Patents by Inventor Mifuyu UENO
Mifuyu UENO 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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Patent number: 11708480Abstract: Provided is a rubber composition comprising: a rubber component containing diene-based rubber; a filler, and a compound represented by formula (I) below: (wherein: A is an aryl group and has at least two polar groups, which may be the same or different from each other; R1 and R2 are each independently at least one substituent selected from a group consisting of a hydrogen atom, an acyl group, an amide group, an alkyl group, a cycloalkyl group, and an aryl group; and further, the substituent may include one or more of O, S, and N atoms), so as to provide a rubber composition excellent in low heat generating property and wear resistance.Type: GrantFiled: August 3, 2017Date of Patent: July 25, 2023Assignee: OTSUKA CHEMICAL CO., LTD.Inventors: Satoshi Hamatani, Aya Saiki, Shinya Shinozaki, Mifuyu Ueno, Masaki Abe
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Publication number: 20230105406Abstract: A rubber composition comprising at least one member selected from the group consisting of compounds represented by the following formulas (1) to (7) and 3-methyl-5-pyrazolone, and a rubber component: wherein the R group is a hydrazide group, an N?-alkylidene hydrazide group, an N-allyl carbamoyl group, a 3-carboxyl acryloyl group, a hydrazine carboxyamino group, a thiocarboxyl group, a thiol group, or a hydrogen atom; R4 is a sulfur atom or an oxygen atom; R5 is a thiol group or a hydroxy group; R6 is a C1-4 alkylene group; R7 is an alkyl group, an aralkyl group, an aryl group, or a heterocyclic group; R8 is a hydrogen atom or an amino group; R9 is a heteroatom; and R10 is a heterocyclic group.Type: ApplicationFiled: February 26, 2021Publication date: April 6, 2023Applicant: OTSUKA CHEMICAL CO., LTD.Inventors: Shinya SHINOZAKI, Mifuyu UENO
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Publication number: 20230035012Abstract: An object of the present invention is to provide novel crystals. Provided are crystals of 3-hydroxy-N?-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising a peak of maximum intensity at an angle of diffraction (2?) of 6.9°.Type: ApplicationFiled: December 18, 2020Publication date: February 2, 2023Applicant: OTSUKA CHEMICAL CO., LTD.Inventors: Eriko SATO, Noriaki SHIINA, Kazuki TSUBOKURA, Mifuyu UENO
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Publication number: 20230022116Abstract: An object of the present invention is to provide novel crystals. Provided are crystals of 3-hydroxy-N?-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising a peak of maximum intensity at an angle of diffraction (2?) of 6.1±0.2°.Type: ApplicationFiled: December 18, 2020Publication date: January 26, 2023Applicant: OTSUKA CHEMICAL CO., LTD.Inventors: Eriko SATO, Noriaki SHIINA, Mifuyu UENO
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Patent number: 11339272Abstract: An additive for rubber that enables a rubber composition to have excellent low heat generating property and processability, a rubber composition containing the additive for rubber, and a tire using the same are provided.Type: GrantFiled: November 29, 2017Date of Patent: May 24, 2022Assignees: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.Inventors: Satoshi Hamatani, Shinya Shinozaki, Mifuyu Ueno, Masaki Abe
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Publication number: 20210108048Abstract: An additive for rubber that enables a rubber composition to have excellent low heat generating property and processability, a rubber composition containing the additive for rubber, and a tire using the same are provided.Type: ApplicationFiled: November 29, 2017Publication date: April 15, 2021Applicants: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.Inventors: Satoshi HAMATANI, Shinya SHINOZAKI, Mifuyu UENO, Masaki ABE
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Publication number: 20190177513Abstract: Provided is a rubber composition comprising: a rubber component containing diene-based rubber; a filler, and a compound represented by formula (I) below: (wherein: A is an aryl group and has at least two polar groups, which may be the same or different from each other; R1 and R2 are each independently at least one substituent selected from a group consisting of a hydrogen atom, an acyl group, an amide group, an alkyl group, a cycloalkyl group, and an aryl group; and further, the substituent may include one or more of O, S, and N atoms), so as to provide a rubber composition excellent in low heat generating property and wear resistance.Type: ApplicationFiled: August 3, 2017Publication date: June 13, 2019Applicants: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.Inventors: Satoshi HAMATANI, Aya SAIKI, Shinya SHINOZAKI, Mifuyu UENO, Masaki ABE
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Publication number: 20180319955Abstract: The invention provides a rubber composition prepared by mixing, per 100 parts by mass of a rubber component comprising at least 50% by mass of a diene-based rubber, from 20 to 150 parts by mass of a filler, and from 0.05 to 30 parts by mass of a compound A which has a specific guanidine structure and has a functional group reactive with the diene-based rubber. The rubber composition improves both a high elastic modulus and a low tan ?. The invention also provides a pneumatic tire using the rubber composition.Type: ApplicationFiled: July 12, 2018Publication date: November 8, 2018Applicants: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.Inventors: Noriaki YUKIMURA, Takahiro YOSHIZAWA, Kazuhiro KODAMA, Hiroaki YUASA, Noriaki SHIINA, Takashi SATO, Hiroyuki ISHITOBI, Mifuyu UENO, Shinya NAKASHIMA, Masaki ABE
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Patent number: 10066080Abstract: Provided is a rubber composition that contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisanilino compound represented by formula (I). In formula (I), R1 and R2 each represent, independently of one another, a hydrogen atom or an alkyl group having a carbon number of 1-6, m and n each represent an integer of 0 or 1, A1 represents an alkylene group having a carbon number of 1-7, A2 represents an alkylene group having a carbon number of 1-8, X1 represents an oxygen atom, a sulfur atom, or an —NR3— group, and X2 represents an oxygen atom, a sulfur atom, or an —NR4— group, where R3 and R4 each represent a hydrogen atom or an alkyl group having a carbon number of 1-4, or collectively form an alkylene group having a carbon number of 1-4.Type: GrantFiled: May 22, 2015Date of Patent: September 4, 2018Assignee: OTSUKA CHEMICAL CO., LTD.Inventors: Aya Saiki, Hidehiro Minashima, Yuzaburo Yano, Noriaki Shiina, Kazuhiro Kodama, Mifuyu Ueno, Takashi Sato, Shinya Nakashima, Masaki Abe
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Patent number: 10059829Abstract: Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit surface discoloration of a rubber article. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one amine compound represented by formula (I) shown below. In formula (I), R1 and R2 each represent, independently of one another, an alkyl group having a carbon number of 1-10, an aralkyl group, or a phenyl group, and A represents an alkylene group having a carbon number of 6-30 that may include an interposed phenylene group.Type: GrantFiled: May 22, 2015Date of Patent: August 28, 2018Assignee: OTSUKA CHEMICAL CO., LTD.Inventors: Aya Saiki, Hidehiro Minashima, Yuzaburo Yano, Noriaki Shiina, Kazuhiro Kodama, Mifuyu Ueno, Takashi Sato, Shinya Nakashima, Masaki Abe
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Patent number: 10053553Abstract: The invention provides a rubber composition prepared by mixing, per 100 parts by mass of a rubber component comprising at least 50% by mass of a diene-based rubber, from 20 to 150 parts by mass of a filler, and from 0.05 to 30 parts by mass of a compound A which has a specific guanidine structure and has a functional group reactive with the diene-based rubber. The rubber composition improves both a high elastic modulus and a low tan ?. The invention also provides a pneumatic tire using the rubber composition.Type: GrantFiled: January 30, 2014Date of Patent: August 21, 2018Assignees: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.Inventors: Noriaki Yukimura, Takahiro Yoshizawa, Kazuhiro Kodama, Hiroaki Yuasa, Noriaki Shiina, Takashi Sato, Hiroyuki Ishitobi, Mifuyu Ueno, Shinya Nakashima, Masaki Abe
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Patent number: 10011704Abstract: Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R1, R2, R5, and R6 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but R1 and R2 do not both simultaneously represent a hydrogen atom and R5 and R6 do not both simultaneously represent a hydrogen atom, R3 and R4 each represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1.Type: GrantFiled: May 22, 2015Date of Patent: July 3, 2018Assignee: OTSUKA CHEMICAL CO., LTD.Inventors: Aya Saiki, Hidehiro Minashima, Yuzaburo Yano, Noriaki Shiina, Kazuhiro Kodama, Mifuyu Ueno, Takashi Sato, Shinya Nakashima, Masaki Abe
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Publication number: 20170166727Abstract: Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit surface discoloration of a rubber article. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one amine compound represented by formula (I) shown below. In formula (I), R1 and R2 each represent, independently of one another, an alkyl group having a carbon number of 1-10, an aralkyl group, or a phenyl group, and A represents an alkylene group having a carbon number of 6-30 that may include an interposed phenylene group.Type: ApplicationFiled: May 22, 2015Publication date: June 15, 2017Applicant: OTSUKA CHEMICAL CO., LTD.Inventors: Aya SAIKI, Hidehiro MINASHIMA, Yuzaburo YANO, Noriaki SHIINA, Kazuhiro KODAMA, Mifuyu UENO, Takashi SATO, Shinya NAKASHIMA, Masaki ABE
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Publication number: 20170166728Abstract: Provided is a rubber composition that contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisanilino compound represented by formula (I). In formula (I), R1 and R2 each represent, independently of one another, a hydrogen atom or an alkyl group having a carbon number of 1-6, m and n each represent an integer of 0 or 1, A1 represents an alkylene group having a carbon number of 1-7, A2 represents an alkylene group having a carbon number of 1-8, X1 represents an oxygen atom, a sulfur atom, or an —NR3— group, and X2 represents an oxygen atom, a sulfur atom, or an —NR4— group, where R3 and R4 each represent a hydrogen atom or an alkyl group having a carbon number of 1-4, or collectively form an alkylene group having a carbon number of 1-4.Type: ApplicationFiled: May 22, 2015Publication date: June 15, 2017Applicant: OTSUKA CHEMICAL CO., LTD.Inventors: Aya SAIKI, Hidehiro MINASHIMA, Yuzaburo YANO, Noriaki SHIINA, Kazuhiro KODAMA, Mifuyu UENO, Takashi SATO, Shinya NAKASHIMA, Masaki ABE
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Publication number: 20170137604Abstract: Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R1, R2, R5, and R6 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but R1 and R2 do not both simultaneously represent a hydrogen atom and R5 and R6 do not both simultaneously represent a hydrogen atom, R3 and R4 each represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1.Type: ApplicationFiled: May 22, 2015Publication date: May 18, 2017Applicant: OTSUKA CHEMICAL CO., LTD.Inventors: Aya SAIKI, Hidehiro MINASHIMA, Yuzaburo YANO, Noriaki SHIINA, Kazuhiro KODAMA, Mifuyu UENO, Takashi SATO, Shinya NAKASHIMA, Masaki ABE
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Patent number: 9546232Abstract: The invention provides a rubber composition prepared by mixing, per 100 parts by mass of the rubber component comprising at least 50% by mass of a diene-based rubber, from 20 to 150 parts by mass of a filler, and from 0.05 to 30 parts by mass of a compound A which has a specific amidine structure and has a functional group reactive with the diene-based rubber. The rubber composition improves both a high elastic modulus and a low tan ?. The invention also provides a pneumatic tire using the rubber composition.Type: GrantFiled: January 30, 2014Date of Patent: January 17, 2017Assignees: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.Inventors: Noriaki Yukimura, Takahiro Yoshizawa, Kazuhiro Kodama, Hiroaki Yuasa, Noriaki Shiina, Takashi Sato, Hiroyuki Ishitobi, Mifuyu Ueno, Shinya Nakashima, Masaki Abe
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Publication number: 20150361248Abstract: The invention provides a rubber composition prepared by mixing, per 100 parts by mass of a rubber component comprising at least 50% by mass of a diene-based rubber, from 20 to 150 parts by mass of a filler, and from 0.05 to 30 parts by mass of a compound A which has a specific guanidine structure and has a functional group reactive with the diene-based rubber. The rubber composition improves both a high elastic modulus and a low tan ?. The invention also provides a pneumatic tire using the rubber composition.Type: ApplicationFiled: January 30, 2014Publication date: December 17, 2015Applicants: OTSUKA CHEMICAL CO., LTD., BRIDGESTONE CORPORATIONInventors: Noriaki YUKIMURA, Takahiro YOSHIZAWA, Kazuhiro KODAMA, Hiroaki YUASA, Noriaki SHIINA, Takashi SATO, Hiroyuki ISHITOBI, Mifuyu UENO, Shinya NAKASHIMA, Masaki ABE
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Publication number: 20150353657Abstract: The invention provides a rubber composition prepared by mixing, per 100 parts by mass of the rubber component comprising at least 50% by mass of a diene-based rubber, from 20 to 150 parts by mass of a filler, and from 0.05 to 30 parts by mass of a compound A which has a specific amidine structure and has a functional group reactive with the diene-based rubber. The rubber composition improves both a high elastic modulus and a low tan ?. The invention also provides a pneumatic tire using the rubber composition.Type: ApplicationFiled: January 30, 2014Publication date: December 10, 2015Applicants: OTSUKA CHEMICAL CO., LTD., BRIDGESTONE CORPORATIONInventors: Noriaki YUKIMURA, Takahiro YOSHIZAWA, Kazuhiro KODAMA, Hiroaki YUASA, Noriaki SHIINA, Takashi SATO, Hiroyuki ISHITOBI, Mifuyu UENO, Shinya NAKASHIMA, Masaki ABE