: August 11, 2016Date of Patent: January 9, 2018Assignee: Asahi Glass Company, LimitedInventors: Masato Fukushima, Satoshi Kawaguchi, Maki Shigematsu, Yoshinobu Kadowaki, Yukio Tanaami
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Patent number: 9809516Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: GrantFiled: April 5, 2017Date of Patent: November 7, 2017Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Masato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
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Patent number: 9758456Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: GrantFiled: June 17, 2016Date of Patent: September 12, 2017Assignee: Asahi Glass Company, LimitedInventors: Masato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
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Publication number: 20170204029Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: ApplicationFiled: April 5, 2017Publication date: July 20, 2017Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Masato FUKUSHIMA, Masaaki Tsuzaki, Maki Shigematsu
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Patent number: 9638371Abstract: To provide a method for storing trifluoroethylene filled in a container for storage, transportation, etc., stably without causing a reaction such as polymerization. The method is characterized in that trifluoroethylene is stored in a sealed container in such a state that a gas phase and a liquid phase coexist, and in the gas phase, the concentration of oxygen at a temperature of 25° C. is kept to be at most 1,000 ppm by volume.Type: GrantFiled: January 14, 2016Date of Patent: May 2, 2017Assignee: Asahi Glass Company, LimitedInventors: Masaaki Tsuzaki, Masato Fukushima, Maki Shigematsu
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Publication number: 20160347693Abstract: To provide a method for purifying trifluoroethylene, by which from a fluid containing trifluoroethylene, a C1-5 alkane or alkene (excluding trifluoroethylene) in which at least one hydrogen atom may be substituted with a chlorine atom or a fluorine atom can be efficiently removed, and a method for producing trifluoroethylene by which trifluoroethylene can be efficiently produced. A fluid containing trifluoroethylene is brought into contact with at least one type of synthetic zeolite selected from synthetic zeolites 3A, 4A and 5A.Type: ApplicationFiled: August 11, 2016Publication date: December 1, 2016Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Masato FUKUSHIMA, Satoshi KAWAGUCHI, Maki SHIGEMATSU, Yoshinobu KADOWAKI, Yukio TANAAMI
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Publication number: 20160289148Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: ApplicationFiled: June 17, 2016Publication date: October 6, 2016Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Masato FUKUSHIMA, Masaaki TSUZAKI, Maki SHIGEMATSU
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Patent number: 9428430Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: GrantFiled: October 27, 2014Date of Patent: August 30, 2016Assignee: Asahi Glass Company, LimitedInventors: Masato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
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Publication number: 20160123534Abstract: To provide a method for storing trifluoroethylene filled in a container for storage, transportation, etc., stably without causing a reaction such as polymerization. The method is characterized in that trifluoroethylene is stored in a sealed container in such a state that a gas phase and a liquid phase coexist, and in the gas phase, the concentration of oxygen at a temperature of 25° C. is kept to be at most 1,000 ppm by volume.Type: ApplicationFiled: January 14, 2016Publication date: May 5, 2016Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Masaaki Tsuzaki, Masato Fukushima, Maki Shigematsu
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Publication number: 20150051426Abstract: To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.Type: ApplicationFiled: October 27, 2014Publication date: February 19, 2015Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Masato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
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Patent number: 7662192Abstract: The present invention provides a method for cleaning and rinsing an article, with excellent cleaning and rinsing performance. The present invention provides a method for cleaning and rinsing an article, characterized by comprising a cleaning step of contacting an article having a contaminant attached, with a hydrocarbon solvent containing an aromatic hydrocarbon or a glycol ether, and a rinsing step of contacting it with a fluorinated ether, wherein the fluorinated ether is a compound represented by the formula 1: R1—O—R2??Formula 1 wherein each of R1 and R2 which are independent of each other, is a fluorinated alkyl group, wherein the number of fluorine atoms contained in each of R1 and R2 is at least one, and the total number of carbon atoms contained in R1 and R2 is from 4 to 8.Type: GrantFiled: December 27, 2005Date of Patent: February 16, 2010Assignee: Asahi Glass Company, LimitedInventors: Tsuyoshi Hanada, Hidekazu Okamoto, Masaaki Tsuzaki, Maki Shigematsu
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Publication number: 20060135390Abstract: The present invention provides a method for cleaning and rinsing an article, with excellent cleaning and rinsing performance. The present invention provides a method for cleaning and rinsing an article, characterized by comprising a cleaning step of contacting an article having a contaminant attached, with a hydrocarbon solvent containing an aromatic hydrocarbon or a glycol ether, and a rinsing step of contacting it with a fluorinated ether, wherein the fluorinated ether is a compound represented by the formula 1: R1—O—R2 ??Formula 1 wherein each of R1 and R2 which are independent of each other, is a fluorinated alkyl group, wherein the number of fluorine atoms contained in each of R1 and R2 is at least one, and the total number of carbon atoms contained in R1 and R2 is from 4 to 8.Type: ApplicationFiled: December 27, 2005Publication date: June 22, 2006Applicant: Asahi Glass Company, LimitedInventors: Tsuyoshi Hanada, Hidekazu Okamoto, Masaaki Tsuzaki, Maki Shigematsu