Patents by Inventor Masatoshi Hashino
Masatoshi Hashino 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: 11338253Abstract: The porous hollow fiber membrane of the present invention contains a thermoplastic resin, and includes a surface having a surface porosity of 32 to 60% and a fine pore diameter of 300 nm or less, and has a compressive strength of 0.7 MPa or more. The porous hollow fiber membrane of the present invention may include at least two layers, and in this case, the surface of one layer has a thickness of backbone of 0.3 to 20 ?m and a fine pore diameter of 0.3 to 10 ?m, and the surface of the other layer has a surface porosity of 32 to 60% and a fine pore diameter of 0.05 to 0.3 ?m.Type: GrantFiled: July 20, 2020Date of Patent: May 24, 2022Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Daisuke Okamura, Yuki Miki, Masatoshi Hashino
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Patent number: 10974204Abstract: A porous membrane has a thickness of 150 ?m or greater. The pore diameters of a first surface are smaller than the pore diameters of a second surface. The average value of the pore diameters of the first surface is 60 nm or less, and the coefficient of variation of the pore diameters is 10% or greater and 50% or less.Type: GrantFiled: June 14, 2017Date of Patent: April 13, 2021Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Yuki Miki, Daisuke Okamura, Hirokazu Fujimura, Masatoshi Hashino
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Publication number: 20200346173Abstract: The porous hollow fiber membrane of the present invention contains a thermoplastic resin, and includes a surface having a surface porosity of 32 to 60% and a fine pore diameter of 300 nm or less, and has a compressive strength of 0.7 MPa or more. The porous hollow fiber membrane of the present invention may include at least two layers, and in this case, the surface of one layer has a thickness of backbone of 0.3 to 20 ?m and a fine pore diameter of 0.3 to 10 ?m, and the surface of the other layer has a surface porosity of 32 to 60% and a fine pore diameter of 0.05 to 0.3 ?m.Type: ApplicationFiled: July 20, 2020Publication date: November 5, 2020Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Daisuke OKAMURA, Yuki MIKI, Masatoshi HASHINO
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Patent number: 10751671Abstract: The porous hollow fiber membrane of the present invention contains a thermoplastic resin, and includes a surface having a surface porosity of 32 to 60% and a fine pore diameter of 300 nm or less, and has a compressive strength of 0.7 MPa or more. The porous hollow fiber membrane of the present invention may include at least two layers, and in this case, the surface of one layer has a thickness of backbone of 0.3 to 20 ?m and a fine pore diameter of 0.3 to 10 ?m, and the surface of the other layer has a surface porosity of 32 to 60% and a fine pore diameter of 0.05 to 0.3 ?m.Type: GrantFiled: September 18, 2014Date of Patent: August 25, 2020Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Daisuke Okamura, Yuki Miki, Masatoshi Hashino
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Publication number: 20190247801Abstract: A porous membrane has a thickness of 150 ?m or greater. The pore diameters of a first surface are smaller than the pore diameters of a second surface. The average value of the pore diameters of the first surface is 60 nm or less, and the coefficient of variation of the pore diameters is 10% or greater and 50% or less.Type: ApplicationFiled: June 14, 2017Publication date: August 15, 2019Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Yuki MIKI, Daisuke OKAMURA, Hirokazu FUJIMURA, Masatoshi HASHINO
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Publication number: 20190076790Abstract: When the porous membrane, which has two surfaces of a surface A and a surface C, is equally divided in the thickness direction of the porous membrane into three layers of a first layer including the surface A, a second layer that is a central layer in the thickness direction, and a third layer including the surface C, an average trunk size of the third layer is larger than an average trunk size of the second layer, and when a continuous layer from the surface A having a thickness of 10 ?m in the first layer is a first layer component, a continuous layer component having a thickness of 10 ?m and an average trunk size smaller than an average trunk size of the first layer component is present in the first layer, the second layer, and the third layer other than the first layer component.Type: ApplicationFiled: March 9, 2017Publication date: March 14, 2019Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Chihiro SAKAKIBARA, Masatoshi HASHINO, Hirokazu FUJIMURA
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Patent number: 9821501Abstract: Methods of producing a deformed porous hollow fiber membrane by thermally induced phase separation, particularly by discharging a fusion kneaded product containing a thermoplastic resin and an organic liquid through an orifice of a hollow fiber-forming deformed nozzle; cooling and solidifying the fusion kneaded product discharged through the deformed nozzle to form the product into a hollow fiber-like material having a deformed cross section at a cross section vertical to a discharging direction; and extracting away the organic liquid from the hollow fiber-like material to obtain the deformed porous hollow fiber membrane, wherein an inorganic fine powder is kneaded in the fusion kneaded product.Type: GrantFiled: January 22, 2015Date of Patent: November 21, 2017Assignee: ASAHI KASEI CHEMICALS CORPORATIONInventors: Hirokazu Fujimura, Masatoshi Hashino, Noboru Kubota, Hideto Matsuyama
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Patent number: 9511529Abstract: A porous hollow fiber membrane that is suitable for treatment of liquid containing an inorganic substance and/or an organic substance, is obtained at a low cost performance, and has high water permeability performance, fretting resistance, and drying resistance. A deformed porous hollow fiber membrane according to the present invention is composed of a thermoplastic resin and includes a continuous asperity provided on the periphery in the longitudinal direction of the membrane, in which the periphery of the hollow fiber membrane in the circumferential direction includes continuous projected and depressed parts.Type: GrantFiled: August 13, 2010Date of Patent: December 6, 2016Assignee: ASAHI KASEI CHEMICALS CORPORATIONInventors: Hirokazu Fujimura, Masatoshi Hashino, Noboru Kubota, Hideto Matsuyama
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Publication number: 20160325237Abstract: The porous hollow fiber membrane of the present invention contains a thermoplastic resin, and includes a surface having a surface porosity of 32 to 60% and a fine pore diameter of 300 nm or less, and has a compressive strength of 0.7 MPa or more. The porous hollow fiber membrane of the present invention may include at least two layers, and in this case, the surface of one layer has a thickness of backbone of 0.3 to 20 ?m and a fine pore diameter of 0.3 to 10 ?m, and the surface of the other layer has a surface porosity of 32 to 60% and a fine pore diameter of 0.05 to 0.3 ?m.Type: ApplicationFiled: September 18, 2014Publication date: November 10, 2016Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Daisuke OKAMURA, Yuki MIKI, Masatoshi HASHINO
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Publication number: 20150174809Abstract: Methods of producing a deformed porous hollow fiber membrane by thermally induced phase separation, particularly by discharging a fusion kneaded product containing a thermoplastic resin and an organic liquid through an orifice of a hollow fiber-forming deformed nozzle; cooling and solidifying the fusion kneaded product discharged through the deformed nozzle to form the product into a hollow fiber-like material having a deformed cross section at a cross section vertical to a discharging direction; and extracting away the organic liquid from the hollow fiber-like material to obtain the deformed porous hollow fiber membrane, wherein an inorganic fine powder is kneaded in the fusion kneaded product.Type: ApplicationFiled: January 22, 2015Publication date: June 25, 2015Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Hirokazu FUJIMURA, Masatoshi HASHINO, Noboru KUBOTA, Hideto MATSUYAMA
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Publication number: 20120125850Abstract: A porous hollow fiber membrane that is suitable for treatment of liquid containing an inorganic substance and/or an organic substance, is obtained at a low cost performance, and has high water permeability performance, fretting resistance, and drying resistance. A deformed porous hollow fiber membrane according to the present invention is composed of a thermoplastic resin and includes a continuous asperity provided on the periphery in the longitudinal direction of the membrane, in which the periphery of the hollow fiber membrane in the circumferential direction includes continuous projected and depressed parts.Type: ApplicationFiled: August 13, 2010Publication date: May 24, 2012Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Hirokazu Fujimura, Masatoshi Hashino, Noboru Kubota, Hideto Matsuyama
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Patent number: 8137800Abstract: A porous hollow fiber membrane which has high blocking performance and high water permeability suitable for filtration and the like and exhibits excellent strength, and a process for stably producing the porous hollow fiber membrane are disclosed. The process utilizes a hollow fiber molding nozzle having two or more circular discharge ports which are disposed concentrically. Multilayer melt-extrusion is performed by discharging molten mixtures which include a thermoplastic resin and an organic liquid and differ in composition from the adjacent discharge ports. The resulting product is cooled to solidify to obtain a hollow fiber. The organic liquid is then removed from the hollow fiber by extraction to produce a porous hollow fiber membrane. The molten mixture discharged from at least one circular discharge port includes an inorganic fine powder in addition to the thermoplastic resin and the organic liquid. The inorganic fine powder is removed by extraction after cooling in addition to the organic liquid.Type: GrantFiled: October 11, 2006Date of Patent: March 20, 2012Assignee: Asahi Kasei Chemicals CorporationInventors: Hirokazu Fujimura, Noboru Kubota, Masatoshi Hashino, Tetsuo Shimizu
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Publication number: 20090297822Abstract: A porous hollow fiber membrane which has high blocking performance and high water permeability suitable for filtration and the like and exhibits excellent strength, and a process for stably producing the porous hollow fiber membrane are disclosed. The process utilizes a hollow fiber molding nozzle having two or more circular discharge ports which are disposed concentrically. Multilayer melt-extrusion is performed by discharging molten mixtures which include a thermoplastic resin and an organic liquid and differ in composition from the adjacent discharge ports. The resulting product is cooled to solidify to obtain a hollow fiber. The organic liquid is then removed from the hollow fiber by extraction to produce a porous hollow fiber membrane. The molten mixture discharged from at least one circular discharge port includes an inorganic fine powder in addition to the thermoplastic resin and the organic liquid. The inorganic fine powder is removed by extraction after cooling in addition to the organic liquid.Type: ApplicationFiled: October 11, 2006Publication date: December 3, 2009Inventors: Hirokazu Fujimura, Noboru Kubota, Masatoshi Hashino, Tetsuo Shimizu
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Patent number: 6494223Abstract: A wet cleaning apparatus can remove trace heavy metals, colloidal matter or other impurities contained in ultra-pure water to be used as rinse water in semiconductor cleaning processes and suppress deposit of trace impurities such as heavy metals or other particles that would otherwise cause characteristics of such devices to deteriorate. A wet cleaning apparatus for rinsing with ultra-pure water as a rinse liquid by supplying ultra-pure water through a piping to a rinse location inside the apparatus. The rinse location is a point of use of the ultra-pure water. The wet cleaning apparatus includes a module filled with porous film in which polymer chains having at least one of an anion exchange group, a cation exchange group, and a chelating group are held in the middle of the piping positioned inside the apparatus. The wet cleaning apparatus further includes a means for adding hydrogen gas to the rinse liquid.Type: GrantFiled: September 22, 2000Date of Patent: December 17, 2002Assignees: Organo CorporationInventors: Tadahiro Ohmi, Kazuhiko Kawada, Toshihiro II, Masatoshi Hashino, Noboru Kubota
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Patent number: D692994Type: GrantFiled: May 9, 2011Date of Patent: November 5, 2013Assignee: Asahi Kasei Chemicals CorporationInventors: Hirokazu Fujimura, Masatoshi Hashino