Patents by Inventor Istvan Deme
Istvan Deme 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: 8746929Abstract: A lighting device combined with an air purification feature is disclosed. At least one function of the device is to provide high quality directional light for general lighting purposes. An additional function is to decompose VOCs and/or destroy microbes in the ambient air. The heat generated by white LEDs is utilized to generate air flow through the device. The geometry is designed to utilize the chimney effect and maximize volumetric flow. The circulated air is purified by a photocatalytic layer applied to the interior surface of the device. The lighting device can be built into pendant luminaires or lamps, thus ensuring vertical orientation of the light module. The exemplary embodiments may be applied in public places, hospitals, ward rooms, and other locations where a cost effective disinfection method is needed.Type: GrantFiled: October 14, 2011Date of Patent: June 10, 2014Assignee: GE Lighting Solutions, LLCInventors: Miklós Budai, László Balázs, István Deme
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Publication number: 20130193835Abstract: This disclosure features fluorescent lamps that include a phosphor layer including at least one phosphor, which in the past has not been commercially usable in lamps or in some cases suffers from performance problems such as poor brightness. These problems of the phosphors were caused, for example, by mercury ion bombardment or exposure to 185 nm radiation from the discharge. These problems are expected to be avoided by coating particles of one or more of the phosphors, such as using atomic layer deposition in which the coating is not more than 500 nm in thickness. Examples of phosphors that can be coated are yttrium vanadate activated with europium or yttrium vanadate phosphate activated with europium. The coating can be selected from the group consisting of alumina, yttria, lanthanum oxide, magnesium aluminate spinel, magnesium oxide and combinations thereof.Type: ApplicationFiled: January 30, 2012Publication date: August 1, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: William Erwin COHEN, William BEERS, Alok SRIVASTAVA, Laszlo BALAZS, Istvan DEME
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Publication number: 20130169150Abstract: A fluorescent lamp has increased weight of emission mix material on the metal coils forming the electrodes. The coating layer of emission mix material includes in the range of 70 weight % to 85 weight % alkaline earth carbonate content. The coating layer of emission mix material has a particle size distribution by volume with two maxima, and one of the maxima is at a particle size that is no more than half and up to one tenth smaller than of the particle size of the other maximum. The smaller of the two maxima constitutes 10 weight % to 40 weight % of the alkaline earth carbonates in the coating layer of emission mix material. A method for making fluorescent lamp includes the step of installing at least one electrode coated with an emission mix material including more than 70 weight % alkaline earth carbonate content.Type: ApplicationFiled: December 29, 2011Publication date: July 4, 2013Inventors: István Deme, Miklós Budai, Imre Dékány, Adam Juhasz
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Publication number: 20130094204Abstract: A lighting device combined with an air purification feature is disclosed. At least one function of the device is to provide high quality directional light for general lighting purposes. An additional function is to decompose VOCs and/or destroy microbes in the ambient air. The heat generated by white LEDs is utilized to generate air flow through the device. The geometry is designed to utilize the chimney effect and maximize volumetric flow. The circulated air is purified by a photocatalytic layer applied to the interior surface of the device. The lighting device can be built into pendant luminaires or lamps, thus ensuring vertical orientation of the light module. The exemplary embodiments may be applied in public places, hospitals, ward rooms, and other locations where a cost effective disinfection method is needed.Type: ApplicationFiled: October 14, 2011Publication date: April 18, 2013Inventors: Miklós Budai, László Balázs, István Deme
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Patent number: 7786661Abstract: Electron emissive compositions comprising a barium neodymium oxide are described. These compositions may be applied to electrodes such that electron emission is facilitated. Methods of manufacturing emissive electrodes comprising a barium neodymium oxide are also described. Various discharge lamps employing such electrodes are described as well.Type: GrantFiled: June 6, 2008Date of Patent: August 31, 2010Assignee: General Electric CompanyInventors: Istvan Deme, Anna Szucs, Zsolt Nemeth
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Patent number: 7737639Abstract: A fluorescent lamp includes a light-transmissive glass envelope having an inner surface, means for providing an electric discharge to the interior of the glass envelope, a phosphor layer within the interior of the glass envelope and a discharge-sustaining fill gas and a mercury dose sealed inside the light-transmissive glass envelope. The light-transmissive glass envelope can comprise a light-transmissive mixed alkali glass envelope and the phosphor layer can comprise a phosphor layer of approximately three mg/cm2. A barrier layer of approximately 0.3 mg/cm2 or less of alumina can be applied to the inner surface of the light-transmissive glass envelope. The mercury dose can be present in an amount to provide a saturated mercury vapor pressure within the light-transmissive glass envelope throughout substantially the entire life of the lamp. The lamp can have an end-of-life mercury consumption value of approximately 0.63 mg or less, including 0.Type: GrantFiled: March 13, 2008Date of Patent: June 15, 2010Assignee: General Electric CompanyInventors: Istvan Deme, Laszlo Balazs, Katalin Toth, Jon B. Jansma
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Publication number: 20090302765Abstract: Electron emissive compositions comprising a barium neodymium oxide are described. These compositions may be applied to electrodes such that electron emission is facilitated. Methods of manufacturing emissive electrodes comprising a barium neodymium oxide are also described. Various discharge lamps employing such electrodes are described as well.Type: ApplicationFiled: June 6, 2008Publication date: December 10, 2009Inventors: Istvan DEME, Anna SZUCS, Zsolt NEMETH
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Publication number: 20090230837Abstract: A fluorescent lamp includes a light-transmissive glass envelope having an inner surface, means for providing an electric discharge to the interior of the glass envelope, a phosphor layer within the interior of the glass envelope and a discharge-sustaining fill gas and a mercury dose sealed inside the light-transmissive glass envelope. The light-transmissive glass envelope can comprise a light-transmissive mixed alkali glass envelope and the phosphor layer can comprise a phosphor layer of approximately three mg/cm2. A barrier layer of approximately 0.3 mg/cm2 or less of alumina can be applied to the inner surface of the light-transmissive glass envelope. The mercury dose can be present in an amount to provide a saturated mercury vapor pressure within the light-transmissive glass envelope throughout substantially the entire life of the lamp. The lamp can have an end-of-life mercury consumption value of approximately 0.63 mg or less, including 0.Type: ApplicationFiled: March 13, 2008Publication date: September 17, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Istvan Deme, Laszlo Balazs, Katalin Toth, Jon B. Jansma
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Publication number: 20090079324Abstract: A fluorescent lamp includes a light-transmissive envelope, means for providing a discharge, a gas fill comprising mercury vapor and an inert gas sealed inside the envelope, a barrier layer on the inner surface of the envelope and a phosphor layer on the barrier layer. The phosphor layer contains at least one phosphor and alpha alumina and has a coating weight from about 1 to about 5 mg/cm2.Type: ApplicationFiled: September 20, 2007Publication date: March 26, 2009Inventors: Istvan Deme, Geza Szeghy, Gabriella Revesz
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Patent number: 7427829Abstract: A mercury vapor discharge fluorescent lamp having a barrier layer and a phosphor layer. The barrier layer comprises yttria-coated alumina particles. The barrier layer is preferably at least 11 weight percent yttria. Preferably the yttrium-coated alumina particles are provided in an aqueous suspension and are then substantially separated from the dissolved salts therein before being combined into a coating suspension for coating the lamp.Type: GrantFiled: October 25, 2005Date of Patent: September 23, 2008Assignee: General Electric CompanyInventors: Istvan Deme, Judit Szigeti, Gábor Sajó
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Publication number: 20070090765Abstract: A mercury vapor discharge fluorescent lamp having a barrier layer and a phosphor layer. The barrier layer comprises yttria-coated alumina particles. The barrier layer is preferably at least 11 weight percent yttria. Preferably the yttrium-coated alumina particles are provided in an aqueous suspension and are then substantially separated from the dissolved salts therein before being combined into a coating suspension for coating the lamp.Type: ApplicationFiled: October 25, 2005Publication date: April 26, 2007Inventors: Istvan Deme, Judit Szigeti, Gabor Sajo
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Patent number: 6369502Abstract: A low pressure mercury vapor discharge lamp is provided, said discharge lamp (10) comprising an envelope (12) formed from light-transmitting material and containing an ionizable gas fill (22), mercury, and electrodes (18) sealed in the envelope. The envelope (12) is provided with a single layer coating (14) on the internal surface thereof next to the discharge space. The coating (14) contains halo-phosphate phosphor and 5-30 mass % aluminum oxide relative to the halo-phosphate phosphor, and the primary particle size of the aluminum oxide is smaller than 30 nanometers, the floc size of the aluminum oxide is smaller than 1 micrometer, and the void fraction of the total floc volume is at least 50%.Type: GrantFiled: November 29, 1999Date of Patent: April 9, 2002Assignee: General Electric CompanyInventors: Zsuzsa Auber, László Balázs, István Deme, Gábor Sajó, Judit Szigeti
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Patent number: 4713078Abstract: The invention relates to a method for preserving raw hides, skins and furskins comprising treating the hides, skins and furskins with an aqueous solution containing at least 0.1% by mass of cyanamide and, if desired, one or more members of the group consisting of polyalcohols, fungicides, sodium chloride, buffer systems possessing buffer capacity in acidic media, salts capable of acidic hydrolysis, weak acids and surface active agents.The raw hides, skins and furskins can be stored without of appearance of any sign of deterioration for at least two weeks in humid ambient conditions.Type: GrantFiled: April 9, 1986Date of Patent: December 15, 1987Assignees: Bor-es Cipoipari Kutato-Fejleszto Vallalat, Budapesti Boripari VallalatInventors: Dezso David, Peter Rovo, Terez Sipos nee Richter, Gyorgy Molnar, Istvan Deme, Tamas Karnitscher