Patents by Inventor Miyuki Yokoyama

Miyuki Yokoyama 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).

  • Patent number: 5393443
    Abstract: A hard-coating, heat-absorbing composition which is capable of absorbing near-infrared rays from sunlight and a heat-shielding substance is disclosed. The composition comprises a silicone varnish for hard-coating comprising polysiloxane and, dissolved therein, diphenylthiourea and copper monobutyl-o-phthalate. It can be applied to plastic substrate and heated to cure the silicone varnish, whereupon curing of polysiloxane and production of a heat-absorbing compound are simultaneously effected. The composition ensures to provide various substrates with a heat-shielding characteristic.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: February 28, 1995
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Miyuki Yokoyama
  • Patent number: 5391666
    Abstract: A shading and light-responsive plate or film is composed or a transparent polymer containing a novel phthalic acid derivative metal salt and further near infrared ray shading plate or film is composed of a transparent polymer containing the aforesaid phthalic acid derivative copper salt or lead salt and a near infrared absorbing coloring material formed from a thioamide derivative or thiourea derivative.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: February 21, 1995
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
  • Patent number: 5369199
    Abstract: A shading and light-responsive plate or film is composed of a transparent polymer containing a novel phthalic acid derivative metal salt and further a near infrared ray shading plate or film is composed of a transparent polymer containing the aforesaid phthalic acid derivative copper salt or lead salt and a near infrared absorbing coloring material formed from a thioamide derivative or thiourea derivative.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: November 29, 1994
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
  • Patent number: 5273800
    Abstract: In an optical recording medium fitted on a substrate a recording layer containing a light absorbent which absorbs light having a central wave length in the near infrared region, performs thermal conversion of light energy and emits heat energy, and a heat-sensitive recording material, a high density image can be recorded with a small amount of laser irradiation by using a specific water soluble infrared absorbing compound as a light absorbent.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: December 28, 1993
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
  • Patent number: 5236633
    Abstract: A plate or a sheet being capable of absorbing near IR-rays, which is prepared by heating both at least a raw material of a transparent polymer and a mixture of a thiourea compound and a copper compound. This invention provides superior optical materials for shielding sunlight thermic rays, better information recording materials and the like.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: August 17, 1993
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Miyuki Yokoyama
  • Patent number: 5234797
    Abstract: In an optical recording medium, a light absorbent can be incorporated into a color-developing layer without separately constituting a light absorbing layer by holding the light absorbent in a dispersed or dissolved state in a solvent soluble or heat fusible material. Thus, an optical recording medium which exhibits satisfactory image density with a small amount of the light absorbent can be provided.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: August 10, 1993
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
  • Patent number: 5202450
    Abstract: A shading and light-responsive plate or film is composed of a transparent polymer containing a novel phthalic acid derivative metal salt and further a near infrared ray shading plate or film is composed of a transparent polymer containing the aforesaid phthalic acid derivative copper salt or lead salt and a near infrared absorbing coloring material formed from a thioamide derivative or thiourea derivative.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: April 13, 1993
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
  • Patent number: 5200947
    Abstract: Features of the present invention are connected with an optical recording medium which comprises a substrate, a heat-sensitive color-developing layer containing a basic dye and an organic developer, and a light-absorbing layer containing a near infrared absorbent, the aforesaid layers being superposed upon the substrate, a reflectance at the dominant wave length of a laser beam on the surface of the recording medium being from 15% to 65%; a method for recording by irradiating the optical recording medium with a laser beam condensed by a condenser having a focal length of 0.5 mm or more and a numerical aperture (N.A) of 0.1 to 0.5; and a device for use in the above-mentioned method.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: April 6, 1993
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Akio Sekine, Miyuki Yokoyama
  • Patent number: 5178990
    Abstract: A method of identifying the output energy, main wavelength, position, pattern, etc., of light, which comprises irradiating a photosensitive coloring medium comprising a base material, a heat-sensitive coloring material, and a light absorptive material releasing heat sufficient for coloring the heat-sensitive coloring material by absorbing the light and identifying the output energy, main wavelength, position, pattern, etc., of the light from the colored extent thereof.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: January 12, 1993
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
  • Patent number: 5100711
    Abstract: Features of the present invention are connected with an optical recording medium which comprises a substrate, a heat-senstive color-developing layer containing a basic dye and an organic developer, and a light-absorbing layer containing a near infrared absorbent, the aforesaid layers being superposed upon the substrate, a reflectance at the dominant wave length of a laser beam on the surface of the recording medium being from 15 to 65%; a method for recording by irradiating the optical recording medium with a laser beam condensed by a condenser having a focal length of 0.5 mm or more and a numerical aperture (N.A) of 0.1 to 0.5; and a device for use in the above-mentioned method.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: March 31, 1992
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Akio Sekine, Miyuki Yokoyama
  • Patent number: 5061536
    Abstract: The present invention is related to an optical recording medium comprising a substrate, a light-absorbing layer containing a near infrared absorbent and a heat-sensitive color-developing layer, these layers being superposed upon the substrate. The near infrared absorbent which is used in the present invention is prepared by mixing and heating a thiourea derivative and a metallic compound. This near infrared absorbent has relatively uniform and strong absorption spectra all over the near infrared region, and therefore, on the optical recording medium of the present invention, an image having a high resolution can be directly obtained by the irradiation of the near infrared rays.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: October 29, 1991
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Akio Sekine, Miyuki Yokoyama