Patents by Inventor Akihiko Saka

Akihiko Saka 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).

  • Patent number: 5891118
    Abstract: A substantially elongated absorbent article having a liquid permeable topsheet, a liquid impermeable backsheet, an absorbent member interposed between the topsheet and the backsheet, and a pair of hydrophobic areas along opposing longitudinal side portions of an upper surface of the absorbent article inwardly from longitudinal side edges of the absorbent article, the hydrophobic areas each having a continuous or discontinuous antileakage groove formed along a respective one of the longitudinal side portions, wherein a width of each of the antileakage grooves is from 0.1 mm to 20 mm, a ratio of a depth of each of the antileakage grooves with respect to a thickness of a portion of the absorbent article where no antileakage groove is formed is from 0.01 to 0.8, and the depth of each of the antileakage grooves is from 0.1 mm to 12 mm.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: April 6, 1999
    Assignee: Kao Corporation
    Inventors: Yasuo Toyoshima, Tetsuya Kusagawa, Mitsugu Hamajima, Minoru Nakanishi, Yuji Yana, Akihiko Saka