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Hideki Yokoyama

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Patents Grantslast 30 patents

  • Information Patent Grant

    Water-absorbent resin particle
    • Patent number 11,420,184
    • Issue date Aug 23, 2022
    • Sumitomo Seika Chemicals Co., Ltd.
    • Hiroki Yabuguchi
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Water-absorbent resin particle
    • Patent number 11,338,267
    • Issue date May 24, 2022
    • Sumitomo Seika Chemicals Co., Ltd.
    • Hiroki Yabuguchi
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Water-absorbent resin particles
    • Patent number 11,241,669
    • Issue date Feb 8, 2022
    • Sumitomo Seika Chemicals Co., Ltd.
    • Hiroki Yabuguchi
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Water-absorbent resin and method of producing water-absorbent resin
    • Patent number 11,136,420
    • Issue date Oct 5, 2021
    • Sumitomo Seika Chemicals Co. Ltd.
    • Tetsuhiro Hinayama
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Water-absorbent resin and absorbent article
    • Patent number 10,525,443
    • Issue date Jan 7, 2020
    • Sumitomo Seika Chemicals Co. Ltd.
    • Masahiro Murakami
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Water-absorbent resin and absorbent article
    • Patent number 10,323,105
    • Issue date Jun 18, 2019
    • Sumitomo Seika Chemicals Co. Ltd.
    • Hiroki Yabuguchi
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Water-absorbent resin and absorbent article
    • Patent number 9,982,069
    • Issue date May 29, 2018
    • Sumitomo Seika Chemicals Co. Ltd.
    • Tetsuhiro Hinayama
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Water-absorbent resin and absorbent article
    • Patent number 9,925,294
    • Issue date Mar 27, 2018
    • Sumitomo Seika Chemicals Co. Ltd.
    • Tetsuhiro Hinayama
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Method of manufacturing water-absorbent resin, water-absorbent resi...
    • Patent number 9,873,755
    • Issue date Jan 23, 2018
    • Sumitomo Seika Chemicals Co. Ltd.
    • Masahiro Murakami
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Method for producing a water-absorbent resin
    • Patent number 9,132,413
    • Issue date Sep 15, 2015
    • Sumitomo Seika Chemicals Co., Ltd.
    • Sachi Kikuno
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Method for producing a water-absorbent resin
    • Patent number 9,102,771
    • Issue date Aug 11, 2015
    • Sumitomo Seika Chemicals Co., Ltd.
    • Hideki Yokoyama
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for production of water-absorbent resin
    • Patent number 9,074,022
    • Issue date Jul 7, 2015
    • Sumitomo Seika Chemicals Co., Ltd.
    • Hideki Yokoyama
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Method for producing a water-absorbent resin
    • Patent number 8,883,944
    • Issue date Nov 11, 2014
    • Sumitomo Seika Chemicals Co., Ltd.
    • Atsushi Heguri
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Method for producing a water-absorbent resin
    • Patent number 8,859,700
    • Issue date Oct 14, 2014
    • Sumitomo Seika Chemicals Co., Ltd.
    • Hideki Yokoyama
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Method for producing a water-absorbent resin
    • Patent number 8,841,395
    • Issue date Sep 23, 2014
    • Sumitomo Seika Chemicals Co., Ltd.
    • Hideki Yokoyama
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents