Patents by Inventor Anant Achyut Setlur
Anant Achyut Setlur 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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Publication number: 20140231857Abstract: A phosphor material is presented that includes a blend of a first phosphor, a second phosphor and a third phosphor. The first phosphor includes a composition having a general formula of RE2?yM1+yA2?yScySin-wGewO12+?:Ce3+ wherein RE is selected from a lanthanide ion or Y3+, where M is selected from Mg, Ca, Sr or Ba, A is selected from Mg or Zn and where 0?y?2, 2.5?n?3.5, 0?w?1, and ?1.5???1.5. The second phosphor includes a complex fluoride doped with manganese (Mn4+), and the third phosphor include a phosphor composition having an emission peak in a range from about 520 nanometers to about 680 nanometers. A lighting apparatus including such a phosphor material is also presented. The light apparatus includes a light source in addition to the phosphor material.Type: ApplicationFiled: September 20, 2012Publication date: August 21, 2014Applicant: GENERAL ELECTRIC COMPANYInventors: Prasanth Kumar Nammalwar, Digamber Gurudas Porob, Anant Achyut Setlur, Satya Kishore Manepalli
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Publication number: 20140116079Abstract: A method and system for storage of perishable items is provided. The system includes at least one enclosed compartment to store the perishable items. At least one of the walls of the enclosed compartment is detachable to allow movement of the perishable items in and out of the compartment. The system further includes a plurality of light emitting diodes (LEDs) that are disposed on one of the walls of the compartment. The LEDs include one or more blue LEDs that are coated with a layer of phosphor material. The LEDs are electrically coupled with a power source. The system further includes a control unit that is configured to control power supplied by the power source to the LEDs based on presence of the perishable items in the compartment.Type: ApplicationFiled: October 31, 2012Publication date: May 1, 2014Applicant: GENERAL ELECTRIC COMPANYInventors: James Edward Murphy, Anant Achyut Setlur
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Patent number: 8710487Abstract: A lighting apparatus capable of emitting white light includes a semiconductor light source; and a phosphor material radiationally coupled to the light source. The phosphor material includes a color-stable Mn+4 doped phosphor prepared by a process including providing a phosphor of formula I; Ax[MFy]:Mn+4??I and contacting the phosphor in particulate form with a saturated solution of a composition of formula II in aqueous hydrofluoric acid; Ax[MFy];??II wherein A is Li, Na, K, Rb, Cs, NR4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; x is the absolute value of the charge of the [MFy] ion; and y is 5, 6 or 7. In particular embodiments, M is Si, Ge, Sn, Ti, Zr, or a combination thereof.Type: GrantFiled: July 30, 2012Date of Patent: April 29, 2014Assignee: General Electric CompanyInventors: Robert Joseph Lyons, Anant Achyut Setlur, Anirudha Rajendra Deshpande, Ljudmil Slavchev Grigorov
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Patent number: 8703016Abstract: A phosphor material is presented that includes a blend of a first phosphor, a second phosphor and a third phosphor. The first phosphor includes a composition having a general formula of ((Sr1?zMz)1?(x+w)AwCex)3(Al1?ySiy)O4+y+3(x?w)F1?y?3(x?w), wherein 0<x?0.10, 0?y?0.5, 0?z?0.5, 0?w?x, A comprises Li, Na, K, or Rb; and M comprises Ca, Ba, Mg, Zn, or Sn. The second phosphor includes a complex fluoride doped with manganese (Mn4+), and the third phosphor include a phosphor composition having an emission peak in a range from about 520 nanometers to about 680 nanometers. A lighting apparatus including such a phosphor material is also presented. The light apparatus includes a light source in addition to the phosphor material.Type: GrantFiled: June 28, 2011Date of Patent: April 22, 2014Assignee: General Electric CompanyInventors: Prasanth Kumar Nammalwar, Anant Achyut Setlur, Digamber Gurudas Porob, Satya Kishore Manepalli
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Patent number: 8593062Abstract: An LED lamp includes a light source configured to emit radiation with a peak intensity at a wavelength between about 250 nm and about 550 nm; and a phosphor composition configured to be radiationally coupled to the light source. The phosphor composition includes particles of a phosphor of formula I, said particles having a coating composition disposed on surfaces thereof; ((Sr1-zMz)1-(x+w)AwCex)3(Al1-ySiy)O4+y+3(x?w)F1-y-3(x?w)??I wherein the coating composition comprises a material selected from aluminum oxide, magnesium oxide, calcium oxide, barium oxide, strontium oxide, zinc oxide, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, barium hydroxide, strontium hydroxide, zinc hydroxide, aluminum phosphate, magnesium phosphate, calcium phosphate, barium phosphate, strontium phosphate, and combinations thereof; and A is Li, Na, K, or Rb, or a combination thereof; M is Ca, Ba, Mg, Zn, or a combination thereof; and 0<x?0.10, 0?y?0.5, 0?z?0.5, 0?x?x.Type: GrantFiled: April 5, 2011Date of Patent: November 26, 2013Assignee: General Electric CompanyInventors: James Edward Murphy, Anant Achyut Setlur, Samuel Joseph Camardello
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Publication number: 20130270482Abstract: A detector for detecting high-energy radiation is disclosed. The detector includes scintillating material with a garnet structure includes gadolinium, yttrium, cerium, gallium, and aluminum. The scintillating material is expressed as (Gd1?x?y?zYxAyCez)3+u(Ga1?m?nAlmDn)5?uO12:wFO, wherein A is lutetium, lanthanum, terbium, dysprosium, or a combination thereof; D is indium, scandium, or a combination thereof; F is a divalent ion; 0?x<0.2, 0<y<0.5, 0.001<z<0.05, 0<u<0.1, 0?n<0.2, 0.3<m<0.6, and 10 ppm?w?300 ppm; and y/x>1.Type: ApplicationFiled: April 17, 2012Publication date: October 17, 2013Inventors: Haochuan Jiang, Anant Achyut Setlur, Robert Joseph Lyons, Kevin Alan David, James Edward Murphy
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Patent number: 8545723Abstract: A persistent phosphor of formula I is provided, along with methods for making and using the phosphor: AxAlyO4:Euj, REk, Bm, Znn, Coo, Scp ??I wherein: A is Ba, Sr, Ca, or a combination of these metals; x is greater than about 0.75 and less than about 1.3; y is greater than or equal to about 1.6 and less than or equal to 2; j is greater than about 0.0005 and less than about 0.1; k is greater than about 0.0005 and less than about 0.1; m is greater than or equal to 0 and less than about 0.30; n is greater than 0 and less than about 0.10; o is greater than 0 and less than about 0.01; p is greater than 0 and less than about 0.05; and RE is Dy, Nd, or a combination thereof. Applications for such phosphors include use in toys, emergency equipment, clothing, and instrument panels, among others.Type: GrantFiled: March 30, 2011Date of Patent: October 1, 2013Assignee: General Electric CompanyInventors: Holly Ann Comanzo, Alok Mani Srivastava, William Winder Beers, Sergio Martins Loureiro, Anant Achyut Setlur, Stanley John Stoklosa, Claire Susan Henderson
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Patent number: 8419974Abstract: Disclosed here are methods for the preparation of optionally activated nanocrystalline rare earth phosphates. The optionally activated nanocrystalline rare earth phosphates may be used as one or more of quantum-splitting phosphor, visible-light emitting phosphor, vacuum-UV absorbing phosphor, and UV-emitting phosphor. Also disclosed herein are discharge lamps comprising the optionally activated nanocrystalline rare earth phosphates provided by these methods.Type: GrantFiled: December 11, 2008Date of Patent: April 16, 2013Assignee: General Electric CompanyInventors: Holly Ann Comanzo, Mohan Manoharan, Sergio Paulo Martins Loureiro, Anant Achyut Setlur, Alok Mani Srivastava
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Patent number: 8329060Abstract: Embodiments of the present techniques provide a related family of phosphors that may be used in lighting systems to generate blue or blue-green light. The phosphors include systems having a general formula of: ((Sr1?zMz)1?(x+w)AwCex)3(Al1?ySiy)O4+y+3(x?w)F1?y?3(x?w) (I), wherein 0<x?0.10, 0?y?0.5, 0?z?0.5, 0?w?x, A is Li, Na, K, Rb, or Ag or any combinations thereof, and M is Ca, Ba, Mg, Zn, or Sn or any combinations thereof. Advantageously, phosphors made accordingly to these formulations maintain emission intensity across a wide range of temperatures. The phosphors may be used in lighting systems, such as LEDs and fluorescent tubes, among others, to produce blue and blue/green light. Further, the phosphors may be used in blends with other phosphors, or in combined lighting systems, to produce white light suitable for illumination.Type: GrantFiled: October 22, 2008Date of Patent: December 11, 2012Assignee: General Electric CompanyInventors: Anant Achyut Setlur, Ramachandran Gopi Chandran, Claire Susan Henderson, Pransanth Kumar Nammalwar, Emil Radkov
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Patent number: 8324640Abstract: An edge lit illumination system is directed to providing backlighting utilizing a luminescent impregnated lightguide. The apparatus includes an LED radiation source providing a first radiation and a lightguide optically coupled to the LED radiation source including a luminescent material embedded or coated on an output surface of the lightguide designed to absorb the first radiation, and emit one or more radiations. The illumination system may further include additional optical components such as reflective layers, for directing radiation striking the back surfaces of the light guide back into the lightguide, as well as diffusion layers, UV reflectors, and polarizers.Type: GrantFiled: July 2, 2004Date of Patent: December 4, 2012Assignee: GE Lighting Solutions, LLCInventors: Cherian Jacob, Chen-Lun Hsing Chen, Emil Radkov, Alok Mani Srivastava, Anant Achyut Setlur, Holly Ann Comanzo, Joseph Shiang
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Publication number: 20120299466Abstract: A lighting apparatus capable of emitting white light includes a semiconductor light source; and a phosphor material radiationally coupled to the light source. The phosphor material includes a color-stable Mn+4 doped phosphor prepared by a process including providing a phosphor of formula I; Ax[MFy]:Mn+4??I and contacting the phosphor in particulate form with a saturated solution of a composition of formula II in aqueous hydrofluoric acid; Ax[MFy];??II wherein A is Li, Na, K, Rb, Cs, NR4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; x is the absolute value of the charge of the [MFy] ion; and y is 5, 6 or 7. In particular embodiments, M is Si, Ge, Sn, Ti, Zr, or a combination thereof.Type: ApplicationFiled: July 30, 2012Publication date: November 29, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Robert Joseph Lyons, Anant Achyut Setlur, Anirudha Rajendra Deshpande, Ljudmil Slavchev Grigorov
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Patent number: 8308982Abstract: Compounds, phosphor materials and apparatus related to nacaphite family of materials are presented. Potassium and rubidium based nacaphite family compounds and phosphors designed by doping divalent rare earth elements in the sites of alkaline earth metals in the nacaphite material families are descried. An apparatus comprising the phosphors based on the nacaphite family materials are presented herein. The compounds presented is of formula A2B1-yRyPO4X where the elements A, B, R, X and suffix y are defined such that A is potassium, rubidium, or a combination of potassium and rubidium and B is calcium, strontium, barium, or a combination of any of calcium, strontium and barium. X is fluorine, chlorine, or a combination of fluorine and chlorine, R is europium, samarium, ytterbium, or a combination of any of europium, samarium, and ytterbium, and y ranges from 0 to about 0.1.Type: GrantFiled: August 31, 2010Date of Patent: November 13, 2012Assignee: General Electric CompanyInventors: Robert Joseph Lyons, Anant Achyut Setlur, Robert John Cleaver
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Patent number: 8252613Abstract: A process for preparing color stable Mn+4 doped phosphors includes providing a phosphor of formula I; Ax[MFy]:Mn+4??I and contacting the phosphor in particulate form with a saturated solution of a composition of formula II in aqueous hydrofluoric acid; Ax[MFy];??II wherein A is Li, Na, K, Rb, Cs, NR4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; x is the absolute value of the charge of the [MFy] ion; and y is 5, 6 or 7. In particular embodiments, M is Si, Ge, Sn, Ti, Zr, or a combination thereof. A lighting apparatus capable of emitting white light includes a semiconductor light source; and a phosphor composition radiationally coupled to the light source, and which includes a color stable Mn+4 doped phosphor.Type: GrantFiled: March 23, 2011Date of Patent: August 28, 2012Assignee: General Electric CompanyInventors: Robert Joseph Lyons, Anant Achyut Setlur, Anirudha Rajendra Deshpande, Ljudmil Slavchev Grigorov
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Publication number: 20120049116Abstract: Compounds, phosphor materials and apparatus related to nacaphite family of materials are presented. Potassium and rubidium based nacaphite family compounds and phosphors designed by doping divalent rare earth elements in the sites of alkaline earth metals in the nacaphite material families are descried. An apparatus comprising the phosphors based on the nacaphite family materials are presented herein. The compounds presented is of formula A2B1-yRyPO4X where the elements A, B, R, X and suffix y are defined such that A is potassium, rubidium, or a combination of potassium and rubidium and B is calcium, strontium, barium, or a combination of any of calcium, strontium and barium. X is fluorine, chlorine, or a combination of fluorine and chlorine, R is europium, samarium, ytterbium, or a combination of any of europium, samarium, and ytterbium, and y ranges from 0 to about 0.1.Type: ApplicationFiled: August 31, 2010Publication date: March 1, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Robert Joseph Lyons, Anant Achyut Setlur, Robert John Cleaver
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Publication number: 20120019126Abstract: An oxynitride phosphor is presented. The oxynitride phosphor has a formula: ApBqOrNs: R such that A is barium or a combination of barium with at least one of Li, Na, K, Y, Sc, Be, Mg, Ca, Sr, Ba, Zn, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, and Lu; B is silicon or a combination of silicon with at least one of Al, B, Ga, and Ge; R is europium or a combination of europium with at least one of Ce, Pr, Sm, Nd, Tb, Dy, Yb, Tm, Er, Ho, and Mn. p, q, r, s are numbers such that p is greater than about 2 and less than about 6, q is greater than about 8 and less than about 10, r is greater than about 0.1 and less than about 6, and s is greater than about 10 and less than about 15. The method of preparing the oxynitride phosphors and light emitting apparatus including the oxynitride phosphors are included.Type: ApplicationFiled: July 22, 2010Publication date: January 26, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Digamber Gurudas Porob, Anant Achyut Setlur, Prasanth Kumar Nammalwar, Shyamala Halady Subraya Bhat, Satya Kishore Manepalli, Dan Hancu
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Publication number: 20110279011Abstract: An LED lamp includes a light source configured to emit radiation with a peak intensity at a wavelength between about 250 nm and about 550 nm; and a phosphor composition configured to be radiationally coupled to the light source. The phosphor composition includes particles of a phosphor of formula I, said particles having a coating composition disposed on surfaces thereof; ((Sr1?zMz)1?(x+w)AwCex)3(Al1?ySiy)O4+y+3(x?w)F1?y?3(x?w)??I wherein the coating composition comprises a material selected from aluminum oxide, magnesium oxide, calcium oxide, barium oxide, strontium oxide, zinc oxide, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, barium hydroxide, strontium hydroxide, zinc hydroxide, aluminum phosphate, magnesium phosphate, calcium phosphate, barium phosphate, strontium phosphate, and combinations thereof; and A is Li, Na, K, or Rb, or a combination thereof; M is Ca, Ba, Mg, Zn, or a combination thereof; and 0<x?0.10, 0?y?0.5, 0?z?0.5, 0?x?x.Type: ApplicationFiled: April 5, 2011Publication date: November 17, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: James Edward Murphy, Anant Achyut Setlur, Samuel Joseph Camardello
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Patent number: 8057706Abstract: A phosphor material contains encapsulated particles of manganese (Mn4+) doped fluoride phosphor. A method of encapsulating such particles is also provided. Each particle is encapsulated with a layer of a manganese-free fluoride phosphor. The use of such a phosphor material in a lighting apparatus results in improved stability and acceptable lumen maintenance over the course of the apparatus life.Type: GrantFiled: July 27, 2010Date of Patent: November 15, 2011Assignee: General Electric CompanyInventors: Anant Achyut Setlur, Oltea Puica Siclovan, Robert Joseph Lyons, Ljudmil Slavchev Grigorov
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Publication number: 20110255265Abstract: A phosphor material is presented that includes a blend of a first phosphor, a second phosphor and a third phosphor. The first phosphor includes a composition having a general formula of ((Sr1?zMz)1?(x+w)AwCex)3(Al1?ySiy)O4+y+3(x?w)F1?y?3(x?w), wherein 0<x?0.10, 0?y?0.5, 0?z?0.5, 0?w?x, A comprises Li, Na, K, or Rb; and M comprises Ca, Ba, Mg, Zn, or Sn. The second phosphor includes a complex fluoride doped with manganese (Mn4+), and the third phosphor include a phosphor composition having an emission peak in a range from about 520 nanometers to about 680 nanometers. A lighting apparatus including such a phosphor material is also presented. The light apparatus includes a light source in addition to the phosphor material.Type: ApplicationFiled: June 28, 2011Publication date: October 20, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Prasanth Kumar Nammalwar, Anant Achyut Setlur, Digamber Gurudas Porob, Satya Kishore Manepalli
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Patent number: 8003012Abstract: The current invention provides a persistent phosphor blend, along with techniques for making and using the blend. The persistent phosphor blend is made of at least one persistent phosphor combined with at least one other phosphor, where the excitation spectra of the one or more other phosphors overlap the emission spectra of the one or more persistent phosphors. The choice of the phosphors used allows the decay time and emission colors to be tuned for the specific application. In another embodiment, the invention provides a method for making persistent phosphor blends with tunable colors. In yet another embodiment, applications for such a persistent phosphor blend are provided.Type: GrantFiled: March 28, 2008Date of Patent: August 23, 2011Assignee: General Electric CompanyInventors: Holly Ann Comanzo, Alok Mani Srivastava, William Winder Beers, Anant Achyut Setlur, Claire Susan Henderson
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Publication number: 20110175029Abstract: A persistent phosphor of formula I is provided, along with methods for making and using the phosphor: AxAlyO4:Euj,REk,Bm,Znn,Coo,Scp ??I wherein: A is Ba, Sr, Ca, or a combination of these metals; x is greater than about 0.75 and less than about 1.3; y is greater than or equal to about 1.6 and less than or equal to 2; j is greater than about 0.0005 and less than about 0.1; k is greater than about 0.0005 and less than about 0.1; m is greater than or equal to 0 and less than about 0.30; n is greater than 0 and less than about 0.10; o is greater than 0 and less than about 0.01; p is greater than 0 and less than about 0.05; and RE is Dy, Nd, or a combination thereof. Applications for such phosphors include use in toys, emergency equipment, clothing, and instrument panels, among others.Type: ApplicationFiled: March 30, 2011Publication date: July 21, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Holly Ann Comanzo, Alok Mani Srivastava, William Winder Beers, Sergio Martins Loureiro, Anant Achyut Setlur, Stanley John Stoklosa, Claire Susan Henderson