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Inventor:
Venkataramani; Venkat Subramaniam
Address:
Clifton Park, NY
No. of patents:
50
Patents:












Patent Number Title Of Patent Date Issued
8189633 Polycrystalline transparent ceramic articles and method of making same May 29, 2012
A polycrystalline transparent ceramic article including lutetium is presented. The article includes an oxide with a formula of ABO.sub.3, having type A lattice sites and type B lattice sites. The lattice site A may further comprise a plurality of elements, in addition to lutetium. Ty
8033320 High emittance shell molds for directional casting October 11, 2011
Shell molds and processes for making the shell molds that exhibit high emissivity in the red and infrared regions. In this manner, thermal resistance within a gap formed between solidifying cast metal and the interior mold surface is decreased. In one embodiment, the facecoat region
7989530 Nonlinear polymer composites and methods of making the same August 2, 2011
A nonlinear composition comprises a polymeric material and at least one ferroelectric, antiferroelectric, or paraelectric particle, wherein the composition has a permittivity greater than or equal to about 5. A method of making a nonlinear composition comprises combining a polymeric
7978402 Robust window for infrared energy July 12, 2011
Articles transparent to infrared radiation and resistant to impact and wear are provided. The article comprises a substrate and a composite coating disposed over the substrate and extending from an interface with the substrate to an external surface. The composite coating comprises a
7964294 Low surface energy coatings for cooking products June 21, 2011
An easy to clean and stain resistant coating for a cooking product includes an oxycarbofluoride coating. The oxycarbofluoride coating has a composition comprising at least one metal oxide, carbon and fluorine and can be applied to a substrate using a sol-gel process.
7879284 Method for making sintered cubic halide scintillator material February 1, 2011
A method of making a cubic halide scintillator material includes pressing a powder mixture of cubic halide and at least one activator under conditions of pressure, temperature, residence time and particle size effective to provide a polycrystalline sintered cubic halide scintillator
7854222 Pyrocatalytic coatings for heating devices December 21, 2010
Heating devices such as self-cleaning ovens include at least one surface comprising metal oxide crystalline catalytic material disposed thereon. The metal oxide crystalline material includes perovskite and perovskite-like materials, pyrochlores, rare earth metal oxides, spinels, and
7800073 Moldable neutron sensitive compositions, articles, and methods September 21, 2010
Moldable neutron sensitive compositions containing an inorganic scintillating component, and neutron capture component, and a moldable resin component, are described. They are prepared with optimized compositions for maximized thermal neutron sensitivity. Methods for preparing such c
7728499 Thermal management of high intensity discharge lamps, coatings and methods June 1, 2010
Ceramic HID lamps with improved thermal management having an adherent infrared reflective coating layer located on the outer surface of the vessel are described. They include a coating of a nonmetallic material proximate the first and second end portions of the vessel. Such coatings
7711022 Polycrystalline transparent ceramic articles and method of making same May 4, 2010
A polycrystalline transparent ceramic article including lutetium is presented. The article includes an oxide with a formula of ABO.sub.3, having type A lattice sites and type B lattice sites. The lattice site A may further comprise a plurality of elements, in addition to lutetium. Ty
7708968 Nano-scale metal oxide, oxyhalide and oxysulfide scintillation materials and methods for making May 4, 2010
Crystalline scintillator materials comprising nano-scale particles of metal oxides, metal oxyhalides and metal oxysulfides are provided. The nano-scale particles are less than 100 nm in size. Methods are provided for preparing the particles. In one method, used to form oxyhalides and
7700003 Composition, article, and method April 20, 2010
A method is provided that includes heating a powder to a temperature that is below the melting point of the scintillator composition but is sufficiently high to form a coherent mass. The powder includes a scintillator composition. The coherent mass is polycrystalline and has a pulse
7625502 Nano-scale metal halide scintillation materials and methods for making same December 1, 2009
Crystalline scintillator materials comprising nano-scale particles of metal halides are provided. The nano-scale particles are less than 100 nm in size. Methods are provided for preparing the particles. In these methods, ionic liquids are used in place of water to allow precipitation
7608829 Polymeric composite scintillators and method for making same October 27, 2009
A scintillation detector comprising nano-scale particles of a scintillation compound embedded in a plastic matrix is provided. The nano-scale particles may be made from metal oxides, metal oxyhalides, metal oxysulfides, or metal halides. Methods are provided for preparing the nano-sc
7572392 Scintillating compositions for detecting neutrons and methods of making the same August 11, 2009
Solid-state scintillating compositions for detecting neutrons comprise a Li.sub.4Zn(PO.sub.4).sub.2 host lattice. Methods of making scintillating compositions comprise: dissolving a lithium-6 precursor and a zinc precursor in a solvent to form a solution; combining phosphoric acid with
7569109 Single crystal scintillator materials and methods for making the same August 4, 2009
A method of making a rare earth halide single crystal material is provided. The method includes providing a polycrystalline material having a plurality of grains. The method further includes adding a seed crystal to the polycrystalline material to define a plane of growth for the pol
7560046 Scintillator material and radiation detectors containing same July 14, 2009
A sintered, annealed scintillator composition, which, prior to annealing, has a formula of A.sub.3B.sub.2C.sub.3O.sub.12, where A is at least one member of the group consisting of Tb, Ce, and Lu, or combinations thereof, B is an octahedral site (Al), and C is a tetrahedral site (also
7527742 Etchant, method of etching, laminate formed thereby, and device May 5, 2009
An etchant including a halogenated salt, such as Cryolite (Na.sub.3AlF.sub.6) or potassium tetrafluoro borate (KBF.sub.4), is provided. The salt may be present in the etchant in an amount sufficient to etch a substrate and may have a melt temperature of greater than about 200 degrees
7520931 Single crystal scintillator materials and methods for making the same April 21, 2009
A method of making a single crystal material is provided. The method includes providing a polycrystalline material having a plurality of grains. The method further includes adding a seed crystal to the polycrystalline material to define a plane of growth for the polycrystalline mater
7494688 Methods for making doped magnesium diboride powders February 24, 2009
A method for making a doped magnesium diboride powder is provided. The method includes coating a polymeric precursor on at least one of a plurality of particles of a first phase, where the first phase includes a magnesium diboride powder, where the polymeric precursor includes chemic
7351482 Ceramic compositions for thermal barrier coatings stabilized in the cubic crystalline phase April 1, 2008
Zirconia-containing ceramic compositions that are capable of providing thermal barrier coatings wherein the zirconia is stabilized in the cubic crystalline phase. These compositions comprise at least about 50 mole % zirconia and a stabilizing amount up to about 49 mole % of a stabilizer
7329875 Detector array for imaging system and method of making same February 12, 2008
A method of manufacturing a detector array for an imaging system, the method comprising providing a pixelated scintillator having a plurality of lost molded pixels comprising a scintillator material adapted to detect radiation.
7310405 High-Z cast reflector compositions and method of manufacture December 18, 2007
A scintillator pack comprises an array of scintillator pixels and an x-ray absorbing layer disposed in inter-scintillator regions between the scintillator pixels. The x-ray absorbing layer acts to absorb x-rays and protect underlying regions of the inter-scintillator regions. The x-ray
7297037 Ceramic discharge chamber for a discharge lamp November 20, 2007
A ceramic discharge chamber for a lamp, according to an exemplary embodiment of the invention, comprises a first member which includes a leg portion and a transition portion, wherein the leg portion and the transition portion are integrally formed as one piece from a ceramic material
7252789 High-density scintillators for imaging system and method of making same August 7, 2007
A scintillator composition comprising a garnet represented by (M.sub.1-x-yN.sub.xA.sub.y).sub.3(Al.sub.5-a-bC.sub.aD.sub.b)O.sub.12, where M comprises yttrium, or terbium, or gadolinium, or holmium, or erbium, or thulium, or ytterbium, or lutetium, or combinations thereof, where N co
7141794 Scintillator compositions, related processes, and articles of manufacture November 28, 2006
A scintillator composition of a halide perovskite material of at least one ABX.sub.3 type halide perovskite, at least one activator for the matrix material and optionally at least one charge compensator to assist the incorporation of the activator in the perovskite lattice and any reacti
7138901 Temperature measuring device and system and method incorporating the same November 21, 2006
A system having a heat source, a component coupled to the heat source, and at least one thermistor coupled to the component and adapted to monitor temperature of the component, wherein the thermistor has a core-shell microstructure having a shell disposed about a core, the core comprisin
7098460 Monolithic structure for x-ray CT collimator August 29, 2006
A conversion device for use in an imaging system is provided. The conversion device includes a first perforated plate portion forming a plurality of collimator channels separated by a plurality of thin collimator walls. A second perforated plate portion forming a plurality of scintil
6982126 Thermal barrier coating January 3, 2006
A thermal barrier coating (TBC) for a component intended for use in a hostile thermal environment. The TBC has an interior region and an outer surface region on and contacting the interior region. Both regions are formed of a ceramic material, with the interior region having a lower
6936009 Matching layer having gradient in impedance for ultrasound transducers August 30, 2005
A matching layer for ultrasound transducers has a gradient in impedance value from one surface to the other surface of the matching layer. The matching layer is composed of a plurality of sublayers made of composite materials and securely attached together and is disposed on the surface
6887588 Article protected by thermal barrier coating having a sintering inhibitor, and its fabrication May 3, 2005
An article protected by a thermal barrier coating system includes a substrate having a substrate surface, and a thermal barrier coating system overlying the substrate. The thermal barrier coating system has a thermal barrier coating formed of a thermal barrier coating material arranged a
6822374 Multilayer piezoelectric structure with uniform electric field November 23, 2004
An ultrasound transducer element incorporates material of low dielectric constant to confine the electric field of a stack of piezoelectric ceramic layers. Edge segments made of material having a low dielectric constant and extending in the thickness direction are formed at opposing ends
6815648 Contact sensor arrangements for glass-ceramic cooktop appliances November 9, 2004
A glass-ceramic cooktop appliance having at least one burner assembly disposed under a glass-ceramic plate. The cooktop appliance includes a sensor assembly having a support bar mounted on the burner assembly adjacent to the glass-ceramic plate and one or more devices for sensing coo
6811760 Inorganic acicular bodies and method for producing same November 2, 2004
Acicular bodies of a metal compound are produced by slowly precipitating an organic salt of the metal from a solution of an ester of a dicarboxylic acid having 1-5 carbon atoms and firing the precipitate in an oxidizing atmosphere. These acicular bodies have a cross-sectional dimension l
6791266 Ceramic discharge chamber for a discharge lamp September 14, 2004
A ceramic discharge chamber for a lamp, according to an exemplary embodiment of the invention, comprises a first member which includes a leg portion and a transition portion, wherein the leg portion and the transition portion are integrally formed as one piece from a ceramic material
6706212 Cerium-doped alkaline-earth hafnium oxide scintillators having improved transparency and method March 16, 2004
Cerium-doped alkaline-earth hafnium oxide scintillator compositions have at least one alkaline earth metal selected from the group consisting of Ba, Sr, Ca, and combinations thereof. The scintillator compositions can be formed into a shape having porosity less than about 0.05 percent for
6583563 Ceramic discharge chamber for a discharge lamp June 24, 2003
A ceramic discharge chamber for a lamp, according to an exemplary embodiment of the invention, comprises a first member which includes a leg portion and a transition portion, wherein the leg portion and the transition portion are integrally formed as one piece from a ceramic material
6519313 High-Z cast reflector compositions and method of manufacture February 11, 2003
A scintillator pack comprises an array of scintillator pixels and an x-ray absorbing layer disposed in inter-scintillator regions between the scintillator pixels. The x-ray absorbing layer acts to absorb x-rays and protect underlying regions of the inter-scintillator regions. The x-ray
6361735 Composite ceramic article and method of making March 26, 2002
The invention relates to a method of forming a composite article comprising the steps of forming a plurality of green ceramic elements, wherein the green ceramic elements are arranged side by side, and the green ceramic elements are spaced from each other by gaps; filling the gaps with a
6335078 Curable masking material for protecting a passage hole in a substrate January 1, 2002
A curable masking material for protecting a passage hole in a metal-based substrate is formed of an extrudable resin composition. The resin composition is thermally stable at elevated temperatures, and does not serve as an adhesion site for any coatings which are applied over the mas
6242520 Flame retardant polymer compositions with coated boron phosphate June 5, 2001
Polymer compositions comprising polysiloxanes and metal coated boron phosphates are described and they unexpectedly display flame retardant properties and hydrolytic stability without creating environmental hazards.
5905269 Enhanced infrared energy reflecting composition and method of manufacture May 18, 1999
An infrared energy reflecting enamel composition comprises a ground coat of enamel on a substrate and embedded TiO.sub.2 particles in the ground coat of enamel. The infrared reflecting enamel composition has an infrared energy reflectivity value of at least 80%. A method for manufacturin
5902647 Method for protecting passage holes in a metal-based substrate from becoming obstructed, and rel May 11, 1999
A method for temporarily protecting at least one passage hole in a metal-based substrate from being obstructed by at least one coating applied over the substrate is disclosed. The method includes the following steps:(a) filling and covering the hole with a curable masking material which
5898180 Infrared energy reflecting composition and method of manufacture April 27, 1999
An infrared energy cooking and heating apparatus comprises an infrared layer or reflective coating, particularly on inner panels of ovens or other cooking devices. The coating is preferably an enamel and reflects the infrared energy to the food being cooked and heated. In particular,
5834880 Multilayer array ultrasonic transducers November 10, 1998
A method for fabricating "1.5D" and "2D" multilayer ultrasonic transducer arrays employs dicing saw kerfs, which provide acoustic isolation between rows. The kerfs are metallized to provide electrical connection between surface electrode layers and buried internal electrode layers. A
5753198 Hot coal gas desulfurization May 19, 1998
A method of fuel gas desulfurization comprises the steps of introducing fuel, such as coal, into a gasifier, heating the fuel in the gasifier to a temperature so as to form a gaseous fuel mixture containing sulfur compounds, and conveying the gaseous fuel mixture over a sulfur absorbing
5704105 Method of manufacturing multilayer array ultrasonic transducers January 6, 1998
A method for fabricating "1.5D" and "2D" multilayer ultrasonic transducer arrays employs dicing saw kerfs, which provide acoustic isolation between rows. The kerfs are metallized to provide electrical connection between surface electrode layers and buried internal electrode layers. A
5693700 Flame retardant polymer compositions December 2, 1997
A metal borate, metal phosphate or metal borophosphate in combination with either a metal sulfide or sulfur polysiloxanes are incorporated into polymer systems to produce a polymer composition which unexpectedly displays flame retardant properties without creating environmental hazar
5660877 Method for fabricating lamellar piezoelectric preform and composite August 26, 1997
A process for fabricating a fully dense ceramic preform for a piezoelectric or electrostrictive composite exhibiting anisotropic 3--3 connectivity. The process involves preparing a homogeneous slurry of a piezoelectric ceramic powder, a binder, dispersant, and a liquid medium. The slurry
5644085 High density integrated ultrasonic phased array transducer and a method for making July 1, 1997
The present invention discloses a high density integrated ultrasonic phased array transducer and method for making. The high density integrated ultrasonic phased array includes a backfill material having an array of holes formed therein. Each of the holes are separated a predetermined










 
 
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