Patents by Inventor Yumi Rakue

Yumi Rakue 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).

  • Electrically conductive paste and coating
    Patent number: 5209873
    Abstract: An electrically conductive paste composition comprises an electrically conductive powder, a solvent and an organic binder comprising one or more monohydric phenol adduct compound selected from the group consisting of:(a) a monohydric phenol adduct of an unsaturated fatty acid, its metal salt or an unsaturated fatty acid ester,(b) a saturated or unsaturated fatty acid ester of said phenol adduct (a),(c) a sulfonation product of said phenol adduct (a) and(d) an amination product of said phenol adduct. It is applied to a resin article to provide an electric circuit having an improved adhesion.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: May 11, 1993
    Assignee: Kao Corporation
    Inventors: Yuzo Yamamoto, Hiromoto Mizushima, Yumi Rakue
  • Conductive paste and conductive coating film
    Patent number: 5158708
    Abstract: An electrically conductive paste composition comprises an electric conductive powder, an organic binder comprising (A) a polyhydroxystyrene derivative and (B) a thermosetting resin at a weight ratio of (A) to (B) in the range between 5/95 and 95/5 and a solvent. The paste is used for an electric circuit printed on a substrate and improved in view of migration resistance, flexibility and reliability.
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: October 27, 1992
    Assignee: Kao Corporation
    Inventors: Yuzo Yamamoto, Tomoyuki Haishi, Hiromitsu Hayashi, Masaki Iwasaki, Yumi Rakue
  • Electrically conductive paste composition
    Patent number: 5156771
    Abstract: An electrically conductive paste composition comprises an electrically conductive powder, an organic binder comprising a polymer of a hydroxystyrene having the formula (A) or a copolymer of hydroxystyrene having the formula (B), said polymer and copolymer each having a weight-average molecular weight of 1,000 to 2,000,000, and a solvent. In the formula, Y and Z are an amine group and others.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: October 20, 1992
    Assignee: Kao Corporation
    Inventors: Yuzo Yamamoto, Masaki Iwasaki, Tomoyuki Haishi, Hiromitsu Hayashi, Yumi Rakue