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公开(公告)号：US20230303997A1
公开(公告)日：2023-09-28
申请号：US18189506
申请日：2023-03-24
Applicant: SEIKO EPSON CORPORATION
Inventor： Michio NAKAMORI , Masato HANAMURA
CPC classification number: C12N15/1013 , B01D15/206 , B01D15/424 , B03C1/01 , B03C1/02 , B01D15/3885 , B03C2201/18 , B03C2201/20
Abstract: A biological material extraction carrier includes a magnetic bead including a magnetic metal powder and a first coating layer that coats a particle surface of the magnetic metal powder and that is made of a first oxide material, and an oxide powder, in which a particle surface is made of a second oxide material, and an average particle diameter is smaller than that of the magnetic bead. Further, the average particle diameter of the magnetic bead is preferably 0.5 μm or more and 50 μm or less.
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2.发明申请公开(公告)号：US20230025505A1
公开(公告)日：2023-01-26
申请号：US17814989
申请日：2022-07-26
Applicant: SEIKO EPSON CORPORATION
Inventor： Hirofumi HOKARI , Michio NAKAMORI , Yasunari IKEDA
Abstract: A filtration separator for magnetic particles includes a storage tank that stores a liquid in which magnetic particles are dispersed, and that has a bottom portion and a side wall portion, a stirring mechanism having a rotating shaft portion inserted into the storage tank in a direction crossing a face of the bottom portion, and a stirring impeller that is coupled to the rotating shaft portion and that stirs the liquid by rotation of the rotating shaft portion, a magnet mechanism that is provided in at least a part of the side wall portion, and that can switch a magnetic force in the storage tank between an on state and an off state, and that adsorb the magnetic particles in the liquid to the side wall portion when it is in the on state, and a filtration mechanism having a filter provided in the bottom portion of the storage tank, and a discharge port from which the liquid after passing through the filter is discharged.
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公开(公告)号：US20230087918A1
公开(公告)日：2023-03-23
申请号：US17948411
申请日：2022-09-20
Applicant: SEIKO EPSON CORPORATION
Inventor： Yasunari IKEDA , Michio NAKAMORI , Hirofumi HOKARI , Masato HANAMURA
Abstract: A magnetic bead reagent contains: a magnetic bead containing a Fe-based metal soft magnetic particle and a silica film that has an average thickness of 20 nm or more and that covers the Fe-based metal soft magnetic particle; a surfactant; and a dispersion medium in which the magnetic bead is dispersed. The surfactant may be a nonionic surfactant.
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公开(公告)号：US20200207999A1
公开(公告)日：2020-07-02
申请号：US16727048
申请日：2019-12-26
Applicant: Seiko Epson Corporation
Inventor： Hisashi OKAMURA , Hiroko HAYASHI , Kenji KITADA , Yasunari IKEDA , Hirofumi HOKARI , Shinichi YAMAMOTO , Michio NAKAMORI , Shigeki KAWADA , Kenta KIKUCHI , Kazumasa OTSUKI , Seiji KAGAMI , Shinichi NAITO
IPC: C09D11/322 , C08L39/00 , C08L71/02
Abstract: An aqueous ink jet composition contains: C.I. Disperse Red 364; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of the ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of the polyalkylene glycol; and an anionic dispersant.
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公开(公告)号：US20240383768A1
公开(公告)日：2024-11-21
申请号：US18665867
申请日：2024-05-16
Applicant: SEIKO EPSON CORPORATION
Inventor： Michio NAKAMORI
Abstract: A magnetic bead includes: a magnetic metal particle; and a coating layer covering a surface of the magnetic metal particle and containing an inorganic oxide. A specific surface area A measured by a gas adsorption method is 0.3 m2/g or more and 10.0 m2/g or less, and a ratio A/B1 of the specific surface area A to a specific surface area B1 calculated based on a volume-based particle size distribution is 1.00 or more and 9.00 or less.
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Patent Agency Ranking
公开(公告)号：US20240376575A1
公开(公告)日：2024-11-14
申请号：US18655460
申请日：2024-05-06
Applicant: SEIKO EPSON CORPORATION
Inventor： Fumio TAKAGI , Michio NAKAMORI
Abstract: A magnetic bead includes: a magnetic metal particle; and a coating layer that covers a surface of the magnetic metal particle, contains an inorganic oxide, and has an average thickness of 15 nm or more, in which, when the magnetic bead is subjected to an operation of mixing 0.1 g of ethylenediaminetetraacetic acid (EDTA), 5 mL of pure water, and 100 mg of the magnetic bead to prepare a first mixture, an operation of mixing the first mixture with 5 mL of hydrochloric acid having a concentration of 10 mM to obtain a second mixture, and then stirring the second mixture with a vortex mixer for 30 minutes, and an operation of allowing the stirred second mixture to stand for one day, then collecting a supernatant, and measuring a metal ion concentration of the supernatant by high-frequency inductively coupled plasma (ICP) emission spectroscopy, the metal ion concentration of the supernatant is 0.01 ppm or more and 5.00 ppm or less.
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公开(公告)号：US20200207997A1
公开(公告)日：2020-07-02
申请号：US16727020
申请日：2019-12-26
Applicant: Seiko Epson Corporation
Inventor： Yasunari IKEDA , Hirofumi HOKARI , Shinichi YAMAMOTO , Shigeki KAWADA , Michio NAKAMORI
IPC: C09D11/322 , C08K5/42 , C08L25/08 , C08L41/00 , C08K5/45
Abstract: An aqueous ink jet composition according to the present disclosure includes: C.I. Disperse Red 364 as a first component; a second component which is a dispersant having a chemical structure of at least one of a sulfo group and a salt thereof; and a third component having an indigo skeleton and a chemical structure of at least one of a sulfo group and a salt thereof.
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公开(公告)号：US20230307161A1
公开(公告)日：2023-09-28
申请号：US18188593
申请日：2023-03-23
Applicant: SEIKO EPSON CORPORATION
Inventor： Michio NAKAMORI , Yasunari IKEDA , Sukenori ICHIKAWA
IPC: H01F1/147
CPC classification number: H01F1/14766
Abstract: A magnetic bead includes: a magnetic metal powder; and a coating layer that covers a particle surface of the magnetic metal powder, has an average thickness of 20 nm or more, and is made of an oxide material. A coercive force is 1.0 Oe, which is equal to 80 A/m, or less. The magnetic metal powder may contain an amorphous structure or a nanocrystalline structure. The magnetic metal powder may be made of an alloy containing Fe as a main component.
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公开(公告)号：US20230082684A1
公开(公告)日：2023-03-16
申请号：US17897355
申请日：2022-08-29
Applicant: SEIKO EPSON CORPORATION
Inventor： Michio NAKAMORI , Masato HANAMURA , Yasunari IKEDA
Abstract: A magnetic bead separation method includes: storing, in a container, a mixed liquid containing a magnetic bead and a liquid containing target molecules, and adsorbing the target molecules on the magnetic bead, the magnetic bead containing a Fe-based metal soft magnetic particle and a coating film with which the Fe-based metal soft magnetic particle is coated, and having a saturation magnetization of 50 emu/g or more and 250 emu/g or less; applying an external magnetic field to the container and magnetically attracting at least a part of the magnetic bead by the external magnetic field; and applying an acceleration to the container while the magnetic bead is magnetically attracted by the external magnetic field and desorbing the liquid adhering to the magnetic bead.
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公开(公告)号：US20210024764A1
公开(公告)日：2021-01-28
申请号：US16934109
申请日：2020-07-21
Applicant: Seiko Epson Corporation
Inventor： Michio NAKAMORI , Shinichi YAMAMOTO , Yasunari IKEDA
IPC: C09D11/328 , C09D11/102
Abstract: An aqueous ink jet composition of the present disclosure includes at least one specific dye selected from the group consisting of C.I. Disperse Orange 25 and C.I. Disperse Brown 27; an anionic dispersant; and a material A which is at least one compound selected from the group consisting of a polyalkylene glycol, a derivative thereof, and a phenyl azo compound different from the specific dye.
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