Patents by Inventor Megumi Saito

Megumi Saito 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, and recording process using the same
    Patent number: 5110356
    Abstract: The present invention provides an ink comprising a dye and a liquid medium, wherein said dye is a dye of Formula (I): ##STR1## wherein R.sub.1 and R.sub.2 represent independently an alkyl group, an alkoxy group or an acetylamino group; R.sub.3 represents --SO.sub.3 M or a hydrogen atom; R.sub.4 represents a hydrogen atom, --SO.sub.3 M or --NHR.sub.5, where R.sub.5 represents a hydrogen atom, a phenyl group that may have a substituent, or a group of the formula ##STR2## where R.sub.6 and R.sub.7 represent independently a hydrogen atom or --C.sub.2 H.sub.4 OH; M represents an alkali metal, an ammonium group or an organic ammonium group; and 1, m and n represent independently an integer of 0 or 1.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: May 5, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuhiro Shirota, Tsuyoshi Eida, Megumi Saito, Takao Yamamoto
  • Liquid jet recording head
    Patent number: 5086307
    Abstract: A liquid jet recording head comprising a cured product of an active energy-ray-curing resin composition as at least a part of its constitution, said composition comprises:(A) a graft copolymerized polymer having a number average molecular weight of 5,000 or more and a weight average molecular weight of 50,000 or less which comprises a trunk chain composed mainly of structural units derived from at least one monomer (hereinafter referred to as "monomer (a)") selected from the group consisting of alkyl methacrylates, acrylonitrile and stylene and has graft chains having structural units derived from at least one monomer (hereinafter referred to as "Monomer (b)") selected from the group consisting of the monomers represented by the following formula x and other monomers presented by the formula y: ##STR1## (B) a linear polymer having a number average molecular weight of 50,000 or more and a weight average molecular weight of 350,000 or less and having a glass transition temperature of 60.degree. C.
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: February 4, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiromichi Noguchi, Tadayoshi Inamoto, Megumi Saito
  • Composition and method for developing electrostatic latent images
    Patent number: 5053305
    Abstract: A composition for developing electrostatic latent images in electrographic printing or copying machinery is provided in which a toner component is blended with 10 to 40% by weight of a carrier. The toner component includes magnetic toner particles each having magnetic powder bound in a resin, and magnetic particles in admixture with the magnetic toner particles, preferably as an external additive in an amount of 0.1 to 10% by weight.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: October 1, 1991
    Assignee: TDK Corporation
    Inventors: Kazuo Aoki, Akira Kakinuma, Megumi Saito, Motohiko Makino