Patents by Inventor Maya Yoshida

Maya Yoshida 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).

  • Calcium carbonate with controlled particle morphology, method for producing the same, and crystal growth method
    Patent number: 12103859
    Abstract: Provided is a calcium carbonate that comprises crystals having a particular shape and structure and has a nano-order average particle size. Provided are a method for producing a calcium carbonate that comprises crystals having a particular shape and structure and has an average particle size in a particular range and a crystal growth method. The calcium carbonate has the calcite structure, has a BET specific surface area of 2 to 50 m2/g, has a number-based average particle size of 30 nm to 1.0 ?m as determined by electron microscopy, and partially comprises substantially ring-like particles.
    Type: Grant
    Filed: September 20, 2023
    Date of Patent: October 1, 2024
    Assignee: SHIRAISHI CENTRAL LABORATORIES CO. LTD.
    Inventors: Yuki Kezuka, Maya Yoshida
  • Calcium carbonate with controlled particle morphology, method for producing the same, and crystal growth method
    Patent number: 11999627
    Abstract: Provided is a calcium carbonate that comprises crystals having a particular shape and structure and has a nano-order average particle size. Provided are a method for producing a calcium carbonate that comprises crystals having a particular shape and structure and has an average particle size in a particular range and a crystal growth method. The calcium carbonate has the calcite structure, has a BET specific surface area of 2 to 50 m2/g, has a number-based average particle size of 30 nm to 1.0 ?m as determined by electron microscopy, and partially comprises substantially ring-like particles.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: June 4, 2024
    Assignee: SHIRAISHI CENTRAL LABORATORIES CO., LTD.
    Inventors: Yuki Kezuka, Maya Yoshida
  • CALCIUM CARBONATE WITH CONTROLLED PARTICLE MORPHOLOGY, METHOD FOR PRODUCING THE SAME, AND CRYSTAL GROWTH METHOD
    Publication number: 20240010509
    Abstract: Provided is a calcium carbonate that comprises crystals having a particular shape and structure and has a nano-order average particle size. Provided are a method for producing a calcium carbonate that comprises crystals having a particular shape and structure and has an average particle size in a particular range and a crystal growth method. The calcium carbonate has the calcite structure, has a BET specific surface area of 2 to 50 m2/g, has a number-based average particle size of 30 nm to 1.0 ?m as determined by electron microscopy, and partially comprises substantially ring-like particles.
    Type: Application
    Filed: September 20, 2023
    Publication date: January 11, 2024
    Applicant: SHIRAISHI CENTRAL LABORATORIES CO. LTD.
    Inventors: Yuki Kezuka, Maya Yoshida
  • CALCIUM CARBONATE WITH CONTROLLED PARTICLE MORPHOLOGY, METHOD FOR PRODUCING THE SAME, AND CRYSTAL GROWTH METHOD
    Publication number: 20220144659
    Abstract: Provided is a calcium carbonate that comprises crystals having a particular shape and structure and has a nano-order average particle size. Provided are a method for producing a calcium carbonate that comprises crystals having a particular shape and structure and has an average particle size in a particular range and a crystal growth method. The calcium carbonate has the calcite structure, has a BET specific surface area of 2 to 50 m2/g, has a number-based average particle size of 30 nm to 1.0 ?m as determined by electron microscopy, and partially comprises substantially ring-like particles.
    Type: Application
    Filed: October 26, 2021
    Publication date: May 12, 2022
    Applicant: SHIRAISHI CENTRAL LABORATORIES Co., Ltd.
    Inventors: Yuki Kezuka, Maya Yoshida
  • Calcium carbonate and production method therefor
    Patent number: 11167998
    Abstract: Provided are a calcium carbonate having a small particle diameter and easily dispersible in polymers and a production method therefor. A calcium carbonate has a magnesium content of 12000 to 120000 ppm, a BET specific surface area of 60 to 120 m2/g, and a crystallite size of (104) plane of 20 to 50 nm, and particles of the calcium carbonate are concatenated.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: November 9, 2021
    Assignee: SHIRAISHI KOGYO KAISHA, LTD.
    Inventors: Maya Yoshida, Kenichiro Eguchi
  • CALCIUM CARBONATE AND PRODUCTION METHOD THEREFOR
    Publication number: 20200062608
    Abstract: Provided are a calcium carbonate having a small particle diameter and easily dispersible in polymers and a production method therefor. A calcium carbonate has a magnesium content of 12000 to 120000 ppm, a BET specific surface area of 60 to 120 m2/g, and a crystallite size of (104) plane of 20 to 50 nm, and particles of the calcium carbonate are concatenated.
    Type: Application
    Filed: February 23, 2018
    Publication date: February 27, 2020
    Applicant: SHIRAISHI KOGYO KAISHA, LTD.
    Inventors: Maya Yoshida, Kenichiro Eguchi