Patents by Inventor Mitsuyoshi Itano

Mitsuyoshi Itano 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).

  • Ink composition for ink-jet recording
    Patent number: 4381946
    Abstract: The present invention relates to an ink composition for ink-jet recording. The ink is an aqueous solution comprising a water soluble acid or direct dye or mixtures thereof and a compound selected from the class of polyhydric alcohols having 1-4 carbon atoms, hexylene glycol, triethylene glycol, di-propylene glycol and 1,2,6-hexanetriol. The composition of this invention has a viscosity of from 4-20 c.p.s., a surface tension of from 40-60 dyn/cm and a specific resistance of from 5.times.10.sup.3 -1.times.10.sup.5 ohm cm.
    Type: Grant
    Filed: February 24, 1981
    Date of Patent: May 3, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masafumi Uehara, Mitsuyoshi Itano
  • Ink compositions for ink jet recoding
    Patent number: 4285727
    Abstract: An ink composition for ink jet recording is disclosed which contains a water soluble dye, polyhydric alcohol, and potassium carbonate in an aqueous medium.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: August 25, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masafumi Uehara, Mitsuyoshi Itano