Patents by Inventor Takeshi Matsubayashi

Takeshi Matsubayashi 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: 20240079723
    Abstract: A polyolefin microporous membrane having a film thickness of 1 ?m to 30 ?m; an air permeability of 500 sec/100 cm3 or less; and a withstand voltage reduction rate of 1.0% or greater and 17.0% or less due to pressing under conditions of a temperature of 60° C., a pressure of 3.4 MPa, and a compression time of 1 sec or a withstand voltage reduction rate of 1.0% or greater and 28.0% or less due to pressing under conditions of a temperature of 70° C., a pressure of 8 MPa, and a compression time of 3 min, or having a polyethylene crystal long period before compression of 35.0 nm or more, measured by a small-angle X-ray scattering (SAXS) method, and a diffraction peak-to-peak distance of 2.410° or more and 2.600° or less derived from a (110) plane and a (200) plane of a polyethylene crystal before compression is provided.
    Type: Application
    Filed: April 26, 2023
    Publication date: March 7, 2024
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Wataru Mizutani, Tomosato Okubo, Masaaki Okada, Takeshi Matsubayashi
  • Publication number: 20240055722
    Abstract: A polyolefin porous film is provided which has a film thickness of 1-30 ?m and an air permeability of at most 500 sec/100 cm3, and which has a 30% or higher porosity after compression, measured in a compression test under the conditions in which the temperature is 70° C., the pressure is 8 MPa and the compression time is 3 minutes.
    Type: Application
    Filed: October 29, 2021
    Publication date: February 15, 2024
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Wataru Mizutani, Tomosato Okubo, Masaaki Okada, Takeshi Matsubayashi