Patents by Inventor Takashi NIKI

Takashi NIKI 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).

  • Air filter medium, air filter pack, and air filter unit
    Patent number: 11427690
    Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A proportion of areas occupied by the plurality of nodes on a surface of the first porous PTFE membrane is in the range of 1.5 to 3.0% and an average of the areas of the plurality of nodes is 200 ?m2 or more.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: August 30, 2022
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takashi Niki, Masaaki Mori, Shiho Wada, Atsushi Daimon, Toshiki Yanagi
  • Air filter medium, air filter pack, and air filter unit
    Patent number: 11406927
    Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A contact angle of the first porous PTFE membrane with water is in the range of 154° to 165°.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: August 9, 2022
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takashi Niki, Masaaki Mori, Shiho Wada, Atsushi Daimon, Toshiki Yanagi
  • Air filter medium, air filter pack, and air filter unit
    Patent number: 11213782
    Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium (10) has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A thickness of the first porous PTFE membrane is in the range of 4 to 40 ?m and a specific surface area of the first porous PTFE membrane is 0.5 m2/g or less.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: January 4, 2022
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takashi Niki, Masaaki Mori, Shiho Wada, Atsushi Daimon, Toshiki Yanagi
  • Air filter medium, air filter pack, and air filter unit
    Patent number: 10765987
    Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. An average fiber diameter of fibers included in the first porous PTFE membrane is 0.24 to 0.45 ?m, an average fiber diameter of fibers included in the second porous PTFE membrane is 0.04 to 0.23 ?m, the air filter medium has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: September 8, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takashi Niki, Masaaki Mori, Shiho Wada, Atsushi Daimon
  • AIR FILTER MEDIUM, AIR FILTER PACK, AND AIR FILTER UNIT
    Publication number: 20200002495
    Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A proportion of areas occupied by the plurality of nodes on a surface of the first porous PTFE membrane is in the range of 1.5 to 3.0% and an average of the areas of the plurality of nodes is 200 ?m2 or more.
    Type: Application
    Filed: September 25, 2017
    Publication date: January 2, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takashi NIKI, Masaaki MORI, Shiho WADA, Atsushi DAIMON, Toshiki YANAGI
  • AIR FILTER MEDIUM, AIR FILTER PACK, AND AIR FILTER UNIT
    Publication number: 20190232211
    Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A contact angle of the first porous PTFE membrane with water is in the range of 154° to 165°.
    Type: Application
    Filed: September 25, 2017
    Publication date: August 1, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takashi NIKI, Masaaki MORI, Shiho WADA, Atsushi DAIMON, Toshiki YANAGI
  • AIR FILTER MEDIUM, AIR FILTER PACK, AND AIR FILTER UNIT
    Publication number: 20190224609
    Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium (10) has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A thickness of the first porous PTFE membrane is in the range of 4 to 40 ?m and a specific surface area of the first porous PTFE membrane is 0.5 m2/g or less.
    Type: Application
    Filed: September 25, 2017
    Publication date: July 25, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takashi NIKI, Masaaki MORI, Shiho WADA, Atsushi DAIMON, Toshiki YANAGI
  • AIR FILTER MEDIUM, AIR FILTER PACK, AND AIR FILTER UNIT
    Publication number: 20180264392
    Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. An average fiber diameter of fibers included in the first porous PTFE membrane is 0.24 to 0.45 ?m, an average fiber diameter of fibers included in the second porous PTFE membrane is 0.04 to 0.23 ?m, the air filter medium has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane.
    Type: Application
    Filed: September 30, 2016
    Publication date: September 20, 2018
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takashi NIKI, Masaaki MORI, Shiho WADA, Atsushi DAIMON