Patents Represented by Attorney, Agent or Law Firm Noreen C. Johnson
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Patent number: 6583362Abstract: A multi-filament superconducting wire in which the filaments comprise zirconia-stabilized ultra-fine grain Nb3Sn. The superconducting wire is formed by wire-drawing a preform comprising a metallic matrix and at least one niobium alloy rod having zirconium and oxygen in solid solution and heat treating the drawn wire in the presence of tin to yield at least one continuous filament comprising ultra-fine grain Nb3Sn having semi-coherent ZrO2 precipitates disposed therein. The ZrO2 precipitates serve to stabilize the ultra-fine grain microstructure of the Nb3Sn at temperatures up to 1100° C. and allows Nb3Sn to maintain the ultra-fine grain microstructure when heat treated at temperatures that are greater than those previously used. By using higher temperatures to form Nb3Sn, the time required for heat treatment can be significantly reduced.Type: GrantFiled: November 5, 2001Date of Patent: June 24, 2003Assignee: General Electric CompanyInventors: Mark Gilbert Benz, Theodore McCall Evenden, Judson Sloan Marte, Thomas Robert Raber
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Patent number: 6583258Abstract: The present invention relates to a synthetic method in which one or more diaryl carbonates is reacted with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of organic phosphates in combination with tetraalkylammonium or tetraalkylphosphonium compounds which serve as co-catalysts. The organic phosphate derivative adenosine 5′-monophosphate disodium salt was shown to possess excellent activity as a transesterifcation catalyst for the preparation of polycarbonate under melt polymerization conditions.Type: GrantFiled: October 25, 2001Date of Patent: June 24, 2003Assignee: General Electric CompanyInventors: John Patrick Lemmon, Ronald James Wroczynski
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Patent number: 6580097Abstract: The invention relates to a light source comprising a phosphor composition 14 and a light emitting device 12 such as an LED or a laser diode 32. The phosphor composition 14 absorbs radiation having a first spectrum and emits radiation having a second spectrum and comprises at least one of: YBO3:Ce3+,Tb3+; BaMgAl10O17:Eu2+,Mn2+; (Sr,Ca,Ba)(Al,Ga)2S4:Eu2+; and Y3Al5O12—Ce3+; and at least one of: Y2O2S:Eu3+,Bi3+; YVO4:Eu3+,Bi3+; SrS:Eu2+; SrY2S4:Eu2+; CaLa2S4:Ce3+; and (Ca,Sr)S:Eu2+. The phosphor composition 14 and the light source 12 together can produce white light with pleasing characteristics, such as a color temperature of 3000-6500° K, a color rendering index of about 83-87, and a device luminous efficacy of about 10-20 lumens per watt.Type: GrantFiled: November 22, 2000Date of Patent: June 17, 2003Assignee: General Electric CompanyInventors: Thomas Frederick Soules, William Winder Beers, Alok Mani Srivastava, Lionel Monty Levinson, Anil Raj Duggal
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Patent number: 6576739Abstract: High molecular weight polycarbonates are prepared from hindered bisphenols in a reaction sequence involving conversion of the hindered bisphenol to the corresponding bischloroformate and subsequent treatment with an amine catalyst and aqueous base to effect polymerization by hydrolysis and condensation of the bischloroformate groups. Tertiary aliphatic and cycloaliphatic amine catalysts bearing at least one methyl group are found to be especially effective in promoting this polymerization reaction. Reaction rates and selectivities are shown to be superior to known methods employing tertiary amines lacking methyl groups attached to nitrogen, such as triethylamine. The inclusion of chain stoppers allows the preparation of well defined mixtures of polycarbonate oligomers from hindered bisphenols. Additionally, the methodology may be used to prepare symmetrical diaryl carbonates from hindered phenols.Type: GrantFiled: December 14, 2000Date of Patent: June 10, 2003Assignee: General Electric CompanyInventors: Peter David Phelps, Elliott West Shanklin, Daniel Joseph Brunelle
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Patent number: 6576718Abstract: Powder coating compositions comprising at least one thermosetting resin and at least one poly(phenylene ether) are disclosed.Type: GrantFiled: October 4, 2000Date of Patent: June 10, 2003Assignee: General Electric CompanyInventors: Gary William Yeager, Michael Teruki Takemori
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Patent number: 6572975Abstract: An optically coated article comprising a polymeric substrate, such as aromatic polycarbonate, and a plurality of optical coating layers comprising alternate layers of silicon dioxide and amorphous hydrogenated silicon or variations thereof, produced by plasma enhanced chemical vapor deposition. The article is characterized by essentially constant optical characteristics over a wide temperature range.Type: GrantFiled: August 24, 2001Date of Patent: June 3, 2003Assignee: General Electric CompanyInventor: George Theodore Dalakos
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Patent number: 6572796Abstract: A method of predicting optimal injection molding cycle time includes the steps of performing a thermal analysis through a thickness of a part made using an injection mold, calculating shrinkage as a function of cooling time, calculating friction forces between the part and mold, calculating ejection forces based on the coefficient of friction and the calculated shrinkage calculating the induced stress in selected high stress areas on the part, and comparing the induced stress with material yield stress to determine an optimal cycle time window within which the part can be ejected without being damaged.Type: GrantFiled: October 27, 2000Date of Patent: June 3, 2003Assignee: General Electric CompanyInventors: Dong-Ming Gao, Wit Cezany Bushko
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Patent number: 6573342Abstract: Solid blends of rubbery polymers and amorphous or crystalline polymers, said blends being free-flowing at temperatures lower than the glass transition temperature or crystalline melting temperature of the amorphous or crystalline polymer, are prepared by intimate mixing procedures. In general, said mixing conditions include high shear conditions sufficient to convert polymer A to dispersed particles coated with polymer B and produce a free-flowing powder blend.Type: GrantFiled: February 21, 2002Date of Patent: June 3, 2003Assignee: General Electric CompanyInventors: Navjot Singh, Joseph Michael Anostario
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Patent number: 6572956Abstract: Substantially solvent-free multilayer articles characterized by excellent color retention and gloss retention, solvent resistance and recyclability comprise a substrate layer comprising a first material selected from the group consisting of a metal, ceramic, glass, a cellulosic material, a thermoset resin, and a thermoplastic resin, and a resinous coating layer which comprises resorcinol or alkylresorcinol isophthalate/terephthalate ester units. An intermediate layer may also be present.Type: GrantFiled: August 5, 1999Date of Patent: June 3, 2003Assignee: General Electric CompanyInventors: James Edward Pickett, Randall Lee Carter, Jimmy Lynn Webb, Daniel Robert Olson, Frank Axel Hoefflin, Hua Wang
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Patent number: 6572253Abstract: A method and system are provided that efficiently compound high levels of inorganic filler, processing fluid and silicone polymer at a commercial rate into homogeneous filled and devolatilized silicone compositions. In the method, filled silicone compositions are compounded by compounding a filler, processing fluid and silicone polymer in a first compounding apparatus to produce a first dispersed composition and simultaneously compounding a filler, processing fluid and silicone polymer in a second compounding apparatus that shares a common extruder shaft with the first compounding apparatus to produce a second dispersed composition. The system comprises a first compounding apparatus and a sequential second compounding apparatus that shares a common shaft with the first compounding apparatus.Type: GrantFiled: February 28, 2002Date of Patent: June 3, 2003Assignee: General Electric CompanyInventors: Norberto Silvi, Mark Howard Giammattei
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Patent number: 6569986Abstract: The present invention relates to a synthetic method comprising contacting at least one diaryl carbonate with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of organic polyacids in combination with tetraalkyl ammonium or tetraalkyl phosphonium compounds which serve as co-catalysts. The transesterification catalysts are derived from polyacids containing both CO2H groups and SO3H groups and from polyacids containing exclusively CO2H groups or exclusively SO3H groups. The catalysts employed according to the method of the present invention provide polycarbonates having reduced levels of Fries rearrangement product relative to conventionally employed catalysts such as sodium hydroxide.Type: GrantFiled: October 25, 2001Date of Patent: May 27, 2003Assignee: General Electric CompanyInventors: John Patrick Lemmon, Ronald James Wroczynski, Oltea Puica Siclovan
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Patent number: 6569985Abstract: Polycarbonates having a high level of endcapping and containing a low level of Fries rearrangement product are prepared from dihydroxy aromatic compounds, such as bisphenol A, and diaryl carbonates such as diphenyl carbonate in a two stage process involving a tetraalkyl phosphonium carboxylate catalyzed oligomerization of the reactants in a first reaction stage followed by the addition of an alkali metal hydroxide co-catalyst in the second stage of the polymerization reaction. The late addition of the co-catalyst provides improved polymerization reaction rates as judged by higher polycarbonate molecular weights. The amount of alkali metal hydroxide co-catalyst is small thus avoiding the formation of excessive amounts of Fries product. The method has been used to provide Fries product levels between 200 and 800 parts per million in polycarbonates having Mn values between 7,500 and 8,500 Daltons.Type: GrantFiled: August 8, 2001Date of Patent: May 27, 2003Assignee: General Electric CompanyInventors: Patrick Joseph McCloskey, Alberto Nisoli, Warren William Reilly
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Patent number: 6569929Abstract: The present invention relates to a method for preparing phosphoramides having a glass transition temperature in one embodiment of at least about 0° C., in another embodiment of at least about 10° C., and in still another embodiment of at least about 20° C., the phosphoramides being substantially free of acidic, basic, or halide impurities, or their precursors. The invention also relates to resin compositions comprising at least one thermoplastic resin and at least one phosphoramide having a glass transition temperature of at least about 0° C., wherein the phosphoramide is prepared by the method of the invention.Type: GrantFiled: May 4, 2001Date of Patent: May 27, 2003Assignee: General Electric CompanyInventors: Neal Steven Falcone, John Robert Campbell, James Ross Fishburn
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Patent number: 6565701Abstract: An ultracapacitor comprises two solid, nonporous current collectors, two porous electrodes separating the collectors, a porous separator between the electrodes and an electrolyte occupying the pores in the electrodes and separator. At least one of the current collectors comprises a conductive metal substrate coated with a metal nitride, carbide or boride coating.Type: GrantFiled: July 10, 2000Date of Patent: May 20, 2003Assignee: General Electric CorporationInventors: Elihu Calfin Jerabek, Mati Mikkor
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Patent number: 6566808Abstract: The invention relates to a luminescent display comprising a first electrode, a second electrode, an organic light emitting layer disposed between the first and second electrodes, and a luminescent material which receives light from the organic light emitting layer and converts the light to a different wavelength, wherein the first and second electrodes together define an overlap region in which the organic light emitting layer is activated to emit light, and the luminescent material is disposed in a portion of the overlap region. The invention also relates to a method comprising the steps of creating an image and printing the image on a light emitting device comprising an organic light emitting layer after the light emitting device has been formed. The image may be created, for example on a personal computer, and printed with an inkjet printer. The image may be printed in phosphors which emit light of one wavelength upon absorbing light of a different wavelength from the organic light emitting layer.Type: GrantFiled: December 22, 1999Date of Patent: May 20, 2003Assignee: General Electric CompanyInventors: Anil Raj Duggal, Alok Mani Srivastava
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Patent number: 6567753Abstract: Methods and devices are disclosed for determining barrier properties of at least one barrier coating with respect to a plurality of fluids. These methods and systems include a combination of acoustic wave and optical detection measurements. A dual-response acoustic wave transducer coated with the barrier coating is exposed to one or more of the fluids. The effects on the barrier coating, such as permeation of the fluid or dissolution of the coating, are measured using acoustic wave and optical techniques and the corresponding barrier properties are determined with respect to the fluids.Type: GrantFiled: April 4, 2001Date of Patent: May 20, 2003Assignee: General Electric CompanyInventor: Radislav Alexandrovich Potyrailo
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Patent number: 6566295Abstract: A method and catalyst system for economically producing aromatic carbonates from aromatic hydroxy compounds is disclosed. In one embodiment, the present invention provides a method of carbonylating aromatic hydroxy compounds by contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system that includes an effective amount of at least one Group 8, 9, or 10 metal source; an effective amount of at least one bromide composition; an effective amount of at least one activating organic solvent; an effective amount of a combination of inorganic co-catalysts comprising at least one titanium source and at least one copper source; and an effective amount of at least one base.Type: GrantFiled: November 30, 2000Date of Patent: May 20, 2003Assignee: General Electric CompanyInventors: Kirill Vladimirovich Shalyaev, Grigorii Lev Soloveichik, Bruce Fletcher Johnson
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Patent number: 6566299Abstract: A catalyst system for economically producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the present invention provides a carbonylation catalyst system that includes a catalytic amount of an inorganic co-catalyst containing ytterbium. In various alternative embodiments, the carbonylation catalyst system can include an effective amount of a palladium source and an effective amount of a halide composition. Further alternative embodiments can include catalytic amounts of various inorganic co-catalyst combinations.Type: GrantFiled: June 23, 2000Date of Patent: May 20, 2003Assignee: General Electric CompanyInventors: James Lawrence Spivack, Donald Wayne Whisenhunt, Jr., James Norman Cawse, Grigorii Lev Soloveichik
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Patent number: 6565989Abstract: An airfoil having a melting temperature of at least about 1500° C. and comprising a first piece and a second piece joined by a braze to the first piece. The first piece comprises one of a first niobium-based refractory metal intermetallic composite and a first molybdenum-based refractory metal intermetallic composite, and the second piece comprises one of a second niobium-based refractory metal intermetallic composite and a second molybdenum-based refractory metal intermetallic composite. The braze joining the first piece to the second piece comprises one of germanium and silicon, and one of chromium, titanium, gold, aluminum, palladium, platinum, and nickel. This abstract is submitted in compliance with 37 C.F.R. 1.72(b) with the understanding that it will not be used to interpret or limit the scope of or meaning of the claims.Type: GrantFiled: May 30, 2001Date of Patent: May 20, 2003Assignee: General Electric CompanyInventors: Ji-Cheng Zhao, Melvin Robert Jackson, Bernard Patrick Bewlay
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Patent number: 6565683Abstract: The invention relates to plastic working of metals and alloys, predominantly low-plastic and hard-to-work ones, e.g., nickel-, titanium-, and iron-base high-temperature alloys, and producing billets for parts made by plastic working of said billets. The method comprises thermomechanical processing which is performed beginning with the temperature at which a total content of precipitates or an allotropic modification of the matrix exceeds 7%, followed by a stage-by-stage decrease of the working temperature down to the temperature at which a stable fine-grained microstructure of the material is obtained, with ratio between the grain size of various phases differing by not more than 10 times, the billet under processing undergoes deformation with a 1.2 to 3.9 times change in the billet cross-sectional area. When preparing billets from nickel-base alloys a stage-by-stage decrease of the working temperature is carried out so as to provide a maximum 14% gain in the &ggr;-phase at each stage.Type: GrantFiled: February 14, 2000Date of Patent: May 20, 2003Assignee: General Electric CompanyInventors: Farid Zainullaevich Utyashev, Oscar Akramovich Kaibyshev, Vener Anvarovich Valitov