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| Number | Title | Issue Date |
| 6354799 | Superalloy weld composition and repaired turbine engine component A solid-solution strengthened superalloy weld composition, includes: about 10 to about 15 wt % Co; about 18 to about 22 wt % Cr; about 0.5 to about 1.3 wt % Al; about 3.5 to about 4.5 wt % Ta; about 1 to about 2 wt % Mo; about 13.5 to about 17.0 wt % W, up to about 0.08... | 03/12/2002 |
| 6333394 | Copolycarbonate preparation by solid state polymerization Copolycarbonates containing such structural units as birefringence-reducing or "soft block" units are prepared by conducting a reaction, such as melt polymerization or equilibration, between a precursor polycarbonate and a monomer, polycarbonate oligomer ... | 12/25/2001 |
| 6309441 | Reduction-melting process to form rare earth-transition metal alloys and the alloys Rare earth alloy compositions, such as the neodymium iron boron (NdFeB) alloy are made by a Reduction-Melting process. The Reduction-Melting process comprises preparing a primary electrode containing at least one compound or metal to be reduced to form a ... | 10/30/2001 |
| 6307004 | Method for parallel melt-polymerization In an exemplary embodiment, the method includes the steps of providing an array of reaction vessels and providing a plurality of homogenous reaction mixtures within the reaction vessels. Each mixture comprises monomers at least partially embodied in a liq... | 10/23/2001 |
| 6306517 | Thermal barrier coatings having an improved columnar microstructure An article having a spallation resistant TBC comprises a metal substrate, such as a high temperature superalloy, and a TBC, such as a coating of yttria stabilized zirconia. The TBC comprises a plurality of plasma-sprayed layers. The TBC has a coherent, co... | 10/23/2001 |
| 6302649 | Superalloy weld composition and repaired turbine engine component A solid-solution strengthened superalloy weld composition, includes: about 0 to about 10 wt % Co; about 18 to about 22 wt % Cr; about 0.2 to about 0.7 wt % Al; about 15 to about 28 wt % of the sum of refractory elements; up to about 0.09 wt % C; up to about 0.06 wt % Zr... | 10/16/2001 |
| 6298113 | Self aligning inter-scintillator reflector x-ray damage shield and method of manufacture A scintillator pack including an x-ray damage shield. The scintillator pack has an array of scintillator pixels. A scintillation light reflecting layer that reflects scintillation light from the pixels is included at least between the scintillator pixels ... | 10/02/2001 |
| 6294261 | Method for smoothing the surface of a protective coating A method for smoothing the surface of a ceramic-based protective coating which exhibits roughness is disclosed. The method includes the steps of applying a ceramic-based slurry or gel coating to the protective coating surface; heating the slurry/gel coati... | 09/25/2001 |
| 6295309 | Vacuum arc remelting apparatus and process A VAR process is conducted in an apparatus characterized by a crucible wall that provides a stable shelf anchor. The VAR apparatus includes a furnace chamber, a consumable electrode formed of a material to be remelted within the furnace chamber and a cruc... | 09/25/2001 |
| 6291631 | Melt polycarbonate catalyst systems This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts which are salts of macrocyclic polypyrroles with the general formula Ax+y [(Porphine-Tm)By-x ] or Ax | 09/18/2001 |
| 6289258 | Drain flowrate measurement The flowrate of a stream discharged from a drain in a vessel is measured by imaging the stream, measuring a diameter of the stream image, and calculating the flowrate based on the measured diameter. A video camera may be aimed below the drain for imaging ... | 09/11/2001 |
| 6287644 | Continuously-graded bond coat and method of manufacture A continuously-graded bond coat comprises a gradient of at least one material characteristic value. The gradient extends from a first material characteristic value at a first surface region to a second material characteristic value at a second surface reg... | 09/11/2001 |
| 6278756 | Electrochemical corrosion potential sensor with increased lifetime The invention relates to a sensor for a measuring an electrochemical corrosion potential comprising a sensor tip, a conductor electrically connected to the sensor tip, an insulating member which surrounds the conductor, a connecting member which surrounds... | 08/21/2001 |
| 6276433 | Liquid metal cooled directional solidification process A liquid metal cooled directional solidification process provides improved solidification characteristics at the solidification front. In the process, a mold is filled with molten metal; and a solidification interface is caused to pass through the molten ... | 08/21/2001 |
| 6268461 | Method for preparing hydroxyaromatic chloroformates This invention relates to a process for the preparation of hydroxyaromatic chloroformate products suitable for use as chainstopping or endcapping agents. The process involves a semi-batch process in which an aqueous caustic solution is introduced into a v... | 07/31/2001 |
| 6267902 | Process for removing a coating from a hole in a metal substrate A method of removing a coating from the surface of a hole in a metal-based substrate is described. The coating is scored on or near the surface of the hole. The substrate is then treated with a coating-removal solution under conditions suitable for removi... | 07/31/2001 |
| 6264766 | Roughened bond coats for a thermal barrier coating system and method for producing A roughened bond coat comprises a screen that includes interwoven wires defining openings and a metallic material disposed on the screen. The screen and metallic material form a roughened bond coat possessing an uneven, undulated, and irregular surface. T... | 07/24/2001 |
| 6265689 | Method of underwater cladding using a powder-fan plasma torch A plasma arc torch includes a housing having a nozzle at one end with a central orifice. An electrode extends into the orifice for producing a plasma arc. A port is disposed in the nozzle adjacent the orifice for injecting powder into the arc. The port in... | 07/24/2001 |
| 6263045 | High reflectivity cathode cups for x-ray tube applications A x-ray tube comprises a cathode cup assembly. The cathode cup assembly comprises a filament positioned in a cathode cup. A surface of the cathode cup assembly is exposed to incident infrared radiation, and the surface is adapted to reflect a substantial ... | 07/17/2001 |
| 6261643 | Protected thermal barrier coating composite with multiple coatings A composite that protects thermal barrier coatings from the deleterious effects of environmental contaminants at operational temperatures is discovered. The thermal barrier coated parts have least two outer protective coatings that decrease infiltration o... | 07/17/2001 |
| 6259758 | Catalytic hydrogen peroxide decomposer in water-cooled reactors A metal cooling tube of a water-cooled nuclear reactor, having an inner surface thereof exposed to an aqueous cooling medium containing hydrogen peroxide. The cooling tube has its inner surface coated with matter selected from the group consisting of the ... | 07/10/2001 |
| 6258737 | Article and method for making complex shaped preform and silicon carbide composite by melt infiltration Small diameter silicon carbide-containing fibers are provided in a bundle such as a fiber tow that can be formed into a structure where the radii of curvature is not limited to 10-20 inches. An aspect of this invention is directed to impregnating the bund... | 07/10/2001 |
| 6256376 | Composite x-ray target An X-ray tube anode comprises a graphite ring, a target substrate applied onto the graphite ring and a target focal track applied onto the target substrate. The target focal track comprises a first refractory metal and the target substrate comprises a sec... | 07/03/2001 |
| 6255435 | Method of crystallizing polycarbonate prepolymer A method of crystallizing an aromatic polycarbonate prepolymer having a molecular weight of from about 1,000 to about 20,000 and having from about 5 to about 95 mole % aryl carbonate terminal end groups, based on total end groups, the method comprising ef... | 07/03/2001 |
| 6254341 | Engine having resistance to particle deposits An engine, according to an exemplary embodiment of the invention, comprises a compressor which compresses inlet air; a combustor in which a mixture of fuel and air is combusted; a turbine which is driven by gases from the combustor; and a dielectric coati... | 07/03/2001 |
| 6256190 | Ultracapacitor electroyte The invention relates to an ultracapacitor and to a method of making an ultracapacitor. The ultracapacitor of the invention includes two solid, nonporous current collectors, two porous electrodes separating the collectors, a porous separator between the e... | 07/03/2001 |
| 6253115 | System for implementing a design for six sigma process A system for implementing a design for six sigma process having a plurality of sub-processes each having a plurality of sub-steps. The system includes an independent main application for implementing the design for six sigma process. A series of independe... | 06/26/2001 |
| 6250522 | Systems for flow control in electroslag refining process A system for controlling the flow rate of the stream from an electroslag refining apparatus is taught. The system includes the introduction of unrefined metal into an electroslag refining process in which the unrefined metal is first melted at the upper s... | 06/26/2001 |
| 6252035 | Salts of chelating agents as polymerization catalysts The present invention relates to a method for the preparation of polycarbonate comprising preparing a polycarbonate by a melt process by reacting a diphenol and a diaryl carbonate in the presence of a catalytically effective amount of one or more alkali a... | 06/26/2001 |
| 6248859 | Polycarbonates suitable for use in optical article The invention relates to polycarbonates comprising: (a) carbonate structural units corresponding to structure (I) ##STR1## where R1, R2, R3, and R4 are independently selected from the group consisting of C1 | 06/19/2001 |
| 6234755 | Method for improving the cooling effectiveness of a gaseous coolant stream, and related articles of manufacture A method is described for improving the cooling effectiveness of a fluid which flows through a row of passage holes in a substrate (e.g., a turbine component), out to a high-temperature surface of the substrate. The method involves forming a slot over the... | 05/22/2001 |
| 6228973 | Method for preparing high molecular weight polycarbonate A method of preparing polycarbonate by the melt process comprising the steps of: a) melting a dihydric phenol and a diester of carbonic acid for a time and at a temperature sufficient to form a melt; and thereafter introducing a catalyst composition compr... | 05/08/2001 |
| 6222001 | Method of crystallizing polycarbonate prepolymer The invention relates to a method of crystallizing an aromatic polycarbonate prepolymer having a molecular weight of from about 1,000 to about 20,000 and having from about 5 to about 95 mole % aryl carbonate terminal end groups, based on total end groups,... | 04/24/2001 |
| 6222002 | Method for preparing polycarbonates by oxidative carbonylation Polycarbonate oligomers are prepared by oxidative carbonylation of a dihydroxyaromatic compound such as bisphenol A in the presence of a catalyst comprising a Group VIII metal such as palladium, an inorganic and/or an organic co-catalyst, a halide source ... | 04/24/2001 |
| 6217286 | Unidirectionally solidified cast article and method of making A cast superalloy article having a unidirectional crystal structure that is substantially defect free with primary dendrite arm spacing greater than 150 μm is provided. The unidirectional crystalline microstructure comprises a longitudinal columnar struc... | 04/17/2001 |
| 6215014 | Catalyst composition and method for producing diaryl carbonates Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a Group VIIIB metal, preferably palladium; an alkali metal or alkaline earth metal halide, preferably sodium bromide;... | 04/10/2001 |
| 6214248 | Method of forming hollow channels within a component A method of forming an internal channel within an article, such as a cooling channel in an air-cooled blade, vane, shroud, combustor or duct of a gas turbine engine. The method generally entails forming a substrate to have a groove recessed in its surface... | 04/10/2001 |
| 6214235 | Process for removal of quaternary ammonium salt The present invention relates to a process to remove quaternary ammonium salt (QS), from brine solution. The process uses an adsorbent selected from the group consisting of activated carbon and pyrolyzed sulfonated polystyrene divinylbenzene resin, or mix... | 04/10/2001 |
| 6215015 | Catalyst composition and method for producing diaryl carbonates, using bisphosphines Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a Group VIIIB metal, preferably palladium; an iodide salt, preferably sodium iodide; and at least one organic bisphos... | 04/10/2001 |
| 6212062 | Sealed ultracapacitor A multilayer cell is provided having two solid, nonporous current collectors, two porous electrodes separating the current collectors, a porous separator between the electrodes and an electrolyte occupying pores in the electrodes and separator. A thermopl... | 04/03/2001 |
