Patents Examined by Matthew Hoban
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Patent number: 8335037Abstract: [Problem] When a nonreciprocal device operating at 100 GHz to 300 GHz is to be realized by using a conventional magnetic material of garnet-type ferrite or spinel-type ferrite, a huge permanent magnet is required and, therefore, it is very difficult to achieve a millimeter-wave band nonreciprocal device for practical use. [Solving means] To solve this problem, there is provided a millimeter-wave band nonreciprocal device composed of a magnetic material represented by a formula ?-MxFe2-xO3 (0<x<2), wherein M is at least one of elements In, Ga, Al, Sc, Cr, Sm, Yb, Ce, Ru, Rh, Ti, Co, Ni, Mn, Zn, Zr, and Y and the magnetic material having ?-phase hematite as a principal phase exhibits strong coercive force and anisotropic magnetic field at room temperature. Dimensions of a magnetic circuit containing a permanent magnet for operations of the nonreciprocal device can be made remarkably small and, by optimum design, the use of the magnetic circuit can be made unnecessary.Type: GrantFiled: October 17, 2008Date of Patent: December 18, 2012Assignees: The University of Tokyo, Dowa Electronics Materials Co., Ltd.Inventors: Shigeru Takeda, Shin-Ichi Ohkoshi
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Patent number: 8330349Abstract: The present invention is directed to phosphors and white light emitting diodes and a method for preparing a Ce3+ doped calcium silicate phosphor represented by a chemical formula of (Ca1-yMy)2-x-zSiO4:Ce3+x,N+z, wherein x is 0<x?0.5, y is 0?y?0.5, z is 0<z?0.5, M is at least one metal selected from Mg, Sr and Ba, and N is at least one metal selected from Li, Na, K and Rb, as well as white LEDs produced comprising the same. The phosphor of the present invention can be excited using conventional InGaN-based blue light emitting diodes, as well as GaN-based near-UV light emitting diodes to emit light across the visible spectrum.Type: GrantFiled: September 29, 2008Date of Patent: December 11, 2012Assignee: Korea Advanced Institute of Science and TechnologyInventors: Ho Seong Jang, Duk Young Jeon
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Patent number: 8329061Abstract: Photoluminescent phosphors wherein some of the oxygen anions in the phosphor matrix have been replaced by halides or nitride. In addition, photoluminescent phosphors wherein some of the oxygen anions in the phosphor matrix have been replaced by halides or nitride and a charge compensator has been included. The phosphors are based on green emitting and blue-green emitting aluminates.Type: GrantFiled: July 15, 2009Date of Patent: December 11, 2012Assignee: Performance Indicator, LLCInventor: Weiyi Jia
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Patent number: 8303846Abstract: It is an object of the present invention to provide an infra-red light emitting phosphor having an excellent chemical stability and desirable light emitting properties. The infra-red light emitting phosphor is represented by a chemical formula: (A1-x-yNdxYby)VO4, wherein A represents at least one element selected from yttrium (Y), gadolinium (Gd), lutetium (Lu) and lanthanum (La); x and y respectively satisfy the requirements: 0.01?x?0.3 and 0.01?y?0.4, provided that (x+y)?0.5 and 0.2?(y/x)?6. This vanadate phosphor having the constitution described above can act as an infra-red light emitting phosphor having an excellent chemical stability and desirable light emitting properties.Type: GrantFiled: March 27, 2006Date of Patent: November 6, 2012Assignee: Nemoto & Co., Ltd.Inventors: Takeshi Takahara, Yasushi Aoki, Kaori Kanesaka, Takashi Murase
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Patent number: 8287758Abstract: The present invention provides a novel fluorescent material which has a luminance higher than that of the conventional rare earth ion-dispersed fluorescent materials and is excellent in light resistance and long-term stability, and also an optical device, such as a high-luminance display panel or lighting equipment, which uses such a fluorescent material. Semiconductor ultrafine particles are characterized by maintaining 50% or more fluorescence quantum yield of photoluminescence when they are kept dispersed in water at 10° C. to 20° C. in air for 5 days. The fluorescent material is obtained by dispersing such semiconductor ultrafine particles in a glass matrix using a sol-gel process.Type: GrantFiled: January 23, 2004Date of Patent: October 16, 2012Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Norio Murase, Chunliang Li
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Patent number: 8278816Abstract: An electroluminescent lamp having a high color rendering index (CRI) can be made using a phosphor blend comprising a mixture of an electroluminescent phosphor and an europium-activated alkaline earth silicon nitride phosphor, wherein the electroluminescent phosphor is selected from a blue-emitting electroluminescent phosphor, a blue-green-emitting electroluminescent phosphor, or a combination thereof. Preferably, the lamp exhibits a CRI of at least about 75, and, more preferably, at least about 80. A preferred blend contains from about 10% to about 20% by weight of the europium-activated alkaline earth silicon nitride phosphor.Type: GrantFiled: September 30, 2004Date of Patent: October 2, 2012Assignee: Global Tungsten & Powders Corp.Inventor: Chung-nin Chau
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Patent number: 8236201Abstract: The present invention provides a phosphor having high luminance, a property of low luminance degradation during driving of a light-emitting device and manufacturing processes, and chromaticity y in PDP comparable to that of BAM:Eu. The present invention is the phosphor represented by the general formula xSrO.yEuO.MgO.zSiO2 where 2.970?x?3.500, 0.001 ?y?0.030, and 1.900?z?2.100 are satisfied, wherein a main peak is present in the range of diffraction angle 2?=16.1 to 16.5 degree in the X-ray diffraction pattern obtained by measurement on the blue phosphor using an X-ray with a wavelength of 0.774 ?, and at least one condition of the following conditions (A1) and (A2) is satisfied: (A1) at least two peaks whose tops are located in the range of diffraction angle 2?=15.3 to 16.1 degree are present; and (A2) at least two peaks whose tops are located in the range of diffraction angle 2?=22.2 to 23.3 degree are present.Type: GrantFiled: March 28, 2008Date of Patent: August 7, 2012Assignee: Panasonic CorporationInventors: Yayoi Kitamura, Seigo Shiraishi, Kojiro Okuyama, Masahiro Sakai
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Patent number: 8211327Abstract: A method for preparing a rare earth permanent magnet material comprising the steps of: disposing a powder comprising one or more members selected from an oxide of R2, a fluoride of R3, and an oxyfluoride of R4 wherein R2, R3 and R4 each are one or more elements selected from among rare earth elements inclusive of Y and Sc on a sintered magnet form of a R1—Fe—B composition wherein R1 is one or more elements selected from among rare earth elements inclusive of Y and Sc, and heat treating the magnet form and the powder at a temperature equal to or below the sintering temperature of the magnet in vacuum or in an inert gas. The invention offers a high performance, compact or thin permanent magnet having a high remanence and coercivity at a high productivity.Type: GrantFiled: March 22, 2005Date of Patent: July 3, 2012Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hajime Nakamura, Koichi Hirota, Takehisa Minowa
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Patent number: 8211326Abstract: The invention relates to a material that can be used for magnetic refrigeration, wherein the material substantially has the general formula (AYB1-Y)2+?CWDXEZ Wherein: A is selected from Mn and Co; B is selected from Fe and Cr; of C, D and E at least two are different, have a non-vanishing concentration and are selected from P, B, Se, Ge, Ga, Si, Sn and Sb; wherein at least one of C, D and E is Ge or Si; W, X, Y and Zeach is a number in the range 0-1, and W+X+Z=1; and?is a number from (?0.1)-(+0.1).Type: GrantFiled: January 29, 2003Date of Patent: July 3, 2012Assignees: Stichting voor de Technische Wetenschappen Utrecht, Universiteit van Amsterdam, Faculteit der Natuuwetenschappen, Wiskunde en Informatica, AmsterdamInventors: Ekkehard Hubertus Brück, Ojiyed Tegusi, Frank Roelof De Boer
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Patent number: 8207661Abstract: The invention provides borate phosphors composed of Ca1-xAlBO4:Mx, wherein M is Pr3+, Nd3+, Eu3+, Eu2+, Gd3+, Tb3+, Ce3+, Dy3+, Yb2+, Er3+, Sc3+, Mn2+, Zn2+, or combinations thereof, and 0?x?0.3. The invention also provides borate phosphors composed of Zn1-x-yB2O4:Eu3+x, Bi3+y, wherein 0?x?0.6 and 0?y?0.6. The borate phosphors emit visible light under the excitation of ultraviolet light or blue light, and may be further collocated with different colored phosphors to provide a white light illumination device.Type: GrantFiled: June 4, 2008Date of Patent: June 26, 2012Assignee: Industrial Technology Research InstituteInventors: Wei-Jen Liu, Yi-Chen Chiu, Chien-Yueh Tung, Yao-Tsung Yeh, Shyue-Ming Jang, Teng-Ming Chen
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Patent number: 8178000Abstract: Disclosed is a deep red phosphor (600 nm to 670 nm) of Mn activity having a chemical formula of (k-x)MgOxAF2GeO2:yMn4+ where k is a real number between 2.8 and 5.0, x is a real number between 0.1 and 0.7, y is a real number between 0.005 and 0.015, and A is Ca, Sr, Ba, Zn, or a mixture thereof, or a mixture of Mg and at least one of Ca, Sr, Ba and Zn. The deep red phosphor has a high excitation efficiency and thus can be applied to light emitting diode (LED) packages, which uses an ultraviolet (UV) light source or a blue light source as an excitation light source. The deep red phosphor is applied to a phosphor layer of a phosphor lamp such as a cold cathode fluorescence lamp (CCFL) and a flat fluorescent lamp (FFL).Type: GrantFiled: February 8, 2008Date of Patent: May 15, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Tae Gon Kim, Kubota Shunichi, Young Sic Kim, Seung Jae Im, Jae Ho Lee
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Patent number: 8177999Abstract: The present invention provides a red phosphor, a method for manufacturing the red phosphor and a light emitting device using the red phosphor, in which the red phosphor is expressed as a chemical formula of (Ca,Sr)1-x-yEuxPbyS, wherein 0.0005?x?0.01 and 0.001?y?0.05. According to the present invention, the red phosphor has improved reliability and luminous efficiency and thus be used to obtain a light emitting device with more excellent color reproducibility and optical characteristic.Type: GrantFiled: June 30, 2006Date of Patent: May 15, 2012Assignee: Seoul Semiconductor Co., Ltd.Inventors: Kyung Nam Kim, Sang Mi Park, Tomizo Matsuoka
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Patent number: 8158027Abstract: A red light fluorescent material adapted for being excited by a first light to emit a red light is provided. The red light fluorescent material has the chemical formula (1) presented below, A2Eu(MO4)(PO4)??(1), in which A represents Li, Na, K, Rb, Cs, or Ag, and M represents Mo, W, or a combination thereof (MoxW(1?x)). The red light fluorescent material can provide a red light with high luminance and good color purity. Moreover, since the composition of the red light fluorescent material includes oxides, the red light fluorescent material has high chemical stability and long lifetime.Type: GrantFiled: June 3, 2009Date of Patent: April 17, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Chuang-Hung Chiu, Teng-Ming Chen, Chi-Neng Mo
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Patent number: 8159126Abstract: A light emitting device with a light source to emit primary light and a light conversion layer to convert at least a part of the primary light into secondary light includes a CaAlSiN light converting material with a transmissivity of ?10% to ?80% for a light in the wavelength range from ?580 to ?1000 nm.Type: GrantFiled: October 26, 2006Date of Patent: April 17, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Peter J. Schmidt, Joerg Meyer, Walter Mayr, Wolfgang Busselt, Hans-Helmut Bechtel
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Patent number: 8142677Abstract: A piezoelectric ceramic composition excellent in all of the electric property Qmax, heat resisting properties and temperature characteristics of oscillation frequencies is provided. The piezoelectric ceramic composition comprises a phase mainly comprising lead zirconate titanate having a perovskite structure and an Al-containing phase. In the piezoelectric ceramic composition, the main component preferably comprises Mn and Nb, and is preferably represented by a composition formula of Pb?[(Mn1/3Nb2/3)xTiyZrz]O3 (wherein 0.97???1.01, 0.04?x?0.16, 0.48?y?0.58, 0.32?z?0.41).Type: GrantFiled: February 28, 2005Date of Patent: March 27, 2012Assignee: TDK CorporationInventors: Masakazu Hirose, Tomohisa Azuma, Norimasa Sakamoto
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Patent number: 8123972Abstract: The present invention is to impart, to a sheet-like soft magnetic material, a configuration in which sheet thickness change is suppressed and in which fluctuation in magnetic permeability is small even under a high-temperature or a high-temperature, high-humidity environment, even when a plurality of thin curable soft magnetic sheets produced by a coating method are laminated. The sheet-like soft magnetic material is formed from a soft magnetic composition which is formed by mixing at least a flat soft magnetic powder, an acrylic rubber, an epoxy resin, a curing agent for the epoxy resin, and a solvent. The flat soft magnetic powder is arranged in an in-plane direction of the sheet-like soft magnetic material. An acrylic rubber having a glycidyl group is used for the acrylic rubber. The weight ratio of the flat soft magnetic powder with respect to the total amount of the acrylic rubber, the epoxy resin, and the curing agent for the epoxy resin is 3.7 to 5.8.Type: GrantFiled: October 22, 2007Date of Patent: February 28, 2012Assignees: Sony Corporation, Sony Chemical & Information Device CorporationInventors: Keisuke Aramaki, Junichiro Sugita, Morio Sekiguchi
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Patent number: 8119030Abstract: Disclosed is a thulium-containing fluorescent substance for a white light emitting diode represented by a following chemical formula 1, (Chemical Formula 1) (M1-X-J7EuxTnIy)2SiO4 where M is a divalent cation metal including Sr or Ba, with 0.005<x<0.05 and 0.005<y<0.05. The silicate-based yellow fluorescent substance according to the present invention is sufficiently excited by a blue light source generated by a blue LED to exhibit a yellow emission, with superior luminous intensity, due to the addition of europium oxide (Eu2O3) and thulium oxide (Tm2O3) as an activator, thereby being suitable for a white LED.Type: GrantFiled: June 5, 2007Date of Patent: February 21, 2012Assignee: Daejoo Electronic Materials Co., Ltd.Inventors: Sang-hyuk Han, Jae-seob Hwang, Il-ji Lim
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Patent number: 8110121Abstract: A piezoceramic composition has a nominal empirical formula of Pb1?aREbAEc[ZrxTiy(FefWw)z]O3. RE is a rare earth metal with a fraction b and AE is an alkaline earth metal with a fraction c. Iron is present with an iron fraction f·z, and tungsten with a tungsten fraction w·z. In addition, the following relationships apply: a<1; 0=b=0.15; 0=c=0.5; f>0; w>0; 0.1=f/w=5; x>0; y>0; z>0 and x+y+z=1. A method of producing a piezoceramic material using the piezoceramic composition has the steps: a) provision of a green ceramic body with the piezoceramic composition, and b) heat treatment of the green body, a piezoceramic of the piezoceramic material being produced from the piezoceramic composition. The heat treatment encompasses calcining and/or sintering. The piezoceramic composition undergoes compaction at below 1000° C.Type: GrantFiled: December 19, 2006Date of Patent: February 7, 2012Assignee: Siemens AktiengesellschaftInventors: Francois Bamiere, Katrin Benkert, Stefan Denneler, Morgane Radanielina, Carsten Schuh
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Patent number: 8029698Abstract: The present invention relates to a method for preparing photoluminescent silicon nanoparticles having uniformly hydrogen-terminated surfaces that are essentially free of residual oxygen. The present invention also relates to a method of preparing a blue-emitting photoluminescent silicon nanoparticle. The present invention further relates to a composition that includes a photoluminescent silicon nanoparticle having a surface that is uniformly hydrogen-terminated and essentially free of residual oxygen. The present invention also relates to a composition including a photoluminescent silicon nanoparticle having a surface that is uniformly coated with an organic layer and essentially free of residual oxygen. The present invention additionally relates to a composition including a photoluminescent silicon nanoparticle stably dispersed in an organic solvent and having a surface that is uniformly coated with an organic layer and essentially free of residual oxygen.Type: GrantFiled: April 19, 2006Date of Patent: October 4, 2011Assignee: The Research Foundation of State University of New YorkInventors: Eli Ruckenstein, Mark T. Swihart, Fengjun Hua
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Patent number: 7998361Abstract: A soft magnetic material includes: a plurality of composite magnetic particles formed from a metal magnetic particle and an insulative coating surrounding a surface of the metal magnetic particle and containing metallic salt phosphate and/or oxide; and a lubricant formed as fine particles added at a proportion of at least 0.001 percent by mass and no more than 0.1 percent by mass relative to the plurality of composite magnetic particles. With this structure, superior lubrication is provided during compacting and desired magnetic characteristics can be obtained after compacting.Type: GrantFiled: March 29, 2005Date of Patent: August 16, 2011Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kazuhiro Hirose, Haruhisa Toyoda, Takao Nishioka, Naoto Igarashi, Toru Maeda, Yoshiyuki Shimada