Patents by Inventor Aiko Ishikawa

Aiko Ishikawa 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).

  • Publication number: 20030099894
    Abstract: A recording liquid including a colorant and a carrier liquid including at least one of a liquid paraffin and a linear silicone oil. The recording liquid is an inkjet ink, a printing ink, a marker ink, a stencil ink, an electronic recording ink, a non-aqueous paint, a liquid developer or the like. When the recording liquid is a non-aqueous paint or a liquid developer, the recording ink further includes a resin.
    Type: Application
    Filed: May 30, 2002
    Publication date: May 29, 2003
    Inventors: Kazuo Tsubuko, Tsuyoshi Asami, Aiko Ishikawa
  • Publication number: 20030065064
    Abstract: A liquid recording material containing at least a carrier liquid, a resin, a coloring agent, and a reactive silicone material, an image transfer sheet for use with the liquid recording material, and a method of fixing images, using the liquid recording material, are disclosed.
    Type: Application
    Filed: June 12, 2002
    Publication date: April 3, 2003
    Inventors: Kazuo Tsubuko, Tsuyoshi Asami, Aiko Ishikawa
  • Patent number: 6447973
    Abstract: A liquid developer containing a carrier liquid containing silicone oil, and toner particles dispersed in the carrier liquid and each containing a coloring agent and a resin, the resin contains at least one member selected from the group consisting of the following resins (a)-(g): (a): rosin polymers having a softening point of 50-190° C., a glass transition point of 10-170° C. and a molecular weight of 2,000-40,000 and obtained by reacting (a1) a rosin glycidyl ester, (a2) dicarboxylic acid or dicarboxylic anhydride, (a3) at least one crosslinking agent selected from the group consisting of polyfunctional epoxy compounds, tri- or more polybasic acids or anhydrides thereof tri- or more polyhydric alcohols, and (a4) a dihydric alcohol; (b): vinyl polymers having a ratio of the weight average molecular weight to the number average molecular weight of greater than 4; (c): olefin resins having a melt index of 2.5-700; (d): polyolefins or polyolefin copolymers having an acid value of 0.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: September 10, 2002
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuyoshi Asami, Kazuo Tsubuko, Aiko Ishikawa, Akihiro Koseki, Takeo Kudoh, Kazuhiko Umemura
  • Publication number: 20020081515
    Abstract: A liquid recording material containing at least a carrier liquid, a resin, a coloring agent, and a reactive silicone material, an image transfer sheet for use with the liquid recording material, and a method of fixing images, using the liquid recording material, are disclosed.
    Type: Application
    Filed: August 30, 2001
    Publication date: June 27, 2002
    Inventors: Kazuo Tsubuko, Tsuyoshi Asami, Aiko Ishikawa