Patents by Inventor Hiroyuki Fushimi

Hiroyuki Fushimi 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).

  • Magenta color toner for developing latent electrostatic images in color electrophotography
    Patent number: 4933250
    Abstract: A magenta toner is disclosed, which comprises a coloring composition comprising a thioindigo pigment, and a xanthene dye having general formula (I) or a laked xanthene dye thereof, and a binder resin: ##STR1## wherein R.sup.1, R.sup.2, R.sup.5, R.sup.6, and R.sup.7 each represent hydrogen or a lower alkyl group; R.sup.3 and R.sup.4 each represent a lower alkyl group; and A.sup.- represents halogen.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: June 12, 1990
    Assignee: Ricoh Company Ltd.
    Inventors: Nobuhiro Nakayama, Yasuo Asahina, Mitsuo Aoki, Hiroyuki Fushimi, Kayo Makita
  • Triboelectric charge application member for toner
    Patent number: 4841331
    Abstract: A triboelectric charge application member for imparting or applying electrostatic charge to a toner through the triboelectric charging thereof for developing electrostatic images with the charged toner to visible toner images. The triboelectric charge application member includes an overcoat layer comprising as the main component a polymer which comprises a fluoro-olefin compound and an unsaturated silicon compound as the monomer units of the polymer. The triboelectric charge application member may be carrier particles having the above overcoat layer and a toner transportation member having the overcoat layer, depending upon its application.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: June 20, 1989
    Assignee: Ricoh Company, Ltd.
    Inventors: Nobuhiro Nakayama, Yasuo Asahina, Hiroyuki Fushimi, Yasuaki Iwamoto
  • Toner for developing electrostatic latent image
    Patent number: 4762763
    Abstract: This invention relates to a toner for developing an electrostatic latent image, which contains a coloring agent, a binder resin and a charge controlling agent as the main components, said charge controlling agent being a metal salt of salicylic acid or derivatives.
    Type: Grant
    Filed: December 8, 1986
    Date of Patent: August 9, 1988
    Assignee: Ricoh Co., Ltd.
    Inventors: Yoshihiro Nomura, Noriaki Ide, Kazumi Ohtaki, Masami Tomita, Hachiro Tosaka, Toshiki Nanya, Motoi Orihara, Shunichi Chiba, Satoru Inoue, Yasuo Asahina, Hiroyuki Fushimi