Patents by Inventor Shusaku Eguchi
Shusaku Eguchi 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: 4978472Abstract: A rare earth element activated complex halide phosphor represented by the formulaBaF.sub.2.aBaX.sub.2.bMgF.sub.2.cMe.sup.I F.dMe.sup.II F.sub.2.eMe.sup.III F.sub.3 :fLnwherein X is at least one halogen selected from the group consisting of Cl, Br and I, Me.sup.I is at least one alkali metal selected from the group consisting of Li and Na, Me.sup.II is at least one divalent metal selected from the group consisting of Be, Ca Sr, Me.sup.III is at least one trivalent metal selected from the group consisting of Al, Ga, Y and La, Ln is at least one rare earth element selected from the group consisting of Eu, Ce an Tb, and a, b, c, d, e and f are numbers satisfying the conditions of 0.90.ltoreq.a.ltoreq.1.05, 0.ltoreq.b.ltoreq.1.2, 0.ltoreq.c.ltoreq.0.9, 0.ltoreq.d.ltoreq.1.2, 0.ltoreq.e.ltoreq.0.03, 10.sup.-6 .ltoreq.f.ltoreq.0.03 and c+d+e.noteq.0.Type: GrantFiled: June 21, 1985Date of Patent: December 18, 1990Assignee: Kasei Optonix, Ltd.Inventors: Noboru Kotera, Shusaku Eguchi, Norio Miura
-
Patent number: 4889996Abstract: A radiation image storage panel for obtaining a radiation image of an object by causing said panel to absorb a radiation transmitted through said object and then exposing the panel to light of wavelength ranging from 450 to 800 nm to cause the panel to release radiation energy stored therein as fluorescent light, said panel having a fluorescent layer of a rare earth element activated complex halide stimulable phosphor represented by the formulaBaF.sub.2.aBaX.sub.2.bMe.sup.I F.cMe.sup.II F.sub.2.dMe.sup.III F.sub.3 :eLnwherein X is at least one halogen selected from the group consisting of chlorine, bromine and iodine, Me.sup.I is at least one alkali metal selected from the group consisting of lithium and sodium, Me.sup.II is at least one divalent metal selected from the group consisting of beryllium, calcium and strontium, Me.sup.Type: GrantFiled: June 30, 1986Date of Patent: December 26, 1989Assignee: Kasei Optonix, Ltd.Inventors: Noboru Kotera, Shusaku Eguchi, Norio Miura
-
Patent number: 4512911Abstract: A rare earth element activated complex halide phosphor represented by the formulaBaF.sub.2.aBaX.sub.2.bMgF.sub.2.cMe.sup.I F.dMe.sup.II F.sub.2.eMe.sup.III F.sub.3 :fLnwherein X is at least one halogen selected from the group consisting of Cl, Br and I, Me.sup.I is at least one alkali metal selected from the group consisting of Li and Na, Me.sup.II is at least one divalent metal selected from the group consisting of Be, Ca and Sr, Me.sup.III is at least one trivalent metal selected from the group consisting of Al, Ga, Y and La, Ln is at least one rare earth element selected from the group consisting of Eu, Ce and Tb, and a, b, c, d, e and f are numbers satisfying the conditions of 0.90.ltoreq.a.ltoreq.1.05, 0.ltoreq.b.ltoreq.1.2, 0.ltoreq.c.ltoreq.0.9, 0.ltoreq.d.ltoreq.1.2, 0.ltoreq.e.ltoreq.0.03, 10.sup.-6 .ltoreq.f.ltoreq.0.03 and c+d+e.noteq.0.Type: GrantFiled: September 20, 1983Date of Patent: April 23, 1985Assignee: Kasei Optonix, Ltd.Inventors: Noboru Kotera, Shusaku Eguchi, Norio Miura
-
Patent number: 4400619Abstract: A radiation image conversion panel is made of a stimulable phosphor which stores radiation energy when exposed to a radiation and emits light when stimulated by visible light or infrared rays. The panel is subjected to excitation before it is exposed to a radiation for recording or storing a radiation image therein by exposing the panel to light having a wavelength within the range of stimulating light wavelength of the stimulable phosphor used in the panel. By exciting the panel before exposure to radiation, the energy of radiation stored therein which will cause a noise is removed therefrom.Type: GrantFiled: July 11, 1980Date of Patent: August 23, 1983Assignee: Fuji Photo Film Co., Ltd.Inventors: Noboru Kotera, Shusaku Eguchi, Masanori Teraoka, Kenji Takahashi, Junji Miyahara
-
Patent number: 4394581Abstract: A radiation image storage panel having a fluorescent layer which comprises a binder and a stimulable phosphor dispersed therein. Further, the panel is colored with a colorant so that the mean reflectance of the panel in the wavelength region of the stimulating rays of the stimulable phosphor is lower than the mean reflectance of the panel in the wavelength region of the light emitted by the stimulable phosphor upon stimulation thereof. The panel provides an image of high sharpness.Type: GrantFiled: June 5, 1980Date of Patent: July 19, 1983Assignee: Fuji Photo Film Co., Ltd.Inventors: Kenji Takahashi, Hisashi Yamazaki, Junji Miyahara, Noboru Kotera, Shusaku Eguchi, Norio Miura
-
Patent number: 4307320Abstract: Pigment coated phosphors comprising a europium activated yttrium oxysulfide phosphor having a europium activator value within a range of 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered thereto red colored pigment particles such as cadmium sulfoselenide pigment particles, rouge pigment particles or red lead pigment particles, in respective amounts of 0.1 to 2.0 wt %, 0.05 to 2.0 wt % or 0.1 to 12 wt %, based upon the europium activated yttrium oxysulfide phosphor; and a cathode ray tube for high contrast color television using as a red emitting phosphor at least one of the three pigment coated phosphors.Type: GrantFiled: June 19, 1979Date of Patent: December 22, 1981Assignee: Kasei Optonix, Ltd.Inventors: Noboru Kotera, Thihiro Yoshida, Toshiaki Hatsumi, Kazuhito Iwasaki, Isao Iwamoto, Katuzo Kanda, Seiji Murakami, Shusaku Eguchi
-
Patent number: 4261854Abstract: A barium fluorohalide phosphor represented by the formulaBaFX:xCe,yAwherein X is at least one halogen selected from the group consisting of chlorine, bromine and iodine, A is at least one metallic element selected from the group consisting of indium, thallium, gadolinium, samarium and zirconium, and x and y are numbers satisfying the conditions of 0<x.ltoreq.2.times.10.sup.31 1 and 0<y.ltoreq.5.times.10.sup.-2, respectively. The phosphor emits stimulated light of higher luminance than the conventional cerium activated barium fluorohalide phosphor when stimulated by light of wavelength ranging from 450 to 800 nm after exposure to ionizing radiations such as X-rays or .gamma.-rays, ultraviolet rays, cathode rays, or the like. Further, the phosphor emits spontaneous light of high luminance when excited by ionizing radiations, ultraviolet rays, cathode rays, or the like.Type: GrantFiled: December 18, 1979Date of Patent: April 14, 1981Assignees: Kasei Optonix, Ltd., Fuji Photo Film Co., Ltd.Inventors: Noboru Kotera, Shusaku Eguchi, Junji Miyahara, Seiji Matsumoto, Hisatoyo Kato
-
Patent number: 4219587Abstract: Pigment-coated phosphors which may be used in the production of a cathode-ray tube of a high contrast for a color television receiver can be produced by adding a pigment and an anionic polymer emulsion to an aqueous suspension of a phosphor and then making the system neutral or weakly acidic or adding a cationic polymer emulsion or carrying out both of these steps so that the phosphor and the pigment may be coated with the polymer.Type: GrantFiled: December 19, 1977Date of Patent: August 26, 1980Assignees: Hitachi, Ltd., Kasei Optonix, Ltd.Inventors: Yoichi Oba, Tsuyoshi Kano, Masaaki Hayashi, Hiroshi Takada, Katuzo Kanda, Shusaku Eguchi
-
Patent number: 4206250Abstract: A pigment-coated phosphor having good finish sieve passability and capable of forming a fluorescent film with excellent properties can be produced from a process characterized by:(1) the first step of adding to a water suspension of a phosphor and a pigment an anionic polymer emulsion which has a minimum film forming temperature of less than 30.degree. C.;(2) the second step of adding a cationic polymer emulsion which has a minimum film forming temperature of 30.degree. C. or lower;(3) the thrid step of adding an anionic polymer emulsion which has a minimum film forming temperature of 30.degree. C. or higher; and(4) the fourth step of making the mixture system neutral or weakly acidic.Type: GrantFiled: October 26, 1978Date of Patent: June 3, 1980Assignees: Hitachi, Ltd., Kasei Optonix, Ltd.Inventors: Yoichi Oba, Katuzo Kanda, Shusaku Eguchi, Kazuhito Iwasaki
-
Patent number: 4172920Abstract: A pigment coated phosphor used as a green emitting phosphor for a high contrast color television cathode ray tube. A green emitting phosphor is coated with TiO.sub.2 --ZnO--CoO--NiO system pigment particles.Type: GrantFiled: April 28, 1978Date of Patent: October 30, 1979Assignee: Dai Nippon Toryo Co., Ltd.Inventors: Katuzo Kanda, Noboru Kotera, Shusaku Eguchi, Hidenaga Horiuchi, Kazuhito Iwasaki
-
Patent number: 4152483Abstract: On the surface of a phosphor, pigment particles are uniformly adhered by a layer of a gelatin-gum arabic mixture. A process for manufacturing such a pigment coated phosphor includes the steps of preparing an aqueous solution of gelatin and an aqueous solution of gum arabic, allowing the phosphor to disperse homogeneously into one of these aqueous solutions, allowing the pigment particles to disperse homogeneously into the other aqueous solution, and mixing the so obtained phosphor and pigment dispersions.Type: GrantFiled: November 18, 1977Date of Patent: May 1, 1979Assignee: Dai Nippon Toryo Co., Ltd.Inventors: Katuzo Kanda, Noboru Kotera, Seiji Murakami, Thihiro Yoshida, Shusaku Eguchi, Toshiaki Hatsumi, Kazuhito Iwasaki, Isao Iwamoto