Patents by Inventor Makoto Mishiro
Makoto Mishiro 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: 10377635Abstract: When a raw material graphite film bad in flatness is laminated onto another material, creases and other defects may be caused. In particular, when a graphite film having a large area is laminated, defects such as creases may be often caused. In order to solve such defects, a flatness correction treatment step is performed wherein a raw material graphite film is subjected to heat treatment up to 2000° C. or higher while a pressure is applied thereto. This flatness correction treatment gives a graphite film good in flatness. Furthermore, when the flatness of the raw material graphite film is corrected by use of a thermal expansion of a core, a graphite film small in sagging can be obtained.Type: GrantFiled: October 15, 2014Date of Patent: August 13, 2019Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Takashi Inada, Yasushi Nishikawa
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Patent number: 9845267Abstract: Provided is a long and large-area graphite film having improved thermal diffusivity and flex resistance, and accompanied by ameliorated ruffling. According to a method for producing a graphite film, in which graphitization of a heat-treated film consisting of a carbonized polymer film is carried out in a state being wrapped around an internal core, the method being characterized in that a heat treatment is executed by controlling distance(s) between the internal core and the film, and/or between the layers of the film, a graphite film accompanied by significantly ameliorated ruffling can be obtained.Type: GrantFiled: January 13, 2016Date of Patent: December 19, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Makoto Mishiro, Takashi Inada, Yasushi Nishikawa
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Patent number: 9776927Abstract: Provided is a long and large-area graphite film having improved thermal diffusivity and flex resistance, and accompanied by ameliorated ruffling. According to a method for producing a graphite film, in which graphitization of a heat-treated film consisting of a carbonized polymer film is carried out in a state being wrapped around an internal core, the method being characterized in that a heat treatment is executed by controlling distance(s) between the internal core and the film, and/or between the layers of the film, a graphite film accompanied by significantly ameliorated ruffling can be obtained.Type: GrantFiled: January 13, 2016Date of Patent: October 3, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Makoto Mishiro, Takashi Inada, Yasushi Nishikawa
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Patent number: 9682542Abstract: A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, these defects can be prevented by using a graphite film that satisfies the following requirements: 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and 2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.Type: GrantFiled: December 16, 2015Date of Patent: June 20, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa, Takashi Inada
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Patent number: 9637386Abstract: A graphite film which is low in graphite dust generation can be produced by properly selecting acid dianhydride and diamine which constitute a polyimide film, which polyimide film is a raw material of the graphite film. Specifically, the graphite film which is low in graphite dust generation can be obtained if (1) the acid dianhydride is PMDA and the diamine has a molar ratio of ODA/PDA in a range of 100:0 to 80:20, or (2) the acid dianhydride has a molar ratio of PMDA/BPDA in a range of 80:20 to 50:50, and the diamine has a molar ratio of ODA/PDA in a range of 30:70 to 90:10.Type: GrantFiled: November 28, 2016Date of Patent: May 2, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa
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Publication number: 20170106641Abstract: A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, these defects can be prevented by using a graphite film that satisfies the following requirements: 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and 2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.Type: ApplicationFiled: December 16, 2015Publication date: April 20, 2017Inventors: Yusuke Ohta, Takashi lnada, Makoto Mishiro, Yasushi Nishikawa, Takashi lnada
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Publication number: 20170073231Abstract: A graphite film which is low in graphite dust generation can be produced by properly selecting acid dianhydride and diamine which constitute a polyimide film, which polyimide film is a raw material of the graphite film. Specifically, the graphite film which is low in graphite dust generation can be obtained if (1) the acid dianhydride is PMDA and the diamine has a molar ratio of ODA/PDA in a range of 100:0 to 80:20, or (2) the acid dianhydride has a molar ratio of PMDA/BPDA in a range of 80:20 to 50:50, and the diamine has a molar ratio of ODA/PDA in a range of 30:70 to 90:10.Type: ApplicationFiled: November 28, 2016Publication date: March 16, 2017Inventors: Yusuke Ohta, Takashi lnada, Makoto Mishiro, Yasushi Nishikawa
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Patent number: 9540285Abstract: A graphite film which is low in graphite dust generation can be produced by properly selecting acid dianhydride and diamine which constitute a polyimide film, which polyimide film is a raw material of the graphite film. Specifically, the graphite film which is low in graphite dust generation can be obtained if (1) the acid dianhydride is PMDA and the diamine has a molar ratio of ODA/PDA in a range of 100:0 to 80:20, or (2) the acid dianhydride has a molar ratio of PMDA/BPDA in a range of 80:20 to 50:50, and the diamine has a molar ratio of ODA/PDA in a range of 30:70 to 90:10.Type: GrantFiled: August 19, 2011Date of Patent: January 10, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa
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Patent number: 9512005Abstract: In a method for producing a carbonaceous film in which a polymer film is wrapped around a core and is subjected to a heat treatment, material film surfaces during the carbonization step are prevented from fusion, whereby a long carbonaceous having a large area film is obtained. Fusion can be prevented by subjecting a polymer film to a heat treatment under a reduced pressure, and under a reduced pressure while allowing an inert gas to flow. The range of the pressure reduction is preferably ?0.08 MPa to ?0.01 kPa. It is preferred to carry out carbonization with the pressure reduced in the range of from ?0.08 MPa to ?0.01 kPa while allowing an inert gas to flow.Type: GrantFiled: September 5, 2014Date of Patent: December 6, 2016Assignee: KANEKA CORPORATIONInventors: Takashi Inada, Yasushi Nishikawa, Makoto Mishiro
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Publication number: 20160194204Abstract: Provided is a long and large-area graphite film having improved thermal diffusivity and flex resistance, and accompanied by ameliorated ruffling. According to a method for producing a graphite film, in which graphitization of a heat-treated film consisting of a carbonized polymer film is carried out in a state being wrapped around an internal core, the method being characterized in that a heat treatment is executed by controlling distance(s) between the internal core and the film, and/or between the layers of the film, a graphite film accompanied by significantly ameliorated ruffling can be obtained.Type: ApplicationFiled: January 13, 2016Publication date: July 7, 2016Inventors: Yusuke Ohta, Makoto Mishiro, Takashi lnada, Yasushi Nishikawa
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Publication number: 20160194250Abstract: Provided is a long and large-area graphite film having improved thermal diffusivity and flex resistance, and accompanied by ameliorated ruffling. According to a method for producing a graphite film, in which graphitization of a heat-treated film consisting of a carbonized polymer film is carried out in a state being wrapped around an internal core, the method being characterized in that a heat treatment is executed by controlling distance(s) between the internal core and the film, and/or between the layers of the film, a graphite film accompanied by significantly ameliorated ruffling can be obtained.Type: ApplicationFiled: January 13, 2016Publication date: July 7, 2016Inventors: Yusuke Ohta, Makoto Mishiro, Takashi lnada, Yasushi Nishikawa
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Patent number: 9266736Abstract: Provided is a long and large-area graphite film having improved thermal diffusivity and flex resistance, and accompanied by ameliorated ruffling. According to a method for producing a graphite film, in which graphitization of a heat-treated film consisting of a carbonized polymer film is carried out in a state being wrapped around an internal core, the method being characterized in that a heat treatment is executed by controlling distance(s) between the internal core and the film, and/or between the layers of the film, a graphite film accompanied by significantly ameliorated ruffling can be obtained.Type: GrantFiled: June 22, 2009Date of Patent: February 23, 2016Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Makoto Mishiro, Takashi Inada, Yasushi Nishikawa
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Publication number: 20160046435Abstract: Disclosed herein is a method for producing an elongated (rolled) carbonaceous film by polymer pyrolysis while suppressing the fusion bonding of the carbonaceous film. The method for producing a carbonaceous film includes the step of heat-treating a polymer film wound into a roll, wherein the heat treatment is performed after the polymer film is wound into a roll to have a gap between adjacent layers of the polymer film at a temperature lower than a pyrolysis onset temperature of the polymer film so that the roll of polymer film as a whole satisfies a relationship that a value obtained by dividing a thickness of a gap between adjacent layers of the polymer film (Ts) by a thickness of the polymer film (Tf) (Ts/Tf) is 0.16 or higher but 1.50 or lower.Type: ApplicationFiled: October 8, 2015Publication date: February 18, 2016Applicant: KANEKA CORPORATIONInventors: Makoto MISHIRO, Yusuke OHTA, Takashi INADA, Yasushi NISHIKAWA
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Patent number: 9249024Abstract: A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, these defects can be prevented by using a graphite film that satisfies the following requirements: 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and 2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.Type: GrantFiled: February 14, 2011Date of Patent: February 2, 2016Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa, Takashi Inada
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Patent number: 9249025Abstract: Disclosed herein is a method for producing a roll-shaped carbonaceous film by polymer pyrolyzis while suppressing the occurrence of fusion bonding in the roll-shaped carbonaceous film. The carbonaceous film production method includes the step of heat-treating a polymer film wound into a roll, wherein, at a temperature equal to or higher than the pyrolyzis onset temperature of the polymer film but equal to or lower than a temperature at which the weight of the polymer film is reduced by 40% as compared to that before heat treatment, the roll-shaped polymer film has (2-1) a gap between layers of the polymer film so that a value determined for the whole roll-shaped polymer film by dividing the thickness of the gap between adjacent layers of the polymer film (Ts) by the thickness of the polymer film (Tf) (Ts/Tf) satisfies a relationship of 0.33?Ts/Tf?1.Type: GrantFiled: July 25, 2012Date of Patent: February 2, 2016Assignee: KANEKA CORPORATIONInventors: Makoto Mishiro, Yusuke Ohta, Takashi Inada, Yasushi Nishikawa
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Patent number: 9193592Abstract: The present invention performs special heat treatment on a polymer film in a temperature range from (i) a lower limit to temperature rise being equal to or higher than a starting temperature of thermal decomposition of the polymer film, i.e., which is a temperature observed at an early stage of the thermal decomposition of the polymer film, to (ii) an upper limit to temperature rise being equal to or lower than an intermediate temperature of thermal decomposition of the polymer film. This reduces foaming in the film during graphitization treatment following the special heat treatment. Thus, even with a higher heating rate for graphitization, it is possible to produce a graphite film having good quality.Type: GrantFiled: May 4, 2015Date of Patent: November 24, 2015Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa
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Patent number: 9187331Abstract: Disclosed herein is a method for producing an elongated (rolled) carbonaceous film by polymer pyrolysis while suppressing the fusion bonding of the carbonaceous film. The method for producing a carbonaceous film includes the step of heat-treating a polymer film wound into a roll, wherein the heat treatment is performed after the polymer film is wound into a roll to have a gap between adjacent layers of the polymer film at a temperature lower than a pyrolysis onset temperature of the polymer film so that the roll of polymer film as a whole satisfies a relationship that a value obtained by dividing a thickness of a gap between adjacent layers of the polymer film (Ts) by a thickness of the polymer film (Tf) (Ts/Tf) is 0.16 or higher but 1.50 or lower.Type: GrantFiled: March 26, 2012Date of Patent: November 17, 2015Assignee: KANEKA CORPORATIONInventors: Makoto Mishiro, Yusuke Ohta, Takashi Inada, Yasushi Nishikawa
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Publication number: 20150232341Abstract: The present invention performs special heat treatment on a polymer film in a temperature range from (i) a lower limit to temperature rise being equal to or higher than a starting temperature of thermal decomposition of the polymer film, i.e., which is a temperature observed at an early stage of the thermal decomposition of the polymer film, to (ii) an upper limit to temperature rise being equal to or lower than an intermediate temperature of thermal decomposition of the polymer film. This reduces foaming in the film during graphitization treatment following the special heat treatment. Thus, even with a higher heating rate for graphitization, it is possible to produce a graphite film having good quality.Type: ApplicationFiled: May 4, 2015Publication date: August 20, 2015Applicant: KANEKA CORPORATIONInventors: Yusuke OHTA, Takashi INADA, Makoto MISHIRO, Yasushi NISHIKAWA
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Patent number: 9067185Abstract: The present invention performs special heat treatment on a polymer film in a temperature range from (i) a lower limit to temperature rise being equal to or higher than a starting temperature of thermal decomposition of the polymer film, i.e., which is a temperature observed at an early stage of the thermal decomposition of the polymer film, to (ii) an upper limit to temperature rise being equal to or lower than an intermediate temperature of thermal decomposition of the polymer film. This reduces foaming in the film during graphitization treatment following the special heat treatment. Thus, even with a higher heating rate for graphitization, it is possible to produce a graphite film having good quality.Type: GrantFiled: March 26, 2012Date of Patent: June 30, 2015Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa
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Patent number: 8999286Abstract: A graphite film with fewer wrinkles and/or undulations is obtained providing two or more stages of heating space and carrying out continuous baking. Especially when a cooling space is provided between each of the heating spaces and another, a graphite film can be obtained which is excellent in flatness and has a high thermal diffusivity.Type: GrantFiled: March 15, 2012Date of Patent: April 7, 2015Assignee: Kaneka CorporationInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa