Patents by Inventor Keiji Shimiya
Keiji Shimiya 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: 4701622Abstract: A fluorescent screen having a sensitivity variation in which a plurality of gradations (continuous density variation) whose end edges are shifted by a predetermined distance is formed on a support of phosphor and a phosphor layer is provided thereon, and a method of manufacturing such screen.Type: GrantFiled: September 20, 1984Date of Patent: October 20, 1987Assignees: Canon Kabushiki Kaisha, Toppan Printing Co. Ltd., Kasei Optonix, Ltd.Inventors: Yuichiro Koizumi, Masaki Nojima, Keiji Shimiya
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Patent number: 4536436Abstract: A radiographic image conversion screen comprises a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth phosphor.Type: GrantFiled: May 21, 1984Date of Patent: August 20, 1985Assignee: Kasei Optonix, Ltd.Inventors: Hidehiko Maeoka, Etsuo Shimizu, Yujiro Suzuki, Keiji Shimiya, Norio Miura
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Patent number: 4529647Abstract: A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth oxysulfide phosphor. The green emitting rare earth oxysulfide phosphor is represented by the formula: (Ln.sub.1-i, Yi, Tba, Rb).sub.2 O.sub.2 S where Ln is at least one element selected from the group consisting of La, Ga and Lu, R is at least one element selected from the group consisting of Dy, Pr, Yb and Nd, and i, a and b are numbers within the ranges of 0.ltoreq.i.ltoreq.0.35, 0.0005.ltoreq.a.ltoreq.0.09 and 0.0002.ltoreq.b.ltoreq.0.01 respectively.Type: GrantFiled: March 8, 1984Date of Patent: July 16, 1985Assignee: Kasei Optonix, Ltd.Inventors: Hidehiko Maeoka, Etsuo Shimizu, Yujiro Suzuki, Keiji Shimiya, Norio Miura
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Patent number: 4507563Abstract: A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer consisting essentially of a green emitting rare earth phosphor.Type: GrantFiled: July 9, 1984Date of Patent: March 26, 1985Assignee: Kasei Optonix, Ltd.Inventors: Hidehiko Maeoka, Etsuo Shimizu, Yujiro Suzuki, Keiji Shimiya, Norio Miura
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Patent number: 4486486Abstract: A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth oxysulfide phosphor. The green emitting rare earth oxysulfide phosphor is represented by the formula: (Ln.sub.1-i, Y.sub.i, Tb.sub.a, R.sub.b).sub.2 O.sub.2 S where Ln is at least one element selected from the group consisting of La, Gd and Lu, R is at least one element selected from the group consisting of Dy, Pr, Yb and Nd, and i, a and b are numbers within the ranges of 0.ltoreq.i.ltoreq.0.35, 0.0005.ltoreq.a.ltoreq.0.09 and 0.0002.ltoreq.b.ltoreq.0.01, respectively.Type: GrantFiled: September 30, 1982Date of Patent: December 4, 1984Assignee: Kasei Optonix, Ltd.Inventors: Hidehiko Maeoka, Etsuo Shimizu, Yujiro Suzuki, Keiji Shimiya, Norio Miura
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Patent number: 4362944Abstract: In an intensifying screen composed of a support, a fluorescent layer disposed on the support and a protective layer disposed on the fluorescent layer, the fluorescent layer is composed of one or more phosphors selected from the group consisting of a terbium activated rare earth oxysulfide phosphor, a divalent europium activated alkali earth metal fluorohalide phosphor and a silver activated sulfide phosphor, and the protective layer is a light absorption layer which absorbs a part of light emitted by the fluorescent layer.Type: GrantFiled: March 10, 1981Date of Patent: December 7, 1982Assignee: Kasei Optonix Ltd.Inventors: Yujiro Suzuki, Norio Mirua, Keiji Shimiya
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Patent number: 4292107Abstract: An intensifying screen having high physical durability and chemical resistance in which a curable resin is used as a resinous binder of a radioluminescent phosphor can easily be manufactured by employing an ultraviolet radiation-curable resin composition as the resinous binder. A dispersion comprising the ultraviolet radiation-curable resin composition and the radioluminescent phosphor dispersed in the composition is applied to the surface of a support to form a coating on the support, and the coating is cured by exposure to ultraviolet radiation to form a fluorescent layer on the support.Type: GrantFiled: February 6, 1979Date of Patent: September 29, 1981Assignee: Kasei Optonix, Ltd.Inventors: Michio Tanaka, Norio Miura, Keiji Shimiya
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Patent number: 4205234Abstract: A radiographic intensifying screen having high radiographic image quality is composed of a support and a fluorescent layer formed on the support. The fluorescent layer contains a pigment coated phosphor in which pigment particles adhere to the surface of the phosphor and partly absorb the light emitted by the phosphor.Type: GrantFiled: January 16, 1978Date of Patent: May 27, 1980Assignee: Kasei Optonix, Ltd.Inventors: Yujiro Suzuki, Keiji Shimiya, Takashi Miyagawa
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Patent number: 4138529Abstract: A complex halide phosphor represented by the following composition formula and an X-ray image converter using the same:(Me.sub.1-f,Mg.sub.f )F.sub.2.aMe' X.sub.2.bKX'.cMe" SO.sub.4 :dEu.sup.2+,eTb.sup.3+wherein Me, Me' and Me" each represents at least one of the alkaline earth metals of the group consisting of barium, strontium and calcium; X and X' each represents at least one of chlorine and bromine; and a, b, c, d, e and f are numbers defined by one of the following five combinations:1. 0.80.ltoreq.a.sub.1 .ltoreq.1.50, 0.10.ltoreq.b.sub.1 .ltoreq.1.50, c.sub.1 =0, 0.001.ltoreq.d.sub.1 .ltoreq.0.20, e.sub.1 =0 and f.sub.1 =0.2. 0.30.ltoreq.a.sub.2 .ltoreq.1.50, 0.10.ltoreq.b.sub.2 .ltoreq.2.00, 0.01.ltoreq.c.sub.2 .ltoreq.1.00, 0.001.ltoreq.d.sub.2 .ltoreq.0.20, e.sub.2 =0 and f.sub.2 =0.3. a.sub.3 =1, b.sub.3 =0, c.sub.3 =0, 0.01.ltoreq.d.sub.3 .ltoreq.0.10, 0<e.sub.3 .ltoreq.0.05 and f.sub.3 =0.4. a.sub.4 =1, b.sub.4 =0, c.sub.4 =0, 0.001.ltoreq.d.sub.4 .ltoreq.0.20, e.sub.4 =0 and 0<f.sub.4 .Type: GrantFiled: June 16, 1977Date of Patent: February 6, 1979Assignee: Dai Nippon Toryo Co., Ltd.Inventors: Etsuo Mori, Keiji Shimiya, Norio Miura, Yujiro Suzuki
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Patent number: 4109152Abstract: An X-ray intensifying screen having a high speed and capable of providing good image quality superior in sharpness, granularity and contrast comprising a support having formed thereon a fluorescent layer composed of a complex halide phosphor represented by the composition formula shown below and having further formed on the fluorescent layer another fluorescent layer composed of a calcium tungstate phosphor:(Me.sub.1-f, Mg.sub.f)F.sub.2 .multidot.aMe'X.sub.2 .multidot.bKX'.multidot.cMe"SO.sub.4 :dEu.sup.2+,eTb.sup.3+wherein Me, Me' and Me" each represents at least one of the alkaline earth metals of the group consisting of barium, strontium and calcium; X and X' each represents at least one of chlorine and bromine; and a, b, c, d, e and f are the numbers defined by one of the following five combinations:1. 0.80.ltoreq.a.sub.1 .ltoreq.1.50, 0.10.ltoreq.b.sub.1 .ltoreq.1.50, c.sub.1 .dbd.0, 0.001.ltoreq.d.sub.1 .ltoreq.0.20, e.sub.1 .dbd.0 and f.sub.1 .dbd.0;2. 0.30.ltoreq.a.sub.2 .ltoreq.1.50, 0.10.ltoreq.b.Type: GrantFiled: July 26, 1977Date of Patent: August 22, 1978Assignee: Dai Nippon Toryo Co., Ltd.Inventors: Yuji Aoki, Keiji Shimiya, Norio Miura, Etsuo Mori, Yujiro Suzuki
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Patent number: 4090085Abstract: In an intensifying screen composed of a support layer, a phosphor layer and a protective layer or of a support layer, a reflective layer, a phosphor layer and a protective layer, a carbon black layer is interposed between the support layer and the phosphor layer or the reflective layer. Further, antistatic agents are mingled in the protective layer.Type: GrantFiled: August 23, 1976Date of Patent: May 16, 1978Assignees: Dai Nippon Toryo Co., Ltd., Fuji Photo Film Co., Ltd.Inventors: Keiji Shimiya, Norio Miura, Masao Takano, Kunio Ishigaki
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Patent number: 4039840Abstract: A radiographic intensifying screen having improved response function in the low spatial frequency region and high sharpness comprising a support and a fluorescent layer formed on the support, said fluorescent layer having dispersed therein fluorescent substance grains and having a grain size distribution of the fluorescent substance grains such that the grain size becomes smaller gradually from the front surface of the fluorescent layer to the back surface of the layer.Type: GrantFiled: July 29, 1975Date of Patent: August 2, 1977Assignee: Dai Nippon Toryo Co., Ltd.Inventors: Keiji Shimiya, Norio Miura