Patents by Inventor Akira KUGA

Akira KUGA 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).

  • Filter device, column, and liquid chromatography device
    Patent number: 11819786
    Abstract: A filter device includes a first filter, a first retaining member that has a hollow shape, the first filter being fitted inside the first retaining member, a second filter that has a smaller pore size than the first filter, a second retaining member that is disposed downstream of the first filter and that has a hollow shape, the second filter being fitted inside the second retaining member, and a spacer that has a hollow shape, that is disposed between the first retaining member and the second retaining member, that maintains a non-contact state between the first filter and the second filter, and that includes a first contact portion contacting the first filter.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: November 21, 2023
    Assignee: ARKRAY, Inc.
    Inventors: Yusuke Nakayama, Takeshi Takagi, Akira Kuga
  • FILTER DEVICE, COLUMN, AND LIQUID CHROMATOGRAPHY DEVICE
    Publication number: 20210178296
    Abstract: A filter device includes a first filter, a first retaining member that has a hollow shape, the first filter being fitted inside the first retaining member, a second filter that has a smaller pore size than the first filter, a second retaining member that is disposed downstream of the first filter and that has a hollow shape, the second filter being fitted inside the second retaining member, and a spacer that has a hollow shape, that is disposed between the first retaining member and the second retaining member, that maintains a non-contact state between the first filter and the second filter, and that includes a first contact portion contacting the first filter.
    Type: Application
    Filed: December 16, 2020
    Publication date: June 17, 2021
    Applicant: ARKRAY, Inc.
    Inventors: Yusuke NAKAYAMA, Takeshi TAKAGI, Akira KUGA