Patents by Inventor Norihiko Matsushita

Norihiko Matsushita 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
    Patent number: 6843819
    Abstract: There is provided an air filter, which has a long lifetime and permits to capture effectively carbon particles and reduce costs. The air filter has the first filter layer 11 impregnated with oil and the second filter layer 12, which is provided on the downstream side of the first filter layer 11 and serves as a lipophobic layer having an oil-repellent property. The filter material of the first filter layer 11 has a higher density than the filter material of the second filter material 12.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: January 18, 2005
    Assignees: Toyo Roki Seizo Kabushiki Kaisha, Awa Paper Mfg. Co., Ltd.
    Inventors: Atsushi Suzuki, Toshinori Oba, Norihiko Matsushita, Katsumi Suzuki, Takeo Jo
  • Air filter
    Publication number: 20030046913
    Abstract: There is provided an air filter, which has a long lifetime and permits to capture effectively carbon particles and reduce costs. The air filter has the first filter layer 11 impregnated with oil and the second filter layer 12, which is provided on the downstream side of the first filter layer 11 and serves as a lipophobic layer having an oil-repellent property. The filter material of the first filter layer 11 has a higher density than the filter material of the second filter material 12.
    Type: Application
    Filed: January 23, 2002
    Publication date: March 13, 2003
    Inventors: Atsushi Suzuki, Toshinori Oba, Norihiko Matsushita, Katsumi Suzuki, Takeo Jo