Patents by Inventor Isao Ishikawa

Isao Ishikawa 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: 20240122557
    Abstract: Provided are an X-ray CT apparatus and a control method of the same capable of reducing focal blur even in a case where an X-ray focal spot is moved. There is provided an X-ray CT apparatus including: an X-ray tube including a cathode that generates an electron beam and an anode that collides with the electron beam to radiate an X-ray; an X-ray detector configured to detect the X-ray; a rotating plate configured to rotate the X-ray tube and the X-ray detector around a subject; and an image processing unit configured to generate a tomographic image of the subject based on projection data acquired by the X-ray detector during rotation of the rotating plate, in which the cathode, which has a plurality of electron sources that are arranged within a plane facing the anode and emit the electron beam, is configured such that a position of an electron source, from which an electron beam is to be emitted, is selectively controlled based on a target position of an X-ray focal spot in the anode.
    Type: Application
    Filed: October 5, 2023
    Publication date: April 18, 2024
    Applicant: FUJIFILM Healthcare Corporation
    Inventors: Isao TAKAHASHI, Takashi ISHIKAWA
  • Publication number: 20230237124
    Abstract: An analysis apparatus according to one embodiment includes: an obtainment unit configured to obtain a data set of multiple data items having randomness; and an analysis unit configured to calculate, as an inner product or a norm of probability measures ? and ? being probability measures on the data set and taking values in a von Neumann algebra, by using a mapping ? that extends kernel mean embedding, an inner product or a norm of ?(?) and ?(?) mapped onto an RKHM.
    Type: Application
    Filed: July 14, 2020
    Publication date: July 27, 2023
    Inventors: Yuka HASHIMOTO, Isao ISHIKAWA, Masahiro Ikeda, Yoshinobu KAWAHARA
  • Publication number: 20230082140
    Abstract: A relationship extraction device includes a memory; and a processor configured to execute obtaining a set of data {x0, . . . , xT?1}?X each having multiple elements and a set of data {y0=f(x0), . . . , yT?1=f(xT?1)}?Y each having multiple elements, where f is any mapping; generating an approximate operator that approximates a Perron-Frobenius operator K satisfying K?1(xt)=?2(yt) for t=0, . . . , T?1, wherein ?1 is a feature mapping with respect to a positive definite kernel function k1 on X×X that takes C*-algebra values, and ?2 is a feature mapping with respect to a positive definite kernel function k2 on Y×Y that takes C*-algebra values; obtaining data xt and xs as targets of relationship extraction; and extracting a relationship between each element of xt and each element of xs by using the approximate operator.
    Type: Application
    Filed: February 22, 2021
    Publication date: March 16, 2023
    Inventors: Yuka HASHIMOTO, Isao ISHIKAWA, Masahiro IKEDA, Yoshinobu KAWAHARA, Takeshi KATSURA, Fuyuta KOMURA
  • Publication number: 20220284332
    Abstract: An anomaly detection apparatus includes an approximation unit configured to generate, based on observed data, an approximation of a Perron-Frobenius operator on an RKHS that represents a mathematical model to generate the observed data; and a detection unit configured to use the approximation of the Perron-Frobenius operator and an observed data item at time t, to predict a data item at time t+1, and based on a discrepancy between the predicted data item and an observed data item at time t+1, to determine whether the observed data item at time t+1 is anomalous.
    Type: Application
    Filed: August 19, 2020
    Publication date: September 8, 2022
    Inventors: Yuka HASHIMOTO, Yoichi Matsuo, Isao ISHIKAWA, Masahiro Ikeda, Yoshinobu KAWAHARA
  • Patent number: 10603410
    Abstract: A complex of implant and cultured periodontal ligament cell sheet, that can be satisfactorily stabilized into the bone through periodontal ligament tissue, is provided. A fixture of the inserted implant is coated with calcium phosphate and the cultured periodontal ligament cell sheet is brought into intimate contact with the implant.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: March 31, 2020
    Assignees: GENERAL INC.
    Inventors: Kaoru Washio, Isao Ishikawa, Teruo Okano, Takao Hanawa, Yusuke Tsutsumi, Yuka Tsumanuma, Supreda Suphanantachat, Kosei Yano
  • Publication number: 20170157292
    Abstract: A complex of implant and cultured periodontal ligament cell sheet, that can be satisfactorily stabilized into the bone through periodontal ligament tissue, is provided. A fixture of the inserted implant is coated with calcium phosphate and the cultured periodontal ligament cell sheet is brought into intimate contact with the implant.
    Type: Application
    Filed: June 24, 2015
    Publication date: June 8, 2017
    Inventors: Kaoru WASHIO, Isao ISHIKAWA, Teruo OKANO
  • Patent number: 9175367
    Abstract: A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/l to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 3, 2015
    Assignee: SHOWA DENKO K.K.
    Inventor: Isao Ishikawa
  • Patent number: 9114192
    Abstract: A cultured periodontal membrane cell sheet, produced through a process comprising culturing cells on a cell culture support composed of a base material having its surface coated with a temperature-responsive polymer of 0˚C to 80˚C upper limit or lower limit critical dissolution temperature in water under specified conditions, (1) regulating the temperature of culture fluid to temperature?the upper limit critical dissolution temperature or?the lower limit critical dissolution temperature, (2) causing a cultured periodontal membrane cell sheet resulting from the culturing to adhere to a carrier, and (3) detaching the sheet together with the carrier. This cultured periodontal membrane cell sheet has a syndesmotic microstructure, exhibiting extremely high bioadherence to the surface of dental root, and realizes high-density transplant of target cells and positive reconstruction of periodontal tissue.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: August 25, 2015
    Assignee: CELLSEED INC.
    Inventors: Teruo Okano, Masateru Hasegawa, Masayuki Yamato, Akihiko Kikuchi, Isao Ishikawa
  • Publication number: 20140186240
    Abstract: A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/l to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: SHOWA DENKO K.K.
    Inventor: Isao ISHIKAWA
  • Patent number: 8679427
    Abstract: A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/l to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: March 25, 2014
    Assignee: Showa Denko K.K.
    Inventor: Isao Ishikawa
  • Publication number: 20100272632
    Abstract: A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/1 to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry.
    Type: Application
    Filed: December 22, 2008
    Publication date: October 28, 2010
    Applicant: Showa Denko K.K.
    Inventor: Isao Ishikawa
  • Publication number: 20090176118
    Abstract: A method for manufacturing an aluminum salt solution includes manufacturing an aluminum salt solution by using, as a raw material, an aluminum hydroxide having T-C (total carbon amount) of 0.04 mass % or less and T-Na2O (total Na2O amount) of less than 0.3 mass %, which is obtained by a Bayer process.
    Type: Application
    Filed: July 4, 2005
    Publication date: July 9, 2009
    Applicant: SHOWA DENKO K.K.
    Inventor: Isao Ishikawa
  • Publication number: 20080118474
    Abstract: A cultured periodontal ligament cell sheet is produced by a process comprising culturing cells on a cell culture support composed of a base material whose surface is coated with a temperature-responsive polymer having an upper limit or lower limit critical dissolution temperature in water of 0 to 80° C. under specified conditions, (1) regulating the temperature of a culture fluid to the upper limit critical dissolution temperature or higher or to the lower limit critical temperature or lower, (2) allowing a cultured periodontal ligament cell sheet resulting from the culturing to adhere to a carrier and (3) detaching the sheet intact together with the carrier. This cultured periodontal ligament cell sheet has a syndesmotic microstructure, exhibits extremely high bioadherence to the dental root surface and realizes high density transplantation of target cells and positive reconstruction of periodontal tissues.
    Type: Application
    Filed: April 25, 2005
    Publication date: May 22, 2008
    Applicant: CELLSEED INC.
    Inventors: Teruo Okano, Masateru Hasegawa, Masayuki Yamato, Akihiko Kikuchi, Isao Ishikawa
  • Patent number: 6669852
    Abstract: In order to provide a method for effectively separating red mud generated during alumina-extraction treatment of an alumina ore containing goethite as an iron component, the alumina ore containing goethite as an iron component is treated with an alkaline solution at 110-160° C., to thereby take up alumina components through extraction, and a settling aid formed of a water-soluble polymer including, as an effective component, a copolymer containing, as a monomer component, a vinylhydroxamic acid compound or a salt thereof (A) and having an average molecular weight of at least 2,000 is added to the resultant extract, to thereby settle the red mud for separation thereof.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: December 30, 2003
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Isao Ishikawa, Haruo Washikita, Yasuo Kawai, Koyuki Mesuda
  • Patent number: 6528028
    Abstract: A process in which alumina is extracted from bauxite with an aqueous alkali solution, and a desilication product is precipitated such that the product is not contained in a bauxite residue and does not form a complex. The desilication product is mixed with a calcium compound, and the mixture is calcined, to thereby solubilize and recover an alkali component of the product. In addition, an alkali component is removed from a residue (a solid product), and the residue is effectively used as a resource.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: March 4, 2003
    Assignee: Showa Denko K.K.
    Inventors: Yoshiyuki Takenaka, Yasuo Kawai, Isao Ishikawa
  • Publication number: 20020096476
    Abstract: In order to provide a method for effectively separating red mud generated during alumina-extraction treatment of an alumina ore containing goethite as an iron component, the alumina ore containing goethite as an iron component is treated with an alkaline solution at 110-160° C., to thereby take up alumina components through extraction, and a settling aid formed of a water-soluble polymer including, as an effective component, a copolymer containing, as a monomer component, a vinylhydroxamic acid compound or a salt thereof (A) and having an average molecular weight of at least 12,000,000 is added to the resultant extract, to thereby settle the red mud for separation thereof.
    Type: Application
    Filed: October 30, 2001
    Publication date: July 25, 2002
    Applicant: SHOWA DENKO KABUSHIKI KAISHA
    Inventors: Isao Ishikawa, Haruo Washikita, Yasuo Kawai, Koyuki Mesuda
  • Publication number: 20010028870
    Abstract: To recycle a residue after treatment of bauxite completely and effectively. To recover alkali which is used for the treatment. When alumina is extracted from bauxite with an alkali aqueous solution, a desilication product is precipitated such that the product is not contained in a bauxite residue and does not form a complex. The desilication product is mixed with a calcium compound, and the mixture is calcined, to thereby solubilize and recover an alkali component of the product. In addition, an alkali component is removed from a residue (a solid product), and the residue is effectively used as a resource.
    Type: Application
    Filed: December 28, 2000
    Publication date: October 11, 2001
    Inventors: Yoshiyuki Takenaka, Yasuo Kawai, Isao Ishikawa
  • Publication number: 20010005497
    Abstract: The present invention provides a process for treating sodium aluminosilicate which includes adding a calcium compound to sodium aluminosilicate; thermally treating the mixture of the sodium aluminosilicate and the calcium compound; and eluting the thermally-treated product with water or an aqueous solution to thereby solubilize a sodium component of the sodium aluminosilicate, recover sodium, and obtain a useful product containing sodium in very small amounts. The elution percentage of sodium can be increased by optimizing heating and elution conditions.
    Type: Application
    Filed: December 28, 2000
    Publication date: June 28, 2001
    Inventors: Yasuo Kawai, Isao Ishikawa, Yoshiyuki Takenaka, Hideya Saito, Mineo Nozaki
  • Patent number: 6001039
    Abstract: A working oil receiving chamber 8 is provided with an expanding and contracting member 12. The expanding and contracting member 12 is comprised of an expansible and contractible bellows 2a made of metal, and a bottom portion 12b made of metal and for closing opposite open ends of the bellows portion 12a, so that the member 12 can expand as the pressure of the working oil in the working oil receiving chamber 8 is increased and can contract as the pressure is decreased. A slightly compressed gas is filled in the expanding and contracting member 12.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: December 14, 1999
    Assignee: Zexel Corporation
    Inventors: Takashi Ohkubo, Isao Ishikawa, Shinichiro Nakajima
  • Patent number: 5994421
    Abstract: A water-absorbent resin dispersion comprising a water-absorbent resin (B) or a hydrous gel thereof dispersed in a liquid or heat-meltable organic active-hydrogen compound (A), wherein said resin (B) is formed by the polymerization of a water-soluble monomer or its precursor and a cross-linker and/or a polysaccharide in the compound (A); and a process for producing a polyurethane resin by the reaction of the dispersion with an organic polyisocyanate compound. As the polyurethane resin is excellent in the capacity and rate of absorption, it is useful as absorbent articles such as paper diaper and sanitary goods, humidity modifiers, cutoff material, and so forth.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: November 30, 1999
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Kazuya Otani, Masahiro Matsuoka, Kohei Maeda, Kozaburo Nagata, Takao Ando, Toru Nakanishi, Isao Ishikawa, Takayuki Tsuji