Patents by Inventor Takashi Kiriu

Takashi Kiriu 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).

  • Toner for developing electrostatic latent images
    Patent number: 4996339
    Abstract: A compound for developing electrostatic latent images for use in a toner wherein the compound comprises an aluminum compound of aromatic o-aminocarboxylic acid, the aromatic o-aminocarboxylic acid being represented by the formula ##STR1## wherein Q is benzene nucleus which is optionally substituted with at least one nuclear substituent or naphthalene nucleus which is optionally substituted with at least one nuclear substituent, R is hydrogen, alkyl (C.sub.1 -C.sub.18), aryl(C.sub.1 -C.sub.18), aralkyl(C.sub.1 -C.sub.18), or --COR', wherein R' is alkyl(C.sub.1 -C.sub.8), aryl(C.sub.1 -C.sub.8), alkoxy (C.sub.1 -C.sub.8) or amino.
    Type: Grant
    Filed: June 6, 1989
    Date of Patent: February 26, 1991
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Akihiro Tada, Takashi Kiriu, Motoomi Arakawa
  • Compounds usable in a toner for developing electrostatic latent images
    Patent number: 4931588
    Abstract: A salt forming compound represented by the formula ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.8 alkyl or benzyl, R.sub.2 and R.sub.3 are each C.sub.1 -C.sub.18 alkyl, R.sub.4 is C.sub.1 -C.sub.18 alkyl or benzyl, X is hydroxyl or amino, and Y is hydroxyl or hydrogen and is not hydrogen when X is hydroxyl, usable in a toner for developing electrostatic latent images, e.g. comprising 0.5 to 5 parts by weight of the salt forming compound and 100 parts by weight of a resin.
    Type: Grant
    Filed: September 15, 1989
    Date of Patent: June 5, 1990
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Yoji Kawagishi, Shinichi Narita, Takashi Kiriu, Schunichiro Yamanaka
  • Toner for developing electrostatic latent images
    Patent number: 4855208
    Abstract: A toner for developing electrostatic latent images which is characterized in that the toner comprises an aluminum compound of aromatic o-aminocarboxylic acid, the aromatic o-aminocarboxylic acid being represented by the formula ##STR1## wherein Q is benzene nucleus which is optionally substituted with at least one nuclear substituent or naphthalene nucleus which is optionally substituted with at least one nuclear substituent, R is hydrogen, alkyl (C.sub.1 -C.sub.18), aryl or nuclear substituted aryl (C.sub.6 -C.sub.18), aralkyl or nuclear substituted aralkyl (C.sub.7 -C.sub.18), or --COR', wherein R' is alkyl(C.sub.1 -C.sub.8), aryl(C.sub.6 -C.sub.8), alkoxy (C.sub.1 -C.sub.8) or amino.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: August 8, 1989
    Assignee: Orient Chemical Industries Ltd.
    Inventors: Akihiro Tada, Takashi Kiriu, Motoomi Arakawa
  • Toner for developing electrostatic latent images and complex compounds containing aluminum usable therein
    Patent number: 4845003
    Abstract: A toner for developing electrostatic latent images characterized in that the toner comprises an aluminum compound of a hydroxycarboxylic acid which may be substituted with alkyl and/or aralkyl.
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: July 4, 1989
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Takashi Kiriu, Motoomi Arakawa
  • Toner for developing electrostatic latent images
    Patent number: 4826749
    Abstract: A toner for developing electrostatic latent images comprising 0.5 to 5 parts by weight of a salt forming compound represented by the formula ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.8 alkyl or benzyl, R.sub.2 and R.sub.3 each C.sub.1 -C.sub.18 alkyl, R.sub.4 is C.sub.1 -C.sub.18 alkyl or benzyl, X is hydroxyl or amino, and Y is hydroxyl or hydrogen and is not hydrogen when X is hydroxyl, and 100 parts by weight of a resin.
    Type: Grant
    Filed: April 17, 1986
    Date of Patent: May 2, 1989
    Assignee: Orient Chemical Industries Ltd.
    Inventors: Yoji Kawagishi, Shinichi Narita, Takashi Kiriu, Schunichiro Yamanaka
  • Toner for developing electrostatic latent images
    Patent number: 4656112
    Abstract: A toner for developing electrostatic latent images which is characterized in that the toner comprises as a charge control agent a zinc complex compound of an aromatic hydroxycarboxylic acid having or not having a substitutent.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: April 7, 1987
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Yoji Kawagishi, Shinichi Narita, Takashi Kiriu, Kenji Uomoto