Patents by Inventor Chizuko FURO

Chizuko FURO 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).

  • Patent number: 11395800
    Abstract: An object of the present invention is to provide a pharmaceutical tablet having high tensile strength and excellent in immediate disintegrability. The pharmaceutical tablet of the present invention is obtained by a direct compression method, and contains an active ingredient, a polyvinyl alcohol resin, and a plasticizer other than water, wherein a content of the plasticizer is 1 to 8 parts by weight with respect to 100 parts by weight of the polyvinyl alcohol resin.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: July 26, 2022
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Chizuko Furo, Ayaka Kobayashi, Hirofumi Takeuchi, Yoshiko Takeuchi
  • Patent number: 11384274
    Abstract: The diverting agent of the present invention contains resin particles of polyvinyl alcohol-based resin. The resin particles of polyvinyl alcohol-based resin are a particle mixture containing two or more types of resin particles having different particle diameters, and the diverting agent contains resin particles A of polyvinyl alcohol-based resin having a particle diameter of 1,700 ?m or more in a range of 5 mass % to 95 mass % and resin particles B of polyvinyl alcohol-based resin having a particle diameter of 250 ?m to 1,000 ?m in a range of 5 mass % to 95 mass %.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: July 12, 2022
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tomoya Fujita, Takahiro Saka, Chizuko Furo
  • Publication number: 20220119697
    Abstract: An object of the present invention is to provide a diverting agent which has performance to release filling due to biodegradability, can be quickly removed after a certain period of time, and has an excellent filling property with respect to a fracture in a well. The diverting agent according to the present invention contains particles having a particle diameter of 1,700 ?m or more in an amount of 10 to 70 mass %, particles having a particle diameter of 500 ?m or more and less than 1,700 ?m in an amount of 20 to 80 mass %, and particles having a particle diameter of less than 250 ?m in an amount of 5 to 40 mass %, and the diverting agent contains a biodegradable resin in an amount of 10 mass % or more.
    Type: Application
    Filed: December 28, 2021
    Publication date: April 21, 2022
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Chizuko FURO, Yuya KANAMORI, Yasuhiro HIRANO
  • Publication number: 20210363411
    Abstract: A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30° C.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Shusaku MANDAI, Yasuhiro HIRANO, Ryosuke TANIGUCHI, Chizuko FURO, Kenji FURUI, Kenji SHINOHARA, Ken SATO
  • Publication number: 20210363412
    Abstract: An object of the present invention is to provide a diverting agent which does not completely dissolve in water and seawater in an ultra-low temperature to low temperature range (5° C. to 30° C.) for a certain period of time (about 5 minutes to 3 hours), and is quickly dissolved and removed after a certain period of time in an excavation method using a hydraulic fracturing method. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin having 2.3 mol % to 15 mol % of a hydrophilic modifying group in a molecular structure thereof.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yasuhiro HIRANO, Ryosuke TANIGUCHI, Chizuko FURO
  • Publication number: 20210363413
    Abstract: An object of the invention is to provide a diverting agent which has solubility in water that can be controlled excellently and which does not easily dissolve at an early stage of filling of fractures in a well in excavation method using a hydraulic fracturing method and dissolves in water and can be easily removed after filling is no longer needed. The diverting agent of the invention contains powdery polyvinyl alcohol-based resins having an average particle diameter of 800 to 2000 ?m.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yasuhiro HIRANO, Ryosuke TANIGUCHI, Chizuko FURO
  • Publication number: 20210309911
    Abstract: An object of the present invention is to provide a diverting agent that exhibits sufficient filling properties against a fracture in a well because of swelling without completely dissolution for a certain period of time (about 30 minutes to 5 hours), and that quickly dissolves and be removed even at a low temperature of 40° C. to 60° C. after a certain period of time has passed. The present invention relates to a diverting agent containing a modified polyvinyl alcohol-based resin.
    Type: Application
    Filed: June 22, 2021
    Publication date: October 7, 2021
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yasuhiro HIRANO, Takahiro SAKA, Ryosuke TANIGUCHI, Chizuko FURO
  • Publication number: 20210309909
    Abstract: An object of the present invention is to provide a diverting agent that does not completely dissolve for a certain period of time (about 5 minutes to 3 hours) and has high cohesiveness between particles. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin having a degree of saponification of 65 mol % to 95 mol %.
    Type: Application
    Filed: June 21, 2021
    Publication date: October 7, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yasuhiro HIRANO, Takahiro SAKA, Ryosuke TANIGUCHI, Chizuko FURO
  • Publication number: 20210309910
    Abstract: An object of the present invention is to provide a diverting agent that can exhibit sufficient filling properties against a fracture in a well in an excavation method using a hydraulic fracturing method, and that is excellent in solubility after a predetermined period of time has passed. The diverting agent of the present invention contains a polyvinyl alcohol-based resin having an average polymerization degree of 1000 or more.
    Type: Application
    Filed: June 21, 2021
    Publication date: October 7, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yasuhiro HIRANO, Takahiro SAKA, Ryosuke TANIGUCHI, Chizuko FURO
  • Publication number: 20200317985
    Abstract: The diverting agent of the present invention contains resin particles of polyvinyl alcohol-based resin. The resin particles of polyvinyl alcohol-based resin are a particle mixture containing two or more types of resin particles having different particle diameters, and the diverting agent contains resin particles A of polyvinyl alcohol-based resin having a particle diameter of 1,700 ?m or more in a range of 5 mass % to 95 mass % and resin particles B of polyvinyl alcohol-based resin having a particle diameter of 250 ?m to 1,000 ?m in a range of 5 mass % to 95 mass %.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 8, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tomoya FUJITA, Takahiro SAKA, Chizuko FURO
  • Publication number: 20200170955
    Abstract: An object of the present invention is to provide a pharmaceutical tablet having high tensile strength and excellent in immediate disintegrability. The pharmaceutical tablet of the present invention is obtained by a direct compression method, and contains an active ingredient, a polyvinyl alcohol resin, and a plasticizer other than water, wherein a content of the plasticizer is 1 to 8 parts by weight with respect to 100 parts by weight of the polyvinyl alcohol resin.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Chizuko FURO, Ayaka KOBAYASHI, Hirofumi TAKEUCHI, Yoshiko TAKEUCHI
  • Publication number: 20200172796
    Abstract: A problem to be solved of the present invention is to provide a diverting agent which gradually dissolves in water. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin and a method of filling a fracture using the diverting agent.
    Type: Application
    Filed: February 5, 2020
    Publication date: June 4, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Kazutoshi TSUJI, Norihito SAKAI, Tomoya FUJITA, Takahiro SAKA, Chizuko FURO
  • Patent number: 10595528
    Abstract: Provided is a liquid spray agent for agricultural use, including a polyvinyl alcohol-based resin having a saponification degree of from 30 mol %, to 60 mol %. With this, a liquid spray agent for agricultural use, which is used in agricultural and horticultural fields and has high fixation ability and excellent sprayability, can be provided.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: March 24, 2020
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Chizuko Furo, Shusaku Mandai
  • Patent number: 10550038
    Abstract: A cement admixture includes a crosslinked product of a modified polyvinyl alcohol-based resin, wherein the dissolution rate of 1 g of the crosslinked product of a modified polyvinyl alcohol-based resin for 1 liter of water at 70° C. is 50% or less.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: February 4, 2020
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takahiro Saka, Chizuko Furo, Shusaku Mandai
  • Publication number: 20190216081
    Abstract: A liquid spray agent for plants includes: a polyvinyl alcohol resin (A) having a saponification degree of from 30 mol % to 60 mol %; and an anionic surfactant (B). The liquid spray agent for plants has enhanced spreading property and stability as a spray agent.
    Type: Application
    Filed: March 25, 2019
    Publication date: July 18, 2019
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Satoshi IKUBO, Chizuko FURO, Shusaku MANDAI
  • Publication number: 20180362404
    Abstract: Conventional methods suffer from unsatisfactory performance of the dehydration-preventing agent at a high temperature, and the present invention provides a cement admixture exhibiting an excellent dehydration-preventing effect at a high temperature. The cement admixture of the present invention includes a crosslinked product of a modified polyvinyl alcohol-based resin, wherein the dissolution rate of 1 g of the crosslinked product of a modified polyvinyl alcohol-based resin for 1 liter of water at 70° C. is 50% or less.
    Type: Application
    Filed: December 6, 2016
    Publication date: December 20, 2018
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takahiro SAKA, Chizuko FURO, Shusaku MANDAI
  • Patent number: 10111421
    Abstract: Disclosed is a dispersing agent for agrochemicals, said dispersing agent which comprises a modified polyvinyl alcohol-based resin containing a structural unit having a nonionic hydrophilicity group in side chain, and having a saponification degree of 95 mol % or more. The dispersing agent for agrochemicals can provide a dispersion in which a hardly water-soluble agrochemical active ingredient employed for a dispersoid is dispersed in a stable state even in the case where the dispersoid has a relatively large particle size.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: October 30, 2018
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takahiro Saka, Chizuko Furo, Shusaku Mandai
  • Patent number: 10028915
    Abstract: Provided herein is a polyvinyl alcohol fine particle suitable for a pharmaceutical binder for obtaining a pharmaceutical tablet of properties including good sustained release, high hardness, and excellent friability. The polyvinyl alcohol fine particle of the present invention contains 25 mol % or more of a gauche structure in polyvinyl alcohol molecules within a 0.8-nm region inside the particle from the particle surface.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: July 24, 2018
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Chizuko Furo, Taiji Kanda, Koji Hara, Pradeep Ratilal Vavia, Jasmin Dhirajlal Monpara, Pankaj Hanumantrao Jadhav
  • Patent number: 9809697
    Abstract: An object of the invention is to provide a crosslinking agent with which a crosslinked polymer that suffers little coloring with the lapse of time and shows excellent viscosity stability is obtained. The crosslinking agent of the invention includes a compound which contains two or more alkylhydrazide groups represented by the following general formula (1). (In formula (1), R1 represents an alkyl group having 1-10 carbon atoms, and symbol * is a linking bond.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: November 7, 2017
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Chizuko Furo, Taiji Kanda, Shusaku Mandai, Takeshi Kuroda
  • Publication number: 20170209377
    Abstract: Provided herein is a polyvinyl alcohol fine particle suitable for a pharmaceutical binder for obtaining a pharmaceutical tablet of properties including good sustained release, high hardness, and excellent friability. The polyvinyl alcohol tine particle of the present invention contains 25 mol % or more of a gauche structure in polyvinyl alcohol molecules within a 0.8-nm region inside the particle from the particle surface.
    Type: Application
    Filed: July 24, 2015
    Publication date: July 27, 2017
    Applicant: The Nippon Synthetic Chemical Industry Co., Ltd.
    Inventors: Chizuko FURO, Taiji KANDA, Koji HARA, Pradeep Ratilal VAVIA, Jasmin Dhirajlal MONPARA, Pankaj Hanumantrao JADHAV