Patents by Inventor Akihiro Maezawa

Akihiro Maezawa 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).

  • Publication number: 20200338218
    Abstract: The present invention addresses the problem of providing: a hydrogel particle which can be taken into a cell by the action of the cell and can control the release of a magnetic particle enclosed therein into the cell so as to retain the magnetic particle in the cell for a long period; a method for producing the hydrogel particle; a cell or a cell structure each enclosing the hydrogel particle therein; and a method for evaluating the activity of a cell using the hydrogel particle. The present invention solves the problem by a hydrogel particle including: a domain which is composed of a first hydrogel; a matrix which encloses the domain and is composed of a second hydrogel having a different crosslinking degree or composition from that of the first hydrogel; and a magnetic particle which is supported by at least the first hydrogel.
    Type: Application
    Filed: November 5, 2018
    Publication date: October 29, 2020
    Inventors: Makoto MOCHIZUKI, Chie INUI, Natsumi HIRAYAMA, Akihiro MAEZAWA, Yasuhiko TABATA
  • Publication number: 20200268912
    Abstract: The purpose of the present invention is to provide composite particles for imaging that have high biodegradability after imaging. To achieve the above purpose, the composite particles for imaging according to the present invention are configured such that the ratio (long-term residual amount/short-term residual amount) of a long-term residual amount, which is the average value of the contrast rate after six days in a cell and the contrast rate after 11 days in a cell of the same type, and a short-term residual amount, which is the contrast rate after two days in a cell of the same type, is less than 99%.
    Type: Application
    Filed: October 19, 2018
    Publication date: August 27, 2020
    Inventors: Chie INUI, Yasuhiko TABATA, Akihiro MAEZAWA, Makoto MOCHIZUKI, Natsumi HIRAYAMA
  • Patent number: 10677732
    Abstract: A detection chip includes: a liquid container; and a light-transmitting substrate in which one of two surfaces facing each other faces an inside of the liquid container and an LSPR structure that generates localized surface plasmon resonance by light irradiation is disposed on the other surface of the two surfaces or in a region sandwiched between the one surface and the other surface.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: June 9, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Chie Osawa, Akihiro Maezawa, Makoto Mochizuki
  • Publication number: 20200030248
    Abstract: Disclosed herein are gelatin particles that have been crosslinked without using a crosslinking agent and are easily taken up by cells themselves, and a method for producing such gelatin particles. The gelatin particles are made of self-crosslinked gelatin and have a particle diameter of 0.010 ?m or more but 5.0 ?m or less. The gelatin particles can be produced by discharging droplets of a liquid containing melted gelatin into air in a heating tube or a drying chamber and drying the droplets to form the gelatin into particles under conditions where a difference between the temperature in the heating tube or the drying chamber and the temperature of the liquid is 235° C. or less and further by crosslinking the gelatin forming the particles.
    Type: Application
    Filed: October 4, 2019
    Publication date: January 30, 2020
    Inventors: Chie INUI, Akihiro MAEZAWA, Yasuhiko TABATA, Natsumi HIRAYAMA
  • Patent number: 10286522
    Abstract: A method for collecting an abrasive from an abrasive slurry which has been used for polishing an object including silicon as a main component includes: (i) adding a solvent to the abrasive slurry; (ii) dissolving particles of the polished object among components of the polished object contained in the abrasive slurry; and (iii) filtering the abrasive slurry to collect the abrasive, in which the steps (i) to (iii) are carried out without a pH adjuster to remove components of the polished object to collect the abrasive.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: May 14, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Chie Inui, Akihiro Maezawa, Yuuki Nagai, Natsumi Hirayama
  • Patent number: 10266725
    Abstract: A method for preparing a recycled abrasive slurry includes: polishing a material to be polished, which includes silicon as a main component, with an abrasive slurry including a plurality of kinds of additives added for different purposes; and preparing a recycled abrasive slurry from a collected abrasive slurry collected after the polishing, wherein the recycled abrasive slurry is prepared through: step 1 of removing, from the collected abrasive slurry, at least an additive B capable of decreasing a polishing rate among the plurality of additives, and step 2 of replenishing at least an additive A capable of increasing a polishing rate among the plurality of additives, to the abrasive slurry from which an additive has been removed, which has been prepared in step 1.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: April 23, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Chie Inui, Akihiro Maezawa, Yuuki Nagai, Natsumi Hirayama
  • Publication number: 20190101530
    Abstract: An object of the invention is to provide an antibody dispersion for measurement, in which an antibody is favorably dispersed when used for a measurement, a production method thereof, a kit for preparing an antibody dispersion for measurement, and a measuring method of a biological substance. An antibody dispersion for measurement of the invention includes a monovalent metal salt and a divalent metal salt, in which the concentration of the monovalent metal salt is from 50 to 500 mM and the concentration of the divalent metal salt is from 1.0 to 50 mM.
    Type: Application
    Filed: September 24, 2018
    Publication date: April 4, 2019
    Applicant: Konica Minolta, Inc.
    Inventors: Chie INUI, Akihiro MAEZAWA
  • Publication number: 20190008789
    Abstract: Disclosed herein are gelatin particles that have been crosslinked without using a crosslinking agent and are easily taken up by cells themselves, and a method for producing such gelatin particles. The gelatin particles are made of self-crosslinked gelatin and have a particle diameter of 0.010 ?m or more but 5.0 ?m or less. The gelatin particles can be produced by discharging droplets of a liquid containing melted gelatin into air in a heating tube or a drying chamber and drying the droplets to form the gelatin into particles under conditions where a difference between the temperature in the heating tube or the drying chamber and the temperature of the liquid is 235° C. or less and further by crosslinking the gelatin forming the particles.
    Type: Application
    Filed: December 19, 2016
    Publication date: January 10, 2019
    Inventors: Chie INUI, Akihiro MAEZAWA, Yasuhiko TABATA, Natsumi HIRAYAMA
  • Publication number: 20190002530
    Abstract: Disclosed herein are gelatin particles including gelatin, wherein when a major-axis length of dried gelatin particles is defined as a and a major-axis length of gelatin particles after swelling treatment obtained by immersing the dried gelatin particles in water at 40° C. under an atmospheric pressure for 60 minutes is defined as b, swelling degree represented by b/a is 1.0 or more but 10.0 or less, and wherein the gelatin particles after swelling treatment have a particle diameter of 1.0 nm or more but 5.0 ?m or less. The gelatin particles are easily taken up by cells themselves.
    Type: Application
    Filed: December 19, 2016
    Publication date: January 3, 2019
    Inventors: Chie INUI, Akihiro MAEZAWA, Yasuhiko TABATA
  • Publication number: 20190003968
    Abstract: A detection chip includes: a liquid container; and a light-transmitting substrate in which one of two surfaces facing each other faces an inside of the liquid container and an LSPR structure that generates localized surface plasmon resonance by light irradiation is disposed on the other surface of the two surfaces or in a region sandwiched between the one surface and the other surface.
    Type: Application
    Filed: June 25, 2018
    Publication date: January 3, 2019
    Inventors: Chie Osawa, Akihiro Maezawa, Makoto Mochizuki
  • Publication number: 20180339399
    Abstract: An object of the present invention is to provide an abrasive slurry regeneration method capable of efficiently regenerating an abrasive slurry having a high polishing rate. The abrasive slurry regeneration method is an abrasive slurry regeneration method for polishing a polishing target containing silicon oxide as a main component using an abrasive slurry containing abrasive particles and a plurality of kinds of additives and then regenerating a collected abrasive slurry, characterized by including a regeneration step of collecting an additive having a molecular weight of 500 or more and an additive adsorbed by the abrasive particles among additives contained in the collected abrasive slurry together with the abrasive particles while an abrasive concentration (% by mass) is maintained within a range of 0.2 to 3000% with respect to an abrasive concentration (% by mass) of an unused abrasive slurry when being used for polishing a polishing target.
    Type: Application
    Filed: December 1, 2016
    Publication date: November 29, 2018
    Inventors: Chie INUI, Akihiro MAEZAWA, Yuuki NAGAI, Natsumi HIRAYAMA
  • Patent number: 10047262
    Abstract: An object of the present invention is to provide a cerium oxide abrasive material containing cerium oxide abrasive particles prepared by a synthetic method using an aqueous solution of a salt of a rare earth element and a precipitant, the cerium oxide abrasive particles having a spherical shape and high polishing performance (polishing rate and polishing precision of the polished surface), a method for producing the cerium oxide abrasive material, and a polishing method. The cerium oxide abrasive material according to the present invention comprises spherical cerium oxide abrasive particles prepared by a synthetic method using an aqueous solution of a salt of a rare earth element and a precipitant, wherein the cerium oxide abrasive particles have a spherical shape having an average aspect ratio within the range of 1.00 to 1.15.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: August 14, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Keisuke Mizoguchi, Akihiro Maezawa, Atsushi Takahashi, Natsuki Ito, Natsumi Hirayama, Hideaki Wakamatsu
  • Patent number: 10017675
    Abstract: Method for separating a polishing material, which is capable of separating and recovering cerium oxide from a used polishing material that is mainly composed of cerium oxide and a regenerated polishing material which can be obtained by the separation method. This method for separating a polishing material is characterized in that a divalent alkaline earth metal salt is added into the slurry of the used polishing material, while controlling the temperature of the slurry within the range of 10-70 DEG C., thereby causing the polishing material to aggregate under such conditions that the mother liquor has a pH of less than 10.0 as the pH is converted to one at 25 DEG C. so that the polishing material is separated from the mother liquor.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: July 10, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Atsushi Takahashi, Yuuki Nagai, Akihiro Maezawa
  • Patent number: 10011752
    Abstract: A production method for polishing-material particles, comprising: forming an inner layer having, as a main component thereof, a salt of at least one element selected from Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, In, Sn, Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, W, Bi, Th, and the alkali earth metals; adding a prepared aqueous solution, at a prescribed time, to a reaction solution in which the salt formed from the element is dispersed, to form an outer layer on the outer side of the inner layer; using solid-liquid separation to separate a polishing-material-particle precursor from the reaction solution, and the polishing-material-particle precursor is baked; and the percentage of Ce in the reaction solution in which the surface of the outer layer is formed is in the range of 60-90 mol % inclusive.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: July 3, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Atsushi Takahashi, Natsuki Ito, Keisuke Mizoguchi, Akihiro Maezawa
  • Publication number: 20180056483
    Abstract: A method for collecting an abrasive from an abrasive slurry which has been used for polishing an object including silicon as a main component includes: (i) adding a solvent to the abrasive slurry; (ii) dissolving particles of the polished object among components of the polished object contained in the abrasive slurry; and (iii) filtering the abrasive slurry to collect the abrasive, in which the steps (i) to (iii) are carried out without a pH adjuster to remove components of the polished object to collect the abrasive.
    Type: Application
    Filed: March 9, 2016
    Publication date: March 1, 2018
    Inventors: Chie INUI, Akihiro MAEZAWA, Yuuki NAGAI, Natsumi HIRAYAMA
  • Publication number: 20180044198
    Abstract: The present invention addresses the problem of providing spherical zinc oxide particles which have an average particle diameter within a specific range, have excellent monodispersity, and have a high plasmon resonance intensity. Also provided are a process for producing the spherical zinc oxide particles and a plasmon sensor chip obtained using the spherical zinc oxide particles, the chip having high sensitivity and being reduced in angle dependence during measurement. The spherical zinc oxide particles have been doped with one or more metallic elements selected from the group consisting of gallium (Ga), europium (Eu), cerium (Ce), praseodymium (Pr), samarium (Sm), gadolinium (Gd), terbium (Tb), neodymium (Nd), and ytterbium (Yb), have an average particle diameter within the range of 50 to 5,000 nm, and have a variation coefficient in particle diameter distribution within the range of 1.0 to 10%.
    Type: Application
    Filed: March 2, 2016
    Publication date: February 15, 2018
    Inventors: Natsuki ITO, Akihiro MAEZAWA, Keisuke MIZOGUCHI
  • Publication number: 20180022789
    Abstract: Gelatin particles include: gelatin that serves as a main component; and an auxiliary component carried on the gelatin, the gelatin particles being configured such that where the particle size of the gelatin particles is X, the ratio A/B of the average concentration A (mass %) of the auxiliary component contained in a surface part having a thickness of 0.01X from the surface of the gelatin particles based on the total mass of the gelatin particles to the average concentration B (mass %) of the auxiliary component contained in an inner part of the particles deeper than the surface part based on the total mass of the gelatin particles is less than 0.25.
    Type: Application
    Filed: July 14, 2017
    Publication date: January 25, 2018
    Inventors: Natsumi HIRAYAMA, Chie INUI, Akihiro MAEZAWA, Yasuhiko TABATA
  • Patent number: 9868187
    Abstract: A diamond abrasive recovery method in which diamond abrasive is recovered from polishing material slurry including diamond abrasive used for polishing a polishing target mainly composed of silicon. The method comprises (1) recovering polishing material slurry including the used diamond abrasive; (2) adding inorganic salt including a metallic element which is to be a divalent or trivalent cation to the recovered polishing material slurry to aggregate the diamond abrasive and separating a supernatant liquid from a diamond abrasive included dispersion medium; and (3) extracting diamond abrasive from the separated diamond abrasive included dispersion medium using a low polarity dispersion medium.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: January 16, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yuuki Nagai, Akihiro Maezawa, Chie Inui
  • Patent number: 9868885
    Abstract: Disclosed are polishing material particles which have polishing performance suitable for precision polishing and also have a high polishing speed and high monodispersibility; a polishing material containing the polishing material particles; and a polishing processing method using the polishing material. The polishing material particles are spherical particles having an average aspect ratio of 1.00 to 1.15, wherein the particle diameter (D50 (nm)) of the polishing material particles as determined from a particle diameter cumulative distribution curve falls within the range from 50 to 1500 nm. The average content of cerium or the total content of cerium and at least one element selected from lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm) and europium (Eu) in the polishing material particles is 81 mol % or more relative to the total content of all of rare earth elements that constitute the polishing material particles.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: January 16, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Keisuke Mizoguchi, Akihiro Maezawa, Natsuki Ito, Atsushi Takahashi, Hideaki Wakamatsu, Yuuki Nagai, Chie Inui
  • Patent number: 9850413
    Abstract: In order to use less cerium oxide and achieve higher durability and polishing speeds, these abrasive particles used in an abrasive have: a shell layer (3) which is the outermost shell layer of the abrasive particles and is formed with cerium oxide as the main component; and a middle layer (2) which contains cerium oxide and an oxide of at least one element selected from Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, In, Sn, Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, W, Bi, Th, and the alkali earth metals, and which is formed closer to the center of the abrasive particles than the shell layer (3).
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: December 26, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Atsushi Takahashi, Natsuki Ito, Akihiro Maezawa