Patents by Inventor Tetsui Akase

Tetsui Akase 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).

  • Alcohol-soluble dye and ink composition containing the same
    Patent number: 5366543
    Abstract: The present invention provides a disazo salt-forming dye having excellent solubility with organic solvents, especially alcohols and glycols.The present invention thus provides a disazo salt-forming dye represented by the Formula (I): ##STR1## or the Formula (II): ##STR2## wherein Ka.sup.+ represents a cation of an amine which is substituted with at least one linear or cyclic alkyl group or aralkyl group having 6-12 carbon atoms which may be branched or interrupted by oxygen.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: November 22, 1994
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Takashi Ono, Tatsuya Yagyu, Tetsui Akase
  • Liquid azo dye and ink composition containing the same
    Patent number: 5326866
    Abstract: A liquid azo dye represented by the formula: ##STR1## (wherein, A stands for a phenylene group which may have a substituent, n is o or 1, Cp is a pyrazolone derivative residue or a naphthol derivative residue, X is --NH-- or --COO-- and R is an alkyl group having 3 to 12 carbon atoms).
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: July 5, 1994
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Takashi Ono, Tatsuya Yagyu, Tetsui Akase
  • Salt-forming type dye and ink composition
    Patent number: 5281264
    Abstract: The present invention provides a salt forming-type dye represented by the formula: ##STR1## wherein Ka.sup.+ is a C.sub.6-20 amine cation or a basic dye cation, and n is an integer of 1 to 4, which indicates the number of Ka.sup.+. The salt-forming dye can be used in an ink composition.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: January 25, 1994
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Takashi Ono, Tatsuya Yagyu, Tetsui Akase