Patents by Inventor Sujeet Kumar
Sujeet Kumar 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: 7214446Abstract: Batteries based on nanoparticles are demonstrated that achieve high energy densities. Vanadium oxide nanoparticles can have several different stoichiometries and corresponding crystal lattices. The nanoparticles preferably have average diameters less than about 500 nm and more preferably less than about 150 nm. Cathodes produced using the vanadium oxide nanoparticles and a binder can be used to construct lithium batteries or lithium ion batteries. The nanoparticles may have energy densities greater than about 900 Wh/kg.Type: GrantFiled: June 29, 2000Date of Patent: May 8, 2007Assignee: NanoGram CorporationInventors: Xiangxin Bi, Nobuyuki Kambe, Sujeet Kumar, James T. Gardner
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Patent number: 7112449Abstract: Combinatorial synthesis methods obtain a plurality of compositions having materially different characteristics using an apparatus having a plurality of collectors. A first quantity of fluid reactants are reacted to form a first quantity of product composition. Following completion of the collection of the first quantity of product composition, a second quantity of fluid reactants are reacted to form a second quantity of product composition, the second quantity of product composition being material different from the first quantity of product composition. An apparatus includes a nozzle connected to a reactant source and a plurality of collectors. The nozzle and plurality of collectors move relative to each other such that a collector can be selectively placed to receive a fluid stream emanating from the nozzle. The plurality of product compositions can be evaluated to determine their suitability for various applications.Type: GrantFiled: April 25, 2000Date of Patent: September 26, 2006Assignee: NanoGram CorporationInventors: Xiangxin Bi, Sujeet Kumar, Craig R. Horne, Ronald J. Mosso, James T. Gardner, Shivkumar Chiruvolo, Seung M. Lim
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Patent number: 7101520Abstract: Methods for producing metal/metalloid oxide particles comprise rare earth metals herein include reacting a reactant stream in a gas flow. The reactant stream includes a rare earth metal precursor and an oxygen source. A collection of particles comprising metal/metalloid oxide have an average particle size from about 15 nm to about 1 micron. The metal/metalloid oxide comprises a non-rare earth metal oxide wherein less than about 25 percent of a non-rare earth metal is substituted with a rare earth metal. The metal/metalloid oxide particles can be reacted with H2S or C2S to form corresponding metal/metalloid sulfide particles. The metal/metalloid sulfide particles can be doped with rare earth metals. The particles are useful as phosphors, for example for use in displays.Type: GrantFiled: February 4, 2004Date of Patent: September 5, 2006Assignee: NanoGram CorporationInventor: Sujeet Kumar
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Publication number: 20060147369Abstract: Methods are described that have the capability of producing submicron/nanoscale particles, in some embodiments dispersible, at high production rates. In some embodiments, the methods result in the production of particles with an average diameter less than about 75 nanometers that are produced at a rate of at least about 35 grams per hour. In other embodiments, the particles are highly uniform. These methods can be used to form particle collections and/or powder coatings. Powder coatings and corresponding methods are described based on the deposition of highly uniform submicron/nanoscale particles.Type: ApplicationFiled: February 17, 2006Publication date: July 6, 2006Inventors: Xiangxin Bi, Nobuyuki Kambe, Craig Horne, James Gardner, Ronald Mosso, Shivkumar Chiruvolu, Sujeet Kumar, William McGovern, Pierre DeMascarel, Robert Lynch
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Patent number: 7029513Abstract: An aerosol delivery apparatus is used to deliver an aerosol into a reaction chamber for chemical reaction to produce reaction products such as nanoparticles. A variety of improved aerosol delivery approaches provide for the production of more uniform reaction products. In preferred embodiments, a reaction chamber is used that has a cross section perpendicular to the flow of reactant having a dimension along a major axis greater than a dimension along a minor axis. The aerosol preferably is elongated along the major axis of the reaction chamber.Type: GrantFiled: January 17, 2003Date of Patent: April 18, 2006Assignee: NanoGram CorporationInventors: James T. Gardner, Sujeet Kumar, Ronald M. Cornell, Ronald J. Mosso, Xiangxin Bi
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Publication number: 20050264811Abstract: Three dimensional optical structures are described that can have various integrations between optical devices within and between layers of the optical structure. Optical turning elements can provide optical pathways between layers of optical devices. Methods are described that provide for great versatility on contouring optical materials throughout the optical structure. Various new optical devices are enabled by the improved optical processing approaches.Type: ApplicationFiled: July 28, 2005Publication date: December 1, 2005Inventors: Xiangxin Bi, Elizabeth Nevis, Ronald Mosso, Michael Chapin, Shivkumar Chiruvolu, Sardar Khan, Sujeet Kumar, Herman Lopez, Nguyen Huy, Craig Horne, Michael Bryan, Eric Euvrard
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Patent number: 6952504Abstract: Three dimensional optical structures are described that can have various integrations between optical devices within and between layers of the optical structure. Optical turning elements can provide optical pathways between layers of optical devices. Methods are described that provide for great versatility on contouring optical materials throughout the optical structure. Various new optical devices are enabled by the improved optical processing approaches.Type: GrantFiled: December 21, 2001Date of Patent: October 4, 2005Assignee: NeoPhotonics CorporationInventors: Xiangxin Bi, Elizabeth Anne Nevis, Ronald J. Mosso, Michael Edward Chapin, Shivkumar Chiruvolu, Sardar Hyat Khan, Sujeet Kumar, Herman Adrian Lopez, Nguyen Tran The Huy, Craig Richard Horne, Michael A. Bryan, Eric Euvrard
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Publication number: 20050200036Abstract: Improvements to chemical reaction systems provide for the production of commercial quantities of chemical products, such as chemical powders. The improved chemical reaction systems can accommodate a large reactant flux for the production of significant amounts of product. Preferred reaction systems are based on laser pyrolysis. Features of the system provide for the production of highly uniform product particles.Type: ApplicationFiled: May 3, 2005Publication date: September 15, 2005Inventors: Ronald Mosso, Xiangxin Bi, James Gardner, Sujeet Kumar, Samuel Phillip
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Publication number: 20050170192Abstract: Inorganic particle/polymer composites are described that involve chemical bonding between the elements of the composite. In some embodiments, the composite composition includes a polymer having side groups chemically bonded to inorganic particles. Furthermore, the composite composition can include chemically bonded inorganic particles and ordered copolymers. Various electrical optical and electro-optical devices can be formed from the composites.Type: ApplicationFiled: April 4, 2005Publication date: August 4, 2005Inventors: Nobuyuki Kambe, Yigal Blum, Benjamin Chaloner-Gill, Shivkumar Chiruvolua, Sujeet Kumar, David McQueen
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Publication number: 20050158690Abstract: Combinatorial synthesis methods obtain a plurality of compositions having materially different characteristics using an apparatus having a plurality of collectors. A first quantity of fluid reactants are reacted to form a first quantity of product composition. Following completion of the collection of the first quantity of product composition, a second quantity of fluid reactants are reacted to form a second quantity of product composition, the second quantity of product composition being material different from the first quantity of product composition. An apparatus includes a nozzle connected to a reactant source and a plurality of collectors. The nozzle and plurality of collectors move relative to each other such that a collector can be selectively placed to receive a fluid stream emanating from the nozzle. The plurality of product compositions can be evaluated to determine their suitability for various applications.Type: ApplicationFiled: December 14, 2004Publication date: July 21, 2005Inventors: Xiangxin Bi, Sujeet Kumar, Craig Horne, Ronald Mosso, James Gardner, Shivkumar Chiruvolo, Seung Lim
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Publication number: 20050132659Abstract: A collection of nanoparticles of aluminum oxide have been produced by laser pyrolysis have a very narrow distribution of particle diameters. Preferably, the distribution of particle diameters effectively does not have a tail such that almost no particles have a diameter greater than about 4 times the average diameter. The pyrolysis preferably is performed by generating a molecular stream containing an aluminum precursor, an oxidizing agent and an infrared absorber. The pyrolysis can be performed with an infrared laser such as a CO2 laser.Type: ApplicationFiled: January 28, 2005Publication date: June 23, 2005Inventors: Sujeet Kumar, Hariklia Reitz, Xiangxin Bi, Nobuyuki Kambe
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Publication number: 20050118411Abstract: Nanoscale particles, particle coatings/particle arrays and corresponding consolidated materials are described based on an ability to vary the composition involving a wide range of metal and/or metalloid elements and corresponding compositions. In particular, metalloid oxides and metal-metalloid compositions are described in the form of improved nanoscale particles and coatings formed from the nanoscale particles. Compositions comprising rare earth metals and dopants/additives with rare earth metals are described. Complex compositions with a range of host compositions and dopants/additives can be formed using the approaches described herein. The particle coating can take the form of particle arrays that range from collections of disbursable primary particles to fused networks of primary particles forming channels that reflect the nanoscale of the primary particles. Suitable materials for optical applications are described along with some optical devices of interest.Type: ApplicationFiled: October 29, 2004Publication date: June 2, 2005Inventors: Craig Horne, Pierre DeMascarel, Christian Honeker, Benjamin Chaloner-Gill, Herman Lopez, Xiangxin Bi, Ronald Mosso, William McGovern, James Gardner, Sujeet Kumar, James Gilliam, Vince Pham, Eric Euvrard, Shivkumar Chinuvolu, Jesse Jur
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Patent number: 6881490Abstract: Inorganic particle/polymer composites are described that involve chemical bonding between the elements of the composite. In some embodiments, the composite composition includes a polymer having side groups chemically bonded to inorganic particles. Furthermore, the composite composition can include chemically bonded inorganic particles and ordered copolymers. Various electrical, optical and electro-optical devices can be formed from the composites.Type: GrantFiled: April 24, 2003Date of Patent: April 19, 2005Assignee: NanoGram CorporationInventors: Nobuyuki Kambe, Yigal Dov Blum, Benjamin Chaloner-Gill, Shivkumar Chiruvolu, Sujeet Kumar, David Brent MacQueen
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Patent number: 6849334Abstract: Nanoscale particles, particle coatings/particle arrays and corresponding consolidated materials are described based on an ability to vary the composition involving a wide range of metal and/or metalloid elements and corresponding compositions. In particular, metalloid oxides and metal-metalloid compositions are described in the form of improved nanoscale particles and coatings formed from the nanoscale particles. Compositions comprising rare earth metals and dopants/additives with rare earth metals are described. Complex compositions with a range of host compositions and dopants/additives can be formed using the approaches described herein. The particle coating can take the form of particle arrays that range from collections of disbursable primary particles to fused networks of primary particles forming channels that reflect the nanoscale of the primary particles. Suitable materials for optical applications are described along with some optical devices of interest.Type: GrantFiled: March 15, 2002Date of Patent: February 1, 2005Assignee: NeoPhotonics CorporationInventors: Craig R. Horne, Pierre J. DeMascarel, Christian C. Honeker, Benjamin Chaloner-Gill, Herman A. Lopez, Xiangxin Bi, Ronald J. Mosso, William E. McGovern, James T. Gardner, Sujeet Kumar, James A. Gilliam, Vince Pham, Eric Euvrard, Shivkumar Chiruvolu, Jesse Jur
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Publication number: 20040197659Abstract: Lithium metal oxide particles have been produced having average diameters less than about 100 nm. Composite metal oxides of particular interest include, for example, lithium cobalt oxide, lithium nickel oxide, lithium titanium oxides and derivatives thereof. These nanoparticles composite metal oxides can be used as electroactive particles in lithium or lithium ion batteries. Batteries of particular interest include lithium titanium oxide in the negative electrode and lithium cobalt manganese oxide in the positive electrode.Type: ApplicationFiled: April 19, 2004Publication date: October 7, 2004Applicant: NanoGram CorporationInventors: Sujeet Kumar, Craig R. Horne
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Publication number: 20040173780Abstract: Methods for producing metal/metalloid oxide particles comprise rare earth metals herein include reacting a reactant stream in a gas flow. The reactant stream includes a rare earth metal precursor and an oxygen source. A collection of particles comprising metal/metalloid oxide have an average particle size from about 15 nm to about 1 micron. The metal/metalloid oxide comprises a non-rare earth metal oxide wherein less than about 25 percent of a non-rare earth metal is substituted with a rare earth metal. The particles are useful as phosphors, for example for use in displays.Type: ApplicationFiled: February 4, 2004Publication date: September 9, 2004Applicant: NanoGram CorporationInventor: Sujeet Kumar
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Publication number: 20040120882Abstract: Collections of particles comprising multiple a metal oxide can be formed with average particle sizes less than about 500 nm. In some embodiments, the particle collections have particle size distributions such that at least about 95 percent of the particles have a diameter greater than about 40 percent of the average diameter and less than about 160 percent of the average diameter. Also, in further embodiments, the particle collections have particle size distribution such that effectively no particles have a diameter greater than about four times the average diameter of the collection of particles.Type: ApplicationFiled: September 4, 2003Publication date: June 24, 2004Inventors: Sujeet Kumar, Hariklia Dris Reitz, Craig R. Horne, James T. Gardner, Ronald J. Mosso, Xiangxin Bi
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Patent number: 6749648Abstract: Lithium metal oxide particles have been produced having average diameters less than about 100 nm. Composite metal oxides of particular interest include, for example, lithium cobalt oxide, lithium nickel oxide, lithium titanium oxides and derivatives thereof. These nanoparticles composite metal oxides can be used as electroactive particles in lithium or lithium ion batteries. Batteries of particular interest include lithium titanium oxide in the negative electrode and lithium cobalt manganese oxide in the positive electrode.Type: GrantFiled: June 19, 2000Date of Patent: June 15, 2004Assignee: NanaGram CorporationInventors: Sujeet Kumar, Craig R. Horne
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Patent number: 6749966Abstract: Laser pyrolysis can be used to produce directly metal vanadium oxide composite nanoparticles. To perform the pyrolysis a reactant stream is formed including a vanadium precursor and a second metal precursor. The pyrolysis is driven by energy absorbed from a light beam. Metal vanadium oxide nanoparticles can be incorporated into a cathode of a lithium based battery to obtain increased energy densities. Implantable defibrillators can be constructed with lithium based batteries having increased energy densities.Type: GrantFiled: April 1, 2002Date of Patent: June 15, 2004Assignee: NanoGram Devices CorporationInventors: Hariklia Dris Reitz, James P. Buckley, Sujeet Kumar, Yu K. Fortunak, Xiangxin Bi
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Patent number: 6726990Abstract: A collection of silicon oxide nanoparticles have an average diameter from about 5 nm to about 100 nm. The collection of silicon oxide nanoparticles effectively include no particles with a diameter greater than about four times the average diameter. The particles generally have a spherical morphology. Methods for producing the nanoparticles involve laser pyrolysis. The silicon oxide nanoparticles are effective for the production of improved polishing compositions including compositions useful for chemical-mechanical polishing.Type: GrantFiled: May 27, 1998Date of Patent: April 27, 2004Assignee: NanoGram CorporationInventors: Sujeet Kumar, Xiangxin Bi, Nobuyuki Kambe