Patents by Inventor Machiko Yokoyama

Machiko Yokoyama 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).

  • Base material for wiping sheet
    Patent number: 7094462
    Abstract: A base material for a wiping sheet on which powder is to be supported, wherein the ratio of the average pore diameter (D) of the surface of the base material while dry as measured by the mercury penetration method to the average particle diameter (d) of the powder, D/d, ranges from 0.03 to 30, and the base material while dry has a bulk softness of from 0.1 to 5 N/30 mm and a thickness of from 0.3 to 5 mm.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: August 22, 2006
    Assignee: Kao Corporation
    Inventors: Machiko Yokoyama, Manabu Kaneda, Takashi Kawai, Yasuhiro Komori, Shoichi Taneichi, Katsuhiko Takeuchi
  • Sheet pack
    Patent number: 6503232
    Abstract: A sheet pack includes a moisture-permeable support and a film-forming cosmetic material at least partially supported by the moisture-permeable support. The moisture-permeable support has a yield point in its elongation-stress curve, the stress fi at the yield point is at least about 2 N/50 mm, and the elongation at yield point Si (%) divided by the elongation at break Sb (%) is no more than about 0.8.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: January 7, 2003
    Assignee: Kao Corporation
    Inventors: Takashi Kawai, Machiko Yokoyama, Manabu Kaneda, Tomohiro Fukita