Patents by Inventor Akira Isogai
Akira Isogai 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: 11969695Abstract: A process for manufacturing a porous body, includes preparing a dispersion liquid having a dispersion medium with cellulose-based nanofibers that have an average fiber diameter from 1 to 100 nm and dispersed therein, attaching the dispersion liquid to a porous support having a plurality of pores that connect with one another, removing the dispersion liquid attached to a surface of the porous support excluding an inside of pores of the porous support, and subsequently drying the porous support including the dispersion liquid in the pores of the porous support to remove the dispersion medium.Type: GrantFiled: April 20, 2020Date of Patent: April 30, 2024Assignees: HOKUETSU CORPORATION, THE UNIVERSITY OF TOKYOInventors: Junji Nemoto, Toshihiko Soyama, Tsuguyuki Saito, Akira Isogai
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Patent number: 11198740Abstract: Disclosed is a dispersion of metal-containing oxidized cellulose nanofibers with superior dispersibility, which is applicable to various uses. The disclosed metal-containing oxidized cellulose nanofiber dispersion comprises a dispersion medium, and metal-containing oxidized cellulose nanofibers containing a metal other than sodium in salt form, wherein the metal-containing oxidized cellulose nanofibers have a number-average fiber diameter of 100 nm or less and an average degree of polymerization of 100 to 2,000.Type: GrantFiled: December 26, 2018Date of Patent: December 14, 2021Assignees: ZEON CORPORATION, THE UNIVERSITY OF TOKYOInventors: Atsushi Sone, Akira Isogai
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Publication number: 20200282983Abstract: When there is a likelihood of an own vehicle colliding with a first object present in a travelling direction of the own vehicle based on detection results from a detecting unit, a brake assistance apparatus determines whether there is an avoidance area, that is an area in which there is no second object in the periphery of the first object present in the travelling direction, is available for avoiding the collision by steering of the own vehicle. When no avoidance area is present, the brake assistance apparatus increases a brake assistance level using a brake assisting unit to be higher than when the avoidance area is present, and causes the brake assisting unit to perform brake assistance. Increasing the brake assistance level includes at least one of: advancing a timing for starting brake assistance of the own vehicle; and increasing the strength of brake assistance of the own vehicle.Type: ApplicationFiled: May 22, 2020Publication date: September 10, 2020Inventors: Yosuke Ito, Akira Isogai, Akihiko Yamamuro, Wataru Ike
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Publication number: 20200246758Abstract: A process for manufacturing a porous body, includes preparing a dispersion liquid having a dispersion medium with cellulose-based nanofibers that have an average fiber diameter from 1 to 100 nm and dispersed therein, attaching the dispersion liquid to a porous support having a plurality of pores that connect with one another, removing the dispersion liquid attached to a surface of the porous support excluding an inside of pores of the porous support, and subsequently drying the porous support including the dispersion liquid in the pores of the porous support to remove the dispersion medium.Type: ApplicationFiled: April 20, 2020Publication date: August 6, 2020Inventors: Junji Nemoto, Toshihiko Soyama, Tsuguyuki Saito, Akira Isogai
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Patent number: 10556197Abstract: A method for manufacturing a filter medium for an air filter having improved particle collection performance using cellulose nanofibers. The method for manufacturing a filter medium for an air filter comprises: causing a mixed solution containing cellulose nanofibers and a dispersion medium to adhere to an air-permeable support; and subsequently freeze-drying the resulting product, in which a number average fiber diameter of the cellulose nanofibers is 1 to 50 nm, the dispersion medium is a mixed dispersion medium of water and a water-soluble organic solvent, and a solid content concentration of the cellulose nanofibers in the mixed solution is 0.001 to 0.150% by mass.Type: GrantFiled: August 3, 2015Date of Patent: February 11, 2020Assignee: HOKUETSU CORPORATIONInventors: Junji Nemoto, Akira Isogai, Tsuguyuki Saito
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Patent number: 10457456Abstract: A gas barrier sheet material which make effective use of natural resources and which has improved gas barrier properties including oxygen barrier properties, water vapor barrier properties and smell barrier properties, and improved flexibility; a barrier container using the same; and a method for fabricating a sheet material. A sheet material is characterized in that a fine fiber layer and a moisture-retaining layer are stacked on at least one surface of a substrate in such a way that the fine fiber layer and the moisture-retaining layer are in direct contact with each other. The invention is more advantageous when using a substrate, e.g. paper, a nonwoven fabric, or a porous membrane, of which surface profile is not flat and which is inherently susceptible to causing troubles in fabrication processes, such as of soaking, wetting and drying during coating of a coating agent.Type: GrantFiled: January 14, 2016Date of Patent: October 29, 2019Assignee: TOPPAN PRINTING CO., LTD.Inventors: Nao Nishijima, Akira Isogai
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Patent number: 10422871Abstract: A vehicle as a moving body is provided with an imaging device as first object detecting means and a radar apparatus as second object detecting means. The object recognition apparatus is provided with axis displacement learning means for learning an axis displacement of the reference axis X1 of the first object detecting means; axis displacement determining means for performing, based on an object detecting result of the first object detecting means and the second object detecting means, an axis displacement determination process for determining whether or not an axis displacement has occurred in the reference axis of the second object detecting means; and disabling means for disabling, based on a learning result of the axis displacement by the axis displacement learning means, information about an axis displacement of the second object detecting means acquired by the axis displacement determination process.Type: GrantFiled: August 4, 2015Date of Patent: September 24, 2019Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yusuke Matsumoto, Ryo Takaki, Akira Isogai, Ichiro Aizawa, Jun Tsuchida, Koichi Sato
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Publication number: 20190127491Abstract: Disclosed is a dispersion of metal-containing oxidized cellulose nanofibers with superior dispersibility, which is applicable to various uses. The disclosed metal-containing oxidized cellulose nanofiber dispersion comprises a dispersion medium, and metal-containing oxidized cellulose nanofibers containing a metal other than sodium in salt form, wherein the metal-containing oxidized cellulose nanofibers have a number-average fiber diameter of 100 nm or less and an average degree of polymerization of 100 to 2,000.Type: ApplicationFiled: December 26, 2018Publication date: May 2, 2019Applicants: ZEON CORPORATION, THE UNIVERSITY OF TOKYOInventors: Atsushi SONE, Akira ISOGAI
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Patent number: 10252715Abstract: A driving assistance apparatus measures a position and a movement direction of a target object present in the periphery of an own vehicle. The driving assistance apparatus performs a driving assistance process of the own vehicle when the measured position of the target object is within a determination area provided in the periphery of the own vehicle. The driving assistance apparatus corrects the determination area in a direction at which the target object is measured, when the target object is determined to be moving towards the determination area based on the measured movement direction of the target object.Type: GrantFiled: July 22, 2015Date of Patent: April 9, 2019Assignee: DENSO CORPORATIONInventors: Akitoshi Minemura, Akira Isogai, Yosuke Ito
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Publication number: 20180200655Abstract: A method for manufacturing a filter medium for an air filter having improved particle collection performance using cellulose nanofibers. The method for manufacturing a filter medium for an air filter comprises: causing a mixed solution containing cellulose nanofibers and a dispersion medium to adhere to an air-permeable support; and subsequently freeze-drying the resulting product, in which a number average fiber diameter of the cellulose nanofibers is 1 to 50 nm, the dispersion medium is a mixed dispersion medium of water and a water-soluble organic solvent, and a solid content concentration of the cellulose nanofibers in the mixed solution is 0.001 to 0.150% by mass.Type: ApplicationFiled: August 3, 2015Publication date: July 19, 2018Applicants: Hokuetsu Kishu Paper Co., Ltd., The University of TokyoInventors: Junji NEMOTO, Akira ISOGAI, Tsuguyuki SAITO
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Patent number: 9901527Abstract: A viscous composition of the present invention comprises specific cellulose fibers (A), (A?) and (A?) and the specific cellulose fibers (A), (A?) and (A?) are used with appropriate selection according to uses of a cosmetic composition, a gel-like composition and a spray composition. Therefore, in case where the composition is used as the cosmetic composition, a cosmetic composition which is excellent in shape retention ability and dispersion stability and excellent in water tolerance to satisfy the properties and the performance which is necessary for cosmetics is obtained. Additionally, in case where the composition is used as a gel-like composition, gel-state can be kept without separation or water release. Furthermore, in case where the composition is used as a spray composition, since it is possible to time-dependently keep stable gel state even if functional additives such as electrolytes, ionic substances, etc.Type: GrantFiled: November 24, 2015Date of Patent: February 27, 2018Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.Inventors: Akira Isogai, Hideyuki Sumi, Yousuke Goi
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Publication number: 20180009911Abstract: Disclosed is a dispersion of metal-containing oxidized cellulose nanofibers with superior dispersibility, which is applicable to various uses. The disclosed metal-containing oxidized cellulose nanofiber dispersion comprises a dispersion medium, and metal-containing oxidized cellulose nanofibers containing a metal other than sodium in salt form, wherein the metal-containing oxidized cellulose nanofibers have a number-average fiber diameter of 100 nm or less.Type: ApplicationFiled: February 4, 2016Publication date: January 11, 2018Applicants: ZEON CORPORATION, THE UNIVERSITY OF TOKYOInventors: Atsushi SONE, Akira ISOGAI
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Patent number: 9801802Abstract: A viscous composition of the present invention comprises specific cellulose fibers (A), (A?) and (A?) and the specific cellulose fibers (A), (A?) and (A?) are used with appropriate selection according to uses of a cosmetic composition, a gel-like composition and a spray composition. Therefore, in case where the composition is used as the cosmetic composition, a cosmetic composition which is excellent in shape retention ability and dispersion stability and excellent in water tolerance to satisfy the properties and the performance which is necessary for cosmetics is obtained. Additionally, in case where the composition is used as a gel-like composition, gel-state can be kept without separation or water release. Furthermore, in case where the composition is used as a spray composition, since it is possible to time-dependently keep stable gel state even if functional additives such as electrolytes, ionic substances, etc.Type: GrantFiled: November 24, 2015Date of Patent: October 31, 2017Assignee: DAI-ICHI KOGYO SEIYAKU CO., LTD.Inventors: Akira Isogai, Hideyuki Sumi, Yousuke Goi
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Publication number: 20170227634Abstract: A vehicle as a moving body is provided with an imaging device as first object detecting means and a radar apparatus as second object detecting means. The object recognition apparatus is provided with axis displacement learning means for learning an axis displacement of the reference axis X1 of the first object detecting means; axis displacement determining means for performing, based on an object detecting result of the first object detecting means and the second object detecting means, an axis displacement determination process for determining whether or not an axis displacement has occurred in the reference axis of the second object detecting means; and disabling means for disabling, based on a learning result of the axis displacement by the axis displacement learning means, information about an axis displacement of the second object detecting means acquired by the axis displacement determination process.Type: ApplicationFiled: August 4, 2015Publication date: August 10, 2017Inventors: Yusuke MATSUMOTO, Ryo TAKAKI, Akira ISOGAI, Ichiro AIZAWA, Jun TSUCHIDA, Koichi SATO
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Publication number: 20170217432Abstract: A driving assistance apparatus measures a position and a movement direction of a target object present in the periphery of an own vehicle. The driving assistance apparatus performs a driving assistance process of the own vehicle when the measured position of the target object is within a determination area provided in the periphery of the own vehicle. The driving assistance apparatus corrects the determination area in a direction at which the target object is measured, when the target object is determined to be moving towards the determination area based on the measured movement direction of the target object.Type: ApplicationFiled: July 22, 2015Publication date: August 3, 2017Inventors: Akitoshi Minemura, Akira Isogai, Yosuke Ito
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Patent number: 9481369Abstract: In a cruise control system installed in a vehicle, a monitoring unit monitors a region predetermined in front of the vehicle when the vehicle is located on a lane of a road. An instruction input unit is configured to allow a driver of the vehicle to input an instruction indicative of driver's recognized information in front of the vehicle. A target determining unit executes determination of a target for adjusting an interval with respect thereto based on a result of the monitor and on the instruction when the instruction is input from the instruction input unit thereto.Type: GrantFiled: November 26, 2007Date of Patent: November 1, 2016Assignee: DENSO CORPORATIONInventors: Akira Isogai, Masao Oooka
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Patent number: 9460627Abstract: A collision determination device is mounted to an own vehicle and determines a probability of a collision with a moving object. The collision determination device determines whether or not an own vehicle will collide with a moving object that is detected within a captured image. The collision determination device determines whether or not the moving object is in a shielded state where at least a portion of the moving object is hidden behind another object or the moving object appears from behind another object. The collision determination device sets an amount of time required for the collision determining means to complete a determination related to the collision to a shorter amount of time when the moving object is in the shielded state, compared to when the moving object is not in the shielded state.Type: GrantFiled: April 23, 2014Date of Patent: October 4, 2016Assignee: DENSO CORPORATIONInventors: Akitoshi Minemura, Akira Isogai, Yoshihisa Ogata
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Publication number: 20160130056Abstract: A gas barrier sheet material which make effective use of natural resources and which has improved gas barrier properties including oxygen barrier properties, water vapor barrier properties and smell barrier properties, and improved flexibility; a barrier container using the same; and a method for fabricating a sheet material. A sheet material is characterized in that a fine fiber layer and a moisture-retaining layer are stacked on at least one surface of a substrate in such a way that the fine fiber layer and the moisture-retaining layer are in direct contact with each other. The invention is more advantageous when using a substrate, e.g. paper, a nonwoven fabric, or a porous membrane, of which surface profile is not flat and which is inherently susceptible to causing troubles in fabrication processes, such as of soaking, wetting and drying during coating of a coating agent.Type: ApplicationFiled: January 14, 2016Publication date: May 12, 2016Applicant: Toppan Printing Co., Ltd.Inventors: Nao NISHIJIMA, Akira ISOGAI
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Patent number: 9328211Abstract: A porous body that contains cellulose nanofibers having very thin fiber diameters and high hydrophilicity, and has a large specific surface area, and to provide a method of producing the porous body simply with low cost. A method of producing a porous cellulose comprises a process of lyophilizing a mixed liquid containing cellulose nanofibers and a dispersion medium, wherein the dispersion medium is a mixed dispersion medium of water and an organic solvent dissolving in water, a concentration of the organic solvent in the mixed dispersion medium is 2 to 40 mass %, and a solid content concentration of the cellulose nanofibers in the mixed liquid is 0.001 to 5 mass %.Type: GrantFiled: May 15, 2013Date of Patent: May 3, 2016Assignees: HOKUETSU KISHU PAPER CO., LTD., THE UNIVERSITY OF TOKYOInventors: Junji Nemoto, Toshihiko Soyama, Akira Isogai, Tsuguyuki Saito
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Method for producing hydrophilized cellulose fiber, and method for reducing oxidized cellulose fiber
Patent number: 9296829Abstract: This invention provides a method for hydrophilic cellulose fibers capable of inhibiting decrease in the degree of polymerization and whiteness degree of oxidized cellulose fibers in oxidized cellulose in which a carbon at position 6 of each glucose unit in the cellulose fiber starting material is oxidized to a carboxyl group, the method comprising (A) the step of performing dehalogenation together with reduction, the dehalogenation comprising mixing a dehalogenation agent, a reducing agent, and oxidized cellulose fibers, and removing halogens remaining in the oxidized cellulose fibers, and the reduction comprising reducing a ketone group at position 2 and/or position 3 of each glucose unit in the oxidized cellulose fibers.Type: GrantFiled: January 18, 2012Date of Patent: March 29, 2016Assignee: GUNZE LIMITEDInventors: Akira Isogai, Chiaki Tanaka, Yoshinari Yui