Patents by Inventor Tomohisa Yokomizo
Tomohisa Yokomizo 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: 11925740Abstract: A blood processing filter includes a container having 2 ports respectively functioning as an inlet for a liquid to be processed and as an outlet for the processed liquid, and a filtration medium filled in the container, wherein an airflow resistance of the filtration medium is 55.0 kPa·s/m or more and less than 85.0 kPa·s/m, the filtration medium includes a filter material A having an airflow resistance per unit basis weight of 0.01 kPa·s·m/g or more and less than 0.04 kPa·s·m/g and a filter material B having an airflow resistance per unit basis weight of 0.04 kPa·s·m/g or more, at least a part of the filter material A is disposed on a side closer to the inlet for a liquid to be processed than the filter material B, and a sum of airflow resistances of the filter material A is 6.0 kPa·s/m or more.Type: GrantFiled: August 29, 2019Date of Patent: March 12, 2024Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventors: Kazuhiko Nakamura, Tomohisa Yokomizo, Takako Kai
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Publication number: 20230099894Abstract: The present invention has an object to provide a blood processing filter that is excellent in the filtration rate. The object can be solved by a blood processing filter comprising a container having an inlet and an outlet for blood, and a filter medium disposed between the inlet and the outlet of the container, wherein the filter medium comprises a filter element, an average thickness of the filter medium is 7 to 12 mm, and a standard deviation in thickness of the filter medium is 0.30 to 0.80 mm.Type: ApplicationFiled: March 2, 2021Publication date: March 30, 2023Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventors: Akiko YOSHIDA, Kazuhiko NAKAMURA, Tomohisa YOKOMIZO
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Publication number: 20230077172Abstract: A blood treatment filter comprising a filter element, an inlet-side flexible container and an outlet-side flexible container, an inlet port, and a tubular outlet port, further comprises: an outlet-side frame sheet disposed between the filter element and the outlet-side flexible container; a first seal portion provided by sealing at least the filter element and the outlet-side frame sheet in a belt-shaped manner; and an annular second seal portion provided to surround the first seal portion, wherein on an outlet side of the filter element, a valley portion is formed at the first seal portion, the outlet port includes a protruding portion that protrudes to an inside of the container, and the protruding portion is provided with an opening at least a part of which overlaps with the first seal portion and which can communicate with a gap region formed by the valley portion.Type: ApplicationFiled: September 2, 2022Publication date: March 9, 2023Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa YOKOMIZO, Tomoko UCHIYAMA
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Patent number: 11504460Abstract: A blood treatment filter comprising a filter element, an inlet-side flexible container and an outlet-side flexible container, an inlet port, and a tubular outlet port, further comprises: an outlet-side frame sheet disposed between the filter element and the outlet-side flexible container; a first seal portion provided by sealing at least the filter element and the outlet-side frame sheet in a belt-shaped manner; and an annular second seal portion provided to surround the first seal portion, wherein on an outlet side of the filter element, a valley portion is formed at the first seal portion, the outlet port includes a protruding portion that protrudes to an inside of the container, and the protruding portion is provided with an opening at least a part of which overlaps with the first seal portion and which can communicate with a gap region formed by the valley portion.Type: GrantFiled: July 15, 2020Date of Patent: November 22, 2022Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa Yokomizo, Tomoko Uchiyama
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Patent number: 11471580Abstract: A blood treatment filter comprising a filter element, an inlet-side flexible container and an outlet-side flexible container, an inlet port, and a tubular outlet port, further comprises: an outlet-side frame sheet disposed between the filter element and the outlet-side flexible container; a first seal portion provided by sealing at least the filter element and the outlet-side frame sheet in a belt-shaped manner; and an annular second seal portion provided to surround the first seal portion, wherein on an outlet side of the filter element, a valley portion is formed at the first seal portion, the outlet port includes a protruding portion that protrudes to an inside of the container, and the protruding portion is provided with an opening at least a part of which overlaps with the first seal portion and which can communicate with a gap region formed by the valley portion.Type: GrantFiled: July 15, 2020Date of Patent: October 18, 2022Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa Yokomizo, Tomoko Uchiyama
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Publication number: 20210316049Abstract: A blood processing filter includes a container having 2 ports respectively functioning as an inlet for a liquid to be processed and as an outlet for the processed liquid, and a filtration medium filled in the container, wherein an airflow resistance of the filtration medium is 55.0 kPa·s/m or more and less than 85.0 kPa·s/m, the filtration medium includes a filter material A having an airflow resistance per unit basis weight of 0.01 kPa·s·m/g or more and less than 0.04 kPa·s·m/g and a filter material B having an airflow resistance per unit basis weight of 0.04 kPa·s·m/g or more, at least a part of the filter material A is disposed on a side closer to the inlet for a liquid to be processed than the filter material B, and a sum of airflow resistances of the filter material A is 6.0 kPa·s/m or more.Type: ApplicationFiled: August 29, 2019Publication date: October 14, 2021Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventors: Kazuhiko NAKAMURA, Tomohisa YOKOMIZO, Takako KAI
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Patent number: 10842927Abstract: A blood treatment filter comprising a filter element, an inlet-side flexible container and an outlet-side flexible container, an inlet port, and a tubular outlet port, further comprises: an outlet-side frame sheet disposed between the filter element and the outlet-side flexible container; a first seal portion provided by sealing at least the filter element and the outlet-side frame sheet in a belt-shaped manner; and an annular second seal portion provided to surround the first seal portion, wherein on an outlet side of the filter element, a valley portion is formed at the first seal portion, the outlet port includes a protruding portion that protrudes to an inside of the container, and the protruding portion is provided with an opening at least a part of which overlaps with the first seal portion and which can communicate with a gap region formed by the valley portion.Type: GrantFiled: March 10, 2015Date of Patent: November 24, 2020Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa Yokomizo, Tomoko Uchiyama
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Publication number: 20200345921Abstract: A blood treatment filter comprising a filter element, an inlet-side flexible container and an outlet-side flexible container, an inlet port, and a tubular outlet port, further comprises: an outlet-side frame sheet disposed between the filter element and the outlet-side flexible container; a first seal portion provided by sealing at least the filter element and the outlet-side frame sheet in a belt-shaped manner; and an annular second seal portion provided to surround the first seal portion, wherein on an outlet side of the filter element, a valley portion is formed at the first seal portion, the outlet port includes a protruding portion that protrudes to an inside of the container, and the protruding portion is provided with an opening at least a part of which overlaps with the first seal portion and which can communicate with a gap region formed by the valley portion.Type: ApplicationFiled: July 15, 2020Publication date: November 5, 2020Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa YOKOMIZO, Tomoko UCHIYAMA
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Patent number: 10188782Abstract: A blood processing filter comprises an inlet-side flexible container and an outlet-side flexible container that sandwich a filter element, an inlet port, and an outlet port, the filter further comprising: a flow path securing sheet; a first seal portion; and a second seal portion, wherein the flow path securing sheet includes a pair of ribs disposed opposite to each other with the outlet port interposed therebetween, and a slit formed inside of the pair of ribs, and diffusing openings that are disposed outside of the pair of ribs and continuously open from the ribs to the lateral portions of the first seal portion.Type: GrantFiled: October 2, 2014Date of Patent: January 29, 2019Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa Yokomizo, Tomoko Uchiyama
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Patent number: 10117987Abstract: In the removal of white blood cells from blood, the efficiency of white blood cell removal by a filter is improved. Centrifugal force is applied to blood placed in a blood bag by centrifugal separation to form a plurality of separation layers having a concentration gradient of white blood cells. The separation layers are passed through a filter in ascending order of white blood cell concentration to remove the white blood cells from the separation layers. The separation layers from which the white blood cells have been removed are received in a first blood component bag.Type: GrantFiled: July 27, 2015Date of Patent: November 6, 2018Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventors: Shuichiro Inadome, Nobukazu Shimada, Tomohisa Yokomizo
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Patent number: 9872945Abstract: A blood treatment filter including: a filter container that introduces blood from an inlet into an internal space, and discharges treated blood from an outlet; a filter material that is housed in the filter container to partition the internal space into an inlet side space and an outlet side space, and filters the passing blood to remove a specific component; an inlet port that forms an inlet channel through which the blood flowing from the inlet to the internal space passes; an outlet port that forms an outlet channel through which the blood flowing from the internal space to the outlet passes, wherein the outlet channel has a tapered outlet passage with an inner diameter increasing from the internal space side toward the outlet side.Type: GrantFiled: July 25, 2013Date of Patent: January 23, 2018Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventor: Tomohisa Yokomizo
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Publication number: 20170014567Abstract: A blood treatment filter comprising a filter element, an inlet-side flexible container and an outlet-side flexible container, an inlet port, and a tubular outlet port, further comprises: an outlet-side frame sheet disposed between the filter element and the outlet-side flexible container; a first seal portion provided by sealing at least the filter element and the outlet-side frame sheet in a belt-shaped manner; and an annular second seal portion provided to surround the first seal portion, wherein on an outlet side of the filter element, a valley portion is fanned at the first seal portion, the outlet port includes a protruding portion that protrudes to an inside of the container, and the protruding portion is provided with an opening at least a part of which overlaps with the first seal portion and which can communicate with a gap region formed by the valley portion.Type: ApplicationFiled: March 10, 2015Publication date: January 19, 2017Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa YOKOMIZO, Tomoko UCHIYAMA
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Patent number: 9474845Abstract: In the removal of white blood cells from blood, the efficiency of white blood cell removal by a filter is improved. Centrifugal force is applied to blood placed in a blood bag by centrifugal separation to form a plurality of separation layers having a concentration gradient of white blood cells. The separation layers are passed through a filter in ascending order of white blood cell concentration to remove the white blood cells from the separation layers. The separation layers from which the white blood cells have been removed are received in a first blood component bag.Type: GrantFiled: March 22, 2011Date of Patent: October 25, 2016Assignee: ASAHI KASEI MEDICAL CO. LTD.Inventors: Shuichiro Inadome, Nobukazu Shimada, Tomohisa Yokomizo
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Patent number: 9421320Abstract: This invention relates to a blood processing filter comprising a sheet-like filter element, an inlet-side flexible container and an outlet-side flexible container that sandwich the filter element and are sealed thereto, an inlet port provided in the inlet-side flexible container for accepting blood before being processed by the filter element, and an outlet port provided in the outlet-side flexible container for discharging blood after being processed by the filter element. The blood processing filter also includes a flow channel securing sheet arranged between the filter element and the outlet-side flexible container. A flow channel hole through which blood processed by the filter element passes is formed in the flow channel securing sheet. The outlet port is provided so as to be capable of communicating with the flow channel hole.Type: GrantFiled: February 3, 2014Date of Patent: August 23, 2016Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa Yokomizo, Morikazu Miura
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Publication number: 20160235904Abstract: A blood processing filter comprises an inlet-side flexible container and an outlet-side flexible container that sandwich a filter element, an inlet port, and an outlet port, the filter further comprising: a flow path securing sheet; a first seal portion; and a second seal portion, wherein the flow path securing sheet includes a pair of ribs disposed opposite to each other with the outlet port interposed therebetween, and a slit formed inside of the pair of ribs, and diffusing openings that are disposed outside of the pair of ribs and continuously open from the ribs to the lateral portions of the first seal portion.Type: ApplicationFiled: October 2, 2014Publication date: August 18, 2016Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa YOKOMIZO, Tomoko UCHIYAMA
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Publication number: 20150328391Abstract: In the removal of white blood cells from blood, the efficiency of white blood cell removal by a filter is improved. Centrifugal force is applied to blood placed in a blood bag by centrifugal separation to form a plurality of separation layers having a concentration gradient of white blood cells. The separation layers are passed through a filter in ascending order of white blood cell concentration to remove the white blood cells from the separation layers. The separation layers from which the white blood cells have been removed are received in a first blood component bag.Type: ApplicationFiled: July 27, 2015Publication date: November 19, 2015Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventors: Shuichiro INADOME, Nobukazu SHIMADA, Tomohisa YOKOMIZO
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Publication number: 20150328392Abstract: In the removal of white blood cells from blood, the efficiency of white blood cell removal by a filter is improved. Centrifugal force is applied to blood placed in a blood bag by centrifugal separation to form a plurality of separation layers having a concentration gradient of white blood cells. The separation layers are passed through a filter in ascending order of white blood cell concentration to remove the white blood cells from the separation layers. The separation layers from which the white blood cells have been removed are received in a first blood component bag.Type: ApplicationFiled: July 27, 2015Publication date: November 19, 2015Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventors: Shuichiro INADOME, Nobukazu SHIMADA, Tomohisa YOKOMIZO
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Publication number: 20150265756Abstract: A blood treatment filter including: a filter container that introduces blood from an inlet into an internal space, and discharges treated blood from an outlet; a filter material that is housed in the filter container to partition the internal space into an inlet side space and an outlet side space, and filters the passing blood to remove a specific component; an inlet port that forms an inlet channel through which the blood flowing from the inlet to the internal space passes; an outlet port that forms an outlet channel through which the blood flowing from the internal space to the outlet passes, wherein the outlet channel has a tapered outlet passage with an inner diameter increasing from the internal space side toward the outlet side.Type: ApplicationFiled: July 25, 2013Publication date: September 24, 2015Applicant: ASAHI KASEI MEDICAL CO., LTD.Inventor: Tomohisa Yokomizo
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Patent number: 9114205Abstract: The preservation liquid addition system of the present invention enables a chemical liquid to be added to a blood cell component both easily and in a short period of time. The preservation liquid addition system is able to be placed on a centrifugal separator. The preservation liquid addition system has a blood bag, a preservation liquid bag, a mixed liquid bag, a first flow path and a static mixer. A blood component in the blood bag and a preservation liquid in the preservation liquid bag are sent to the static mixer through the first flow path, and a mixed liquid mixed by the static mixer is sent to the mixed liquid bag by centrifugal force of the centrifugal separator.Type: GrantFiled: March 16, 2011Date of Patent: August 25, 2015Assignee: ASAHI KASEI MEDICAL CO., LTD.Inventors: Tomohisa Yokomizo, Shuichiro Inadome
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Patent number: 8881914Abstract: This invention relates to a blood processing filter comprising a sheet-like filter element, an inlet-side flexible container and an outlet-side flexible container that sandwich the filter element and are sealed thereto, an inlet port provided in the inlet-side flexible container for accepting blood before being processed by the filter element, and an outlet port provided in the outlet-side flexible container for discharging blood after being processed by the filter element. The blood processing filter also includes a flow channel securing sheet arranged between the filter element and the outlet-side flexible container. A flow channel hole through which blood processed by the filter element passes is formed in the flow channel securing sheet. The outlet port is provided so as to be capable of communicating with the flow channel hole.Type: GrantFiled: September 20, 2011Date of Patent: November 11, 2014Assignee: Asahi Kasei Medical Co., Ltd.Inventors: Tomohisa Yokomizo, Morikazu Miura