Patents by Inventor Yoichi Fujumura

Yoichi Fujumura 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).

  • Chemical filter unit and gas purification system
    Patent number: 6352579
    Abstract: A chemical filter unit, which comprises a filter medium formed by laminating a plurality of fiber sheets an a housing the filter medium, and has a gas inlet open on one face of the housing and a gas outlet open on the other face substantially in opposite to the gas inlet, characterized in that gas passages to allow the flow of the gas along the surfaces of the fiber sheets are formed between the respectively adjacent fiber sheets of the filter medium from the gas outlet to the gas outlet, and that the adsorption capacity of the filter medium is 300 eq/m3 or more. It is preferable that the fibers constituting the fiber sheets are ion exchange fibers.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: March 5, 2002
    Assignee: Toray Industries, Inc.
    Inventors: Nami Hirata, Yoichi Fujumura, Hideo Saruyama, Masaki Amano