Patents by Inventor Tomoaki Nagai
Tomoaki Nagai 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).
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Patent number: 5482913Abstract: A dispersion of a carbonate type blocked color developer having a hydroxyl group having a color developing function which is blocked by an O-substituted oxycarbonyl group (--(C.dbd.O)OR.sub.1), and a metal salt of an organic acid or inorganic acid or a leuco dye are mixed to obtain an opaque undeveloped coating color, and the coating color is coated on paper or the like to obtain a recording sheet. Also, the coating color is further mixed with a light absorbent to obtain an opaque undeveloped coating color, which is coated on paper or the like to obtain an optical recording sheet.Type: GrantFiled: December 15, 1993Date of Patent: January 9, 1996Assignee: Nippon Paper Industries, Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Toshiyuki Takano, Akio Sekine
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Patent number: 5470816Abstract: In a thermal recording sheet having a thermal recording layer containing a colorless or pale colored dye precursor and a color developer reactable with the dye precursor upon heating to develop a color, a dimerized or trimerized urea compound is used as the color developer to obtain a thermal recording sheet which is superior in ground color stability and a thermal recording sheet having a reversible recordability.Type: GrantFiled: July 6, 1994Date of Patent: November 28, 1995Assignee: Nippon Paper Industries Co., Ltd.Inventors: Toshimi Satake, Toshiyuki Takano, Hideki Hayasaka, Yukiko Uehori, Tomoaki Nagai
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Patent number: 5434119Abstract: A transparent recording medium is disclosed which can directly record a fine, precise image. With the recording medium, a compact, fine image occupying a small storage space can be easily enlarged and confirmed by an enlarged projection. It is prepared by applying a coating liquid for recording comprising a developer in which a hydroxyl group with a developing function is blocked by an N-substituted carbamoyl group or an O-substituted oxycarbonyl group, an iron salt of an organic acid or a leuco dye, a near-infrared absorbing agent, and a binder, uniformly dissolved in an organic solvent such as MEK, to a transparent plastic substrate, and drying to obtain a transparent recording layer with a thickness of 3 .mu.m to 8 .mu.m. A visible, precise, fine direct image can then be recorded using a semiconductor laser beam.Type: GrantFiled: June 24, 1992Date of Patent: July 18, 1995Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Toshiyuki Takano, Akio Sekine
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Patent number: 5393443Abstract: 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: GrantFiled: June 15, 1992Date of Patent: February 28, 1995Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Miyuki Yokoyama
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Patent number: 5391666Abstract: 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: GrantFiled: August 26, 1993Date of Patent: February 21, 1995Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
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Patent number: 5369199Abstract: 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: GrantFiled: August 2, 1991Date of Patent: November 29, 1994Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
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Patent number: 5354514Abstract: Near infrared absorbing composition and material comprising a specific thioamide compound and a copper compound and/or a lead compound. The composition and material of this invention provide an uniform absorption over a near IR-region without decreasing other properties.Type: GrantFiled: May 22, 1992Date of Patent: October 11, 1994Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai
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Patent number: 5273800Abstract: 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: GrantFiled: June 23, 1992Date of Patent: December 28, 1993Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
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Patent number: 5236633Abstract: 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: GrantFiled: August 24, 1992Date of Patent: August 17, 1993Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Miyuki Yokoyama
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Patent number: 5234797Abstract: 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: GrantFiled: February 20, 1990Date of Patent: August 10, 1993Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
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Phthalic acid derivative metal salt and shading and light-responsive plate containing the metal salt
Patent number: 5202450Abstract: 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: GrantFiled: September 27, 1990Date of Patent: April 13, 1993Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine -
Patent number: 5200947Abstract: 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: GrantFiled: December 20, 1991Date of Patent: April 6, 1993Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Akio Sekine, Miyuki Yokoyama
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Patent number: 5178990Abstract: 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: GrantFiled: August 9, 1990Date of Patent: January 12, 1993Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Miyuki Yokoyama, Akio Sekine
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Patent number: 5100711Abstract: 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: GrantFiled: February 5, 1990Date of Patent: March 31, 1992Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Akio Sekine, Miyuki Yokoyama
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Patent number: 5075146Abstract: A novel optical recording medium is here disclosed in which an underlayer and a heat-sensitive color-developing layer are laminated in this order onto a base material, the underlayer containing a near infrared absorbent, the heat-sensitive color-developing layer containing a basic colorless dye and an organic developer. The near infrared absorbent may be a dispersible near infrared absorbent which absorbs a wave length in a near infrared region of 0.7 to 2.5 .mu.m, and this dispersible near infrared absorbent is graphite, copper sulfide, lead sulfide, black titanium or tri-iron tetroxide. A transparent protective layer may be superimposed on the heat-sensitive color-developing layer.Type: GrantFiled: October 25, 1989Date of Patent: December 24, 1991Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Akio Sekine
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Patent number: 5061536Abstract: 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: GrantFiled: February 5, 1990Date of Patent: October 29, 1991Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Hiroshi Fukui, Akio Sekine, Miyuki Yokoyama
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Patent number: 4910185Abstract: A heat-sensitive recording material including a support and a color-developing layer comprising an electron doner, an electron acceptor and a fluorescence-dyestuff and/or pigment. The heat-sensitive recording material is superior in both readability in an irradiation of UV-ray and optical readability in near infrared region.Type: GrantFiled: February 22, 1988Date of Patent: March 20, 1990Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Toshiaki Minami, Tomoaki Nagai, Fumio Fujimura
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Patent number: 4898902Abstract: A binder composition for injection molding of at least one of metal powder and ceramic powder which comprises polyoxyethylene/polyoxypropylene condensation polyether as the main component together with from 10 to 100 parts by weight of at least one auxiliary component selected from the group consisting of natural waxes, synthetic waxes, fatty acids and esters per 100 parts of said polyoxyethyene/polyoxypropylene condensation polyether.Type: GrantFiled: June 27, 1988Date of Patent: February 6, 1990Assignees: Adeka Fine Chemical Co., Ltd., Asahi Denka Kogyo Kabushiki KaishaInventors: Tomoaki Nagai, Hideyuki Yamanashi, Hideo Hachimori
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Patent number: 4868151Abstract: A heat-sensitive recording material has a support and a color-developing layer which comprises a particular sulfone as an organic color-developing agent and a particular fluorene-type leuco dyestuff as a colorless basic chromogenic dyestuff. This heat-sensitive recording material is superior in light resistance, weather resistance, oil resistance and optical readability in the near infrared region.Type: GrantFiled: June 10, 1987Date of Patent: September 19, 1989Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Toshiaki Minami, Tomoaki Nagai, Fumio Fujimura
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Patent number: 4861749Abstract: A heat-sensitive recording material comprises a support and a color-developing layer having a particular saturated higher fatty acid iron salt, a particular polyvalent phenolic derivative and a colorless leuco dyestuff.The heat-sensitive recording material of the present invention provides both a superior image contrast and a high stability of developed image against oily substances and solvents.Type: GrantFiled: June 22, 1988Date of Patent: August 29, 1989Assignee: Jujo Paper Co., Ltd.Inventors: Toshimi Satake, Tomoaki Nagai, Fumio Fujimura