Patents by Inventor Katsutoshi Ohta
Katsutoshi Ohta 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: 10800909Abstract: Provided are a propylene homopolymer composition for a capacitor film, from which a thin film can be easily produced and which can provide a film with excellent high-temperature voltage resistance, a method for producing the same, and a capacitor film. The propylene homopolymer composition for a capacitor film contains 1% by mass or more and less than 50% by mass of a propylene homopolymer (A1) having predetermined characteristics and more than 50% by mass and 99% by mass or less of a propylene homopolymer (B1) having predetermined characteristics, and has (i) a melt flow rate (MFR) of 1.0 to 10.0 g/10 min and (ii) a chlorine content of 2 ppm by mass or less.Type: GrantFiled: July 30, 2015Date of Patent: October 13, 2020Assignees: MITSUI CHEMICALS, INC., PRIME POLYMER CO., LTD.Inventor: Katsutoshi Ohta
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Patent number: 10793708Abstract: Provided are a propylene homopolymer composition for a capacitor film, which can provide a film with excellent high-temperature voltage resistance and excellent thin-film stretchability, a method for producing the same, and a capacitor film. The propylene homopolymer composition for a capacitor film contains 50 to 99% by mass of a propylene homopolymer (A1) having predetermined characteristics and 1 to 50% by mass of a propylene homopolymer (B1) having predetermined characteristics, and has (i) a melt flow rate (MFR) of 1.0 to 10.0 g/10 min and (ii) a chlorine content of 2 ppm by mass or less.Type: GrantFiled: July 30, 2015Date of Patent: October 6, 2020Assignees: MITSUI CHEMICALS, INC., PRIME POLYMER CO., LTD.Inventor: Katsutoshi Ohta
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Patent number: 10011693Abstract: [Problem] To provide polypropylene for a microporous film having excellent heat resistance and strength. [Solution] Polypropylene for a microporous film satisfying the following requirements (1) and (2): (1) the weight-average molecular weight (Mw) value, as determined by gel permeation chromatography (GPC), is not less than 100,000 but less than 800,000, the value (Mw/Mn) obtained by dividing the weight-average molecular weight by the number-average molecular weight is more than 7.0 but not more than 12.0, and the value (Mz/Mw) obtained by dividing the Z-average molecular weight by the weight-average molecular weight is not less than 3.8 but not more than 9.0, and (2) the mesopentad fraction, as measured by 13C-NMR (nuclear magnetic resonance method), is not less than 95.5%.Type: GrantFiled: October 23, 2013Date of Patent: July 3, 2018Assignee: PRIME POLYMER CO., LTD.Inventors: Yoshio Yanagishita, Chikara Satou, Satoshi Tamura, Katsutoshi Ohta
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Publication number: 20170190891Abstract: Provided are a propylene homopolymer composition for a capacitor film, from which a thin film can be easily produced and which can provide a film with excellent high-temperature voltage resistance, a method for producing the same, and a capacitor film. The propylene homopolymer composition for a capacitor film contains 1% by mass or more and less than 50% by mass of a propylene homopolymer (A1) having predetermined characteristics and more than 50% by mass and 99% by mass or less of a propylene homopolymer (B1) having predetermined characteristics, and has (i) a melt flow rate (MFR) of 1.0 to 10.0 g/10 min and (ii) a chlorine content of 2 ppm by mass or less.Type: ApplicationFiled: July 30, 2015Publication date: July 6, 2017Applicants: MITSUI CHEMICALS, INC., PRIME POLYMER CO., LTD.Inventor: Katsutoshi OHTA
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Publication number: 20170183488Abstract: Provided are a propylene homopolymer composition for a capacitor film, which can provide a film with excellent high-temperature voltage resistance and excellent thin-film stretchability, a method for producing the same, and a capacitor film. The propylene homopolymer composition for a capacitor film contains 50 to 99% by mass of a propylene homopolymer (A1) having predetermined characteristics and 1 to 50% by mass of a propylene homopolymer (B1) having predetermined characteristics, and has (i) a melt flow rate (MFR) of 1.0 to 10.0 g/10 min and (ii) a chlorine content of 2 ppm by mass or less.Type: ApplicationFiled: July 30, 2015Publication date: June 29, 2017Applicants: MITSUI CHEMICALS, INC., PRIME POLYMER CO., LTD.Inventor: Katsutoshi OHTA
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Publication number: 20150274908Abstract: [Problem] To provide polypropylene for a microporous film having excellent heat resistance and strength. [Solution] Polypropylene for a microporous film satisfying the following requirements (1) and (2): (1) the weight-average molecular weight (Mw) value, as determined by gel permeation chromatography (GPC), is not less than 100,000 but less than 800,000, the value (Mw/Mn) obtained by dividing the weight-average molecular weight by the number-average molecular weight is more than 7.0 but not more than 12.0, and the value (Mz/Mw) obtained by dividing the Z-average molecular weight by the weight-average molecular weight is not less than 3.8 but not more than 9.0, and (2) the mesopentad fraction, as measured by 13C-NMR (nuclear magnetic resonance method), is not less than 95.5%.Type: ApplicationFiled: October 23, 2013Publication date: October 1, 2015Applicant: Prime Polymer Co., Ltd.Inventors: Yoshio Yanagishita, Chikara Satou, Satoshi Tamura, Katsutoshi Ohta
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Patent number: 8214104Abstract: In an abnormal noise inspection method for an anti-vibration device for vehicle use, it is determined whether, during travel of a vehicle in which a supported member is supported to the vehicle body by an anti-vibration device, abnormal noise occurs or not in the passenger compartment owing to the anti-vibration device.Type: GrantFiled: March 7, 2008Date of Patent: July 3, 2012Assignee: Kabushiki Kako Co., Ltd.Inventors: Katsutoshi Ohta, Minoru Katayama, Takashi Moriya, Yoshinori Fujinami, Tetsuya Miyake
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Patent number: 8025273Abstract: In a liquid-filled anti-vibration mounting device suitable such as for an engine mount, an accommodation room containing a rubber movable plate is formed inside a partition member partitioning a liquid chamber into a pressure receiving chamber and a balancing chamber. The partition member includes a pair of division walls, one adjoining the pressure receiving chamber and the other adjoining the balancing chamber. Each division wall is formed with a plurality of communication holes. The communication holes are arranged to undulate at least a portion of the movable plate towards the peripheral edge thereof at specified circumferential intervals or greater by the action of the liquid pressure through the communication holes. The movable plate thus deformed, particularly its portion towards the peripheral edge, has a small area to come into contact with the division walls at a time, which effectively disperses and lessens a shock due to contact.Type: GrantFiled: November 14, 2007Date of Patent: September 27, 2011Assignee: Kurashiki Kako Co., Ltd.Inventors: Minoru Katayama, Katsutoshi Ohta, Sumio Uchida, Yoshiharu Yamamoto
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Publication number: 20090310452Abstract: An optical disc signal processing apparatus is provided which comprises a rotation control section for measuring and outputting the number of edges within a predetermined time for a binary signal obtained from an RF signal reproduced from an optical disc on which information is recorded, a detecting section for detecting a missing portion of the RF signal, and a parameter control section for, when a missing portion of the RF signal is not detected, calculating and outputting a rotation control parameter for controlling a rotation of the optical disc based on the number of edges obtained by the rotation control section, and when a missing portion of the RF signal is detected, controlling the rotation control parameter so that an influence of the missing portion of the RF signal is suppressed.Type: ApplicationFiled: August 20, 2009Publication date: December 17, 2009Applicant: Panasonic CorporationInventors: Tadayoshi ISHIKAWA, Kouji KITAMURA, Noriaki SASAKI, Katsutoshi OHTA
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Publication number: 20080290573Abstract: In a liquid-filled anti-vibration mounting device suitable such as for an engine mount, an accommodation room containing a rubber movable plate is formed inside a partition member partitioning a liquid chamber into a pressure receiving chamber and a balancing chamber. The partition member includes a pair of division walls, one adjoining the pressure receiving chamber and the other adjoining the balancing chamber. Each division wall is formed with a plurality of communication holes. The communication holes are arranged to undulate at least a portion of the movable plate towards the peripheral edge thereof at specified circumferential intervals or greater by the action of the liquid pressure through the communication holes. The movable plate thus deformed, particularly its portion towards the peripheral edge, has a small area to come into contact with the division walls at a time, which effectively disperses and lessens a shock due to contact.Type: ApplicationFiled: November 14, 2007Publication date: November 27, 2008Applicant: KURASHIKI KAKO CO., LTD.Inventors: Minoru KATAYAMA, Katsutoshi OHTA, Sumio UCHIDA, Yoshiharu YAMAMOTO
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Publication number: 20080262672Abstract: In an abnormal noise inspection method for a anti-vibration device for vehicle use, it is determined whether, during travel of a vehicle in which a supported member is supported to the vehicle body by an anti-vibration device, abnormal noise occurs or not in the passenger compartment owing to the anti-vibration device.Type: ApplicationFiled: March 7, 2008Publication date: October 23, 2008Applicant: KURASHIKI KAKO CO., LTD.Inventors: Katsutoshi OHTA, Minoru KATAYAMA, Takashi MORIYA, Yoshinori FUJINAMI, Tetsuya MIYAKE
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Patent number: 7296650Abstract: An oscillation limiting mechanism 4 is integrally provided to an engine mount 3 (a vibration proof mount device) of a power plant P mounted on an automobile in a traverse mount fashion. Not only is a stopper metal member 40 in the shape of an inverted U letter disposed so as to cross over a mount body portion 30, but a stopper rubber 42 is formed so that it protrudes from the rear end of a casing of the mount body portion 30 toward the rear side of the vehicle body. Not only is a hollow portion 43 formed in the interior of the stopper rubber 42, but a metal core body 44 is also embedded in the stopper rubber 42 so as to be revolvable around an axis in the vehicle body traverse direction as if it were a link.Type: GrantFiled: April 19, 2006Date of Patent: November 20, 2007Assignee: Kurashiki Kako Co., Ltd.Inventors: Katsutoshi Ohta, Sumio Uchida, Tetsuya Miyake
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Publication number: 20060285456Abstract: An optical disc signal processing apparatus is provided which comprises a rotation control section for measuring and outputting the number of edges within a predetermined time for a binary signal obtained from an RF signal reproduced from an optical disc on which information is recorded, a detecting section for detecting a missing portion of the RF signal, and a parameter control section for, when a missing portion of the RF signal is not detected, calculating and outputting a rotation control parameter for controlling a rotation of the optical disc based on the number of edges obtained by the rotation control section, and when a missing portion of the RF signal is detected, controlling the rotation control parameter so that an influence of the missing portion of the RF signal is suppressed.Type: ApplicationFiled: June 15, 2006Publication date: December 21, 2006Inventors: Tadayoshi Ishikawa, Kouji Kitamura, Noriaki Sasaki, Katsutoshi Ohta
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Publication number: 20060255515Abstract: An oscillation limiting mechanism 4 is integrally provided to an engine mount 3 (a vibration proof mount device) of a power plant P mounted on an automobile in a traverse mount fashion. Not only is a stopper metal member 40 in the shape of an inverted U letter disposed so as to cross over a mount body portion 30, but a stopper rubber 42 is formed so that it protrudes from the rear end of a casing of the mount body portion 30 toward the rear side of the vehicle body. Not only is a hollow portion 43 formed in the interior of the stopper rubber 42, but a metal core body 44 is also embedded in the stopper rubber 42 so as to be revolvable around an axis in the vehicle body traverse direction as if it were a link.Type: ApplicationFiled: April 19, 2006Publication date: November 16, 2006Applicant: KURASHIKI KAKO CO., LTD.Inventors: Katsutoshi Ohta, Sumio Uchida, Tetsuya Miyake
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Patent number: 7111705Abstract: An oscillation limiting mechanism (4) is integrally provided to an engine mount (3) (a vibration proof mount device) of a power plant (P) mounted on an automobile in a traverse mount fashion. Not only is a stopper metal member (40) in the shape of an inverted U letter disposed so as to cross over a mount body portion (30), but a stopper rubber (42) is formed so that it protrudes from the rear end of a casing of the mount body portion (30) toward the rear side of the vehicle body. Not only is a hollow portion (43) formed in the interior of the stopper rubber (42), but a metal core body (44) is also embedded in the stopper rubber (42) so as to be revolvable around an axis in the vehicle body traverse direction as if it were a link.Type: GrantFiled: March 29, 2004Date of Patent: September 26, 2006Assignee: Kurashiki Kako Co., Ltd.Inventors: Katsutoshi Ohta, Sumio Uchida, Tetsuya Miyake
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Publication number: 20050190659Abstract: To allow high speed search for audio files described in a play list and to quickly perform reproduction of the audio files according to the play list even when a plurality of audio files are recorded on a recording medium, a matching comparison unit for performing a search for a file name described in the play list from file names included in a file name list is provided in a signal processing circuit for performing processing such as decoding of an audio file. When reproduction using the play list is instructed, respective file numbers of the audio files detected in the search by the matching comparison unit are output to a control circuit.Type: ApplicationFiled: March 1, 2005Publication date: September 1, 2005Inventors: Futoshi Shirakihara, Katsutoshi Ohta, Takeshi Fujita, Tomoko Sogabe
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Publication number: 20050167898Abstract: An oscillation limiting mechanism 4 is integrally provided to an engine mount 3 (a vibration proof mount device) of a power plant P mounted on an automobile in a traverse mount fashion. Not only is a stopper metal member 40 in the shape of an inverted U letter disposed so as to cross over a mount body portion 30, but a stopper rubber 42 is formed so that it protrudes from the rear end of a casing of the mount body portion 30 toward the rear side of the vehicle body. Not only is a hollow portion 43 formed in the interior of the stopper rubber 42, but a metal core body 44 is also embedded in the stopper rubber 42 so as to be revolvable around an axis in the vehicle body traverse direction as if it were a link.Type: ApplicationFiled: March 29, 2004Publication date: August 4, 2005Applicant: KURASHIKI KAKO CO., LTD.Inventors: Katsutoshi Ohta, Sumio Uchida, Tetsuya Miyake
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Publication number: 20050033000Abstract: The ethylene base copolymer of the present invention having a density d falling in a range of 940 to 970 kg/m3, a polydispersion index PDI falling in a range of 25 to 50 and a long chain branch index LCBI falling in a range of 0.6 to 2.0 has a high impact strength and few fish eyes and is excellent in a high extruding characteristic, a high-speed moldability, a bubble stability and a tear strength in molding, and it can be produced via at least two steps of reaction by a slurry polymerization method using a Ziegler catalyst.Type: ApplicationFiled: August 19, 2002Publication date: February 10, 2005Inventors: Katsutoshi Ohta, Hiroyuki Higuchi, Shiniiro Fujikawa, Masayuki Shinohara
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Publication number: 20040236041Abstract: The present invention is directed to a polyethylene resin having a density of 940-970 kg/m3 and a long-term relaxation component index of 1.5-10. The polyethylene resin exhibits, among other properties, excellent extrudability and bubble stability during blow film extrusion, and well-balanced physical properties of a film; e.g., impact resistance, and in particular, low unevenness in thickness. The polyethylene resin can provide a blown film having few gels.Type: ApplicationFiled: January 5, 2004Publication date: November 25, 2004Inventors: Hiroyuki Higuchi, Katsutoshi Ohta, Masayuki Shinohara
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Publication number: 20040166267Abstract: The pipe of the present invention comprises an ethylene base polymer comprising ethylene and an &agr;-olefin having 3 to 20 carbon atoms, wherein (A) a maximum value of the residual stress is 0.13 MPa or less; (B) the crystallinity is 0.630 to 0.850; (C) a gradient of the crystallinity against a thickness of the pipe is 0.465 or less; and (D) the pipe has a thickness of 5 to 50 mm. It is excellent in a durability, a rigidity and an impact resistance and suited to uses for large diameter pipes receiving a high internal pressure.Type: ApplicationFiled: February 10, 2004Publication date: August 26, 2004Applicants: Idemitsu Petrochemical Co., Ltd., Kurimoto, Ltd.Inventors: Katsutoshi Ohta, Shigeru Murakami, Ryouichi Nakano