Patents by Inventor Ikuko Kawakami

Ikuko Kawakami 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).

  • Hot-melt ink composition
    Patent number: 5230731
    Abstract: A hot-melt ink composition for an ink jet printer, comprising a coloring agent, and a vehicle which comprises a dialkylbenzenesulfonamide, a monoalkylbenzenesulfonamide, and a resin; and a hot-melt ink composition comprising from 10 to 30 wt. % of a coloring agent, and a vehicle. These ink compositions can produce high quality images which have improved resistance to abrasion and are free from blooming.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: July 27, 1993
    Assignee: Seiko Epson Corporation
    Inventors: Kenichi Kanbayashi, Makoto Matsuzaki, Fumiyuki Kanai, Fumie Uehara, Ikuko Kawakami