Patents by Inventor Masafumi Umekawa
Masafumi Umekawa 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: 20230140258Abstract: Provided is a battery capable of maintaining electrical insulation between a battery lid and a battery can when exposed to an aqueous solution such as sea water. Disclosed is a secondary battery including an electrode winding body in which a strip-shaped positive electrode and a strip-shaped negative electrode are stacked with a separator interposed between the electrodes and wound, an electrolytic solution, and a battery can that houses the electrode winding body and the electrolytic solution, the battery can having an opening hermetically sealed by a safety valve mechanism and a battery lid with a gasket interposed therebetween, in which the battery lid includes a terminal portion and a flange portion, and a metal layer is included between an outer main surface of among main surfaces of the flange portion and the gasket.Type: ApplicationFiled: December 28, 2022Publication date: May 4, 2023Inventors: Kunio SODEYAMA, Masafumi UMEKAWA
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Publication number: 20220149445Abstract: There is provided a secondary battery in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween, and an electrode winding body having a wound structure, an electrolytic solution, and a positive electrode tab connected to the positive electrode are accommodated in an outer can. An insulator is disposed in proximity to an end on a side of the positive electrode tab of the electrode winding body. The electrode winding body and the insulator each have a center hole. A diameter or size of the center hole of the insulator is larger than a diameter of the center hole of the electrode winding body and is smaller than 1.1 times a width of the positive electrode tab.Type: ApplicationFiled: January 27, 2022Publication date: May 12, 2022Inventors: Kunio SODEYAMA, Noriaki KOKUBU, Masafumi UMEKAWA, Osamu NAGANUMA, Yoko ENDO, Ming SUN
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Patent number: 10790490Abstract: A battery includes: an electrode body; and a battery can housing the electrode body and having a bottom portion. The bottom portion has an arc-shaped groove. An opening angle of the groove with respect to a center of the bottom portion is 0.5 degrees or more and 56 degrees or less. A ratio of an inner diameter of the groove with respect to an outer diameter of the bottom portion is 44% or more and 77% or less.Type: GrantFiled: August 15, 2016Date of Patent: September 29, 2020Assignee: Murata Manufacturing Co., Ltd.Inventors: Kunio Sodeyama, Masafumi Umekawa, Kazunori Noguchi, Takao Mori, Kazuhiko Suzuki
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Publication number: 20200243822Abstract: A battery includes: an electrode body; and a battery can housing the electrode body and having a bottom portion. The bottom portion has an arc-shaped groove. An opening angle of the groove with respect to a center of the bottom portion is 0.5 degrees or more and 56 degrees or less. A ratio of an inner diameter of the groove with respect to an outer diameter of the bottom portion is 44% or more and 77% or less.Type: ApplicationFiled: August 15, 2016Publication date: July 30, 2020Inventors: Kunio SODEYAMA, Masafumi UMEKAWA, Kazunori NOGUCHI, Takao MORI, Kazuhiko SUZUKI
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Publication number: 20180175333Abstract: A battery includes: an electrode body; and a battery can configured to accommodate the electrode body and include a bottom part. At least one surface of the bottom part has two or more grooves on a same circumference, a proportion of an inner diameter of the groove to an outer diameter of the bottom part is 44% or more, and a proportion of a total value of intervals of the grooves to a perimeter of the circumference is 2% or more and 24% or less.Type: ApplicationFiled: May 18, 2016Publication date: June 21, 2018Inventors: Kunio SODEYAMA, Takao MORI, Masafumi UMEKAWA, Kazunori NOGUCHI
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Patent number: 8624065Abstract: A method for producing an oxidized cyclic phenol sulfide which comprises the step of oxidizing a cyclic phenol sulfide of the following formula (1) as a raw material: wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 8, in a solvent(s) other than a halogenated hydrocarbon in an amount of 2 or more and less than 10 parts by weight per 1 part by weight of the cyclic phenol sulfide, with an oxidizing agent(s) to obtain an oxidized cyclic phenol sulfide of the following formula (2): wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 8, and n is 1 or 2.Type: GrantFiled: June 14, 2012Date of Patent: January 7, 2014Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Publication number: 20120253054Abstract: A method for producing an oxidized cyclic phenol sulfide which comprises the step of oxidizing a cyclic phenol sulfide of the following formula (1) as a raw material: wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 8, in a solvent(s) other than a halogenated hydrocarbon in an amount of 2 or more and less than 10 parts by weight per 1 part by weight of the cyclic phenol sulfide, with an oxidizing agent(s) to obtain an oxidized cyclic phenol sulfide of the following formula (2): wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 8, and n is 1 or 2.Type: ApplicationFiled: June 14, 2012Publication date: October 4, 2012Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Patent number: 8263786Abstract: The object of the present invention is, in methods for producing cyclic phenol sulfides, to provide methods for producing a number of more macrocyclic products, which comprise the steps of producing a mixture of cyclic phenol sulfides from an inexpensive raw material in one step without inducing the reduction in yield of a cyclic quatromer; and easily separating and purifying a single component from the mixture of cyclic phenol sulfides. The present invention discloses methods for producing a cyclic phenol sulfide which comprises the step of reacting a phenol compound as a raw material, in a one-step reaction, with 1.7 to 2.5 molar equivalent of sulfur and 0.25 to 0.75 molar equivalent of an alkali metal reagent per 1 mol of the phenol compound to obtain a mixture of cyclic phenol sulfide wherein m=4 and at least one kind(s) of cyclic phenol sulfide wherein m=5 to 9, or each separate cyclic phenol sulfide comprised in the mixture.Type: GrantFiled: August 29, 2007Date of Patent: September 11, 2012Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Patent number: 8232429Abstract: A method for producing an oxidized cyclic phenol sulfide which comprises the step of oxidizing a cyclic phenol sulfide of the following formula (1) as a raw material: wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 8, in a solvent(s) other than a halogenated hydrocarbon in an amount of 2 or more and less than 10 parts by weight per 1 part by weight of the cyclic phenol sulfide, with an oxidizing agent(s) to obtain an oxidized cyclic phenol sulfide of the following formula (2): wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 8, and n is 1 or 2.Type: GrantFiled: July 16, 2009Date of Patent: July 31, 2012Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Patent number: 7901858Abstract: The present invention discloses a mixed cyclic phenol sulfide which is a mixture of the cyclic phenol sulfide wherein m is 8 and the cyclic phenol sulfide wherein m is an integer other than 8, the cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 9; or a cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in the environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: GrantFiled: September 29, 2008Date of Patent: March 8, 2011Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20100310911Abstract: A battery pack includes a plurality of batteries, each including a battery element formed by winding or stacking a positive electrode and a negative electrode with a separator therebetween, and a packaging material packaging the battery element; a connecting member that electrically connects the batteries to form a battery group; a holding unit that holds the batteries together; a protection circuit substrate connected to the battery group; and an outer packaging member that integrally covers the battery group and the protection circuit substrate, the outer packaging member being formed by filling a space in a molding die housing the battery group and the protection circuit substrate with a resin and curing the resin at a temperature of 100° C. or less.Type: ApplicationFiled: May 6, 2010Publication date: December 9, 2010Applicant: SONY CORPORATIONInventors: Takeru Yamamoto, Takehiko Tanaka, Masayuki Tohda, Tetsuya Makino, Kengo Ichimiya, Masafumi Umekawa
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Patent number: 7820832Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein m is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: GrantFiled: June 9, 2009Date of Patent: October 26, 2010Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Patent number: 7709172Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein m is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: GrantFiled: October 10, 2008Date of Patent: May 4, 2010Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20090275783Abstract: A method for producing an oxidized cyclic phenol sulfide which comprises the step of oxidizing a cyclic phenol sulfide of the following formula (1) as a raw material: wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 8, in a solvent(s) other than a halogenated hydrocarbon in an amount of 2 or more and less than 10 parts by weight per 1 part by weight of the cyclic phenol sulfide, with an oxidizing agent(s) to obtain an oxidized cyclic phenol sulfide of the following formula (2): wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 8, and n is 1 or 2.Type: ApplicationFiled: July 16, 2009Publication date: November 5, 2009Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Publication number: 20090264661Abstract: The object of the present invention is, in methods for producing cyclic phenol sulfides, to provide methods for producing a number of more macrocyclic products, which comprise the steps of producing a mixture of cyclic phenol sulfides from an inexpensive raw material in one step without inducing the reduction in yield of a cyclic quatromer; and easily separating and purifying a single component from the mixture of cyclic phenol sulfides. The present invention discloses methods for producing a cyclic phenol sulfide which comprises the step of reacting a phenol compound as a raw material, in a one-step reaction, with 1.7 to 2.5 molar equivalent of sulfur and 0.25 to 0.75 molar equivalent of an alkali metal reagent per 1 mol of the phenol compound to obtain a mixture of cyclic phenol sulfide wherein m=4 and at least one kind(s) of cyclic phenol sulfide wherein m=5 to 9, or each separate cyclic phenol sulfide comprised in the mixture.Type: ApplicationFiled: August 29, 2007Publication date: October 22, 2009Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Publication number: 20090239169Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein m is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: ApplicationFiled: June 9, 2009Publication date: September 24, 2009Applicant: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20090042120Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein in is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: ApplicationFiled: October 10, 2008Publication date: February 12, 2009Applicant: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20090035678Abstract: The present invention discloses a mixed cyclic phenol sulfide which is a mixture of the cyclic phenol sulfide wherein m is 8 and the cyclic phenol sulfide wherein m is an integer other than 8, the cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 9; or a cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in the environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: ApplicationFiled: September 29, 2008Publication date: February 5, 2009Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe