Patents Represented by Attorney Charles E. Bricker
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Patent number: 6541161Abstract: An electrolyte for an electrochemical cell consisting of a di-lithium phthalocyanine.Type: GrantFiled: September 10, 2001Date of Patent: April 1, 2003Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Lawrence G. Scanlon, Jr.
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Patent number: 6437081Abstract: Oxyallyl pendent polymer system having repeating units of the formulae hereinafter referred to as structure A, wherein x has a value of about 0.1 to 1.0 and y has a value of 1.0-x, and hereinafter referred to as structure B, wherein the sum of p+q has a value of about 0.1 to 1.0, r has a value of 1.0-(p+q) and the molar ratio of p:q is about 9:1 to 1:9, wherein Bz is a benzazole unit selected from the group consisting of wherein X is —O—, —S— or —NH—, and R is selected from the group consisting of and wherein Ar is an aromatic group.Type: GrantFiled: February 13, 2001Date of Patent: August 20, 2002Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Thuy D. Dang, Robert J. Spry, Max D. Alexander
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Patent number: 6432683Abstract: A method for the preparation of 2-aminomuconate which comprises adding 2-aminophenol to a mixture of 2-aminophenol 1,6-dioxygenase, 2-aminomuconic semialdehyde dehydrogenase and NAD+ (nicotinamide adenine dinucleotide, oxidized form) in a buffer, and recovering a fraction containing 2-aminomuconate from the mixture.Type: GrantFiled: September 18, 2000Date of Patent: August 13, 2002Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Zhongqi He, Jim C. Spain
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Patent number: 6392009Abstract: Benzobisazole polymers having repeating units of the formula wherein Z is wherein X is —S—, —O— or —NH—.Type: GrantFiled: February 13, 2001Date of Patent: May 21, 2002Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Thuy D. Dang, Narayanan Venkatasubramanian
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Patent number: 6362313Abstract: Allyl pendent benzazole polymer system having repeating units of the formula: wherein Bz is a benzazole unit selected from the group consisting of wherein X is —O—, —S— or —NH—, and R is selected from the group consisting of wherein Ar is an aromatic group; and wherein x has a value of about 1.0 to 0.1 and y has a value of 1.0−x.Type: GrantFiled: February 13, 2001Date of Patent: March 26, 2002Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Fred E. Arnold, Thuy D. Dang
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Patent number: 6359149Abstract: Provided are novel, electropolymerizable monomers of the formulae: wherein R1,R2 and R3 are selected from the group consisting of —H, —O(CH2)nCH3, wherein n has a value of 0 to 11 and m has a value of 1 to 4, and wherein no more than one of R2 and R3 is —H. Also provided are polymers resulting from the electropolymerization of these monomers.Type: GrantFiled: February 2, 2000Date of Patent: March 19, 2002Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, Balasubramanian Sankaran
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Patent number: 6355765Abstract: A wholly aromatic copolyester having repeating units of the formula: wherein Ar1 is wherein Q is selected from the group consisting of —H, —CH3, —CF3, —Cl, —Br, and —C6H5; wherein Ar2 is selected from the group consisting of wherein X is selected from the group consisting of —Br, —Cl, —CH3 and —C6H5; wherein Ar3 is wherein Ar4 is selected from the group consisting of wherein m has a value of 0.05 to 0.95 and n has a value of 100-m, is characterized by accessible nematic-isotropic transition temperatures providing outstanding orientational order and mechanical properties.Type: GrantFiled: September 25, 2000Date of Patent: March 12, 2002Assignee: United States of America as represented by the Secretary of the Air ForceInventors: Patrick T. Mather, Devdatt S. Nagvekar, Hong G. Jeon, Loon-Seng Tan
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Patent number: 6340398Abstract: A method for enhancing the oxidation resistance of substrates fabricated from metallic molybdenum and alloys containing at least 50% molybdenum which comprises depositing silicon on the surface of the substrate under conditions which cause the formation of an outer layer of MoSi2. Also disclosed is a method for enhancing the oxidation resistance of other substrates, such as carbon-carbon and metals and alloys which show minimal reaction with molybdenum under the coating conditions, which comprises depositing a layer of molybdenum on the surface, then depositing silicon on the molybdenum layer under conditions which cause the formation of an outer layer of MoSi2.Type: GrantFiled: April 4, 2000Date of Patent: January 22, 2002Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Triplicane A. Parthasarathy, Madan G. Mendiratta, Dennis M. Dimiduk
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Patent number: 6326337Abstract: An oxidation-corrosion additive for enhancing the stability of PFPAEs which has the formula: wherein Q is —Rf or —S—Rf, Rf is a perfluoroalkyl or perfluoroalkylether group having 1 to 30 carbon atoms, x and y are integers, each having a value of 0-5, wherein the sum of x and y is in the range of 1 to 10. In the formula above, Rf may be linear or branched. The additive can be a single component or a mixture of components varying in the number and relative positions of x and y. The additive can be used alone or with other suitable additives in PFPAE base fluids.Type: GrantFiled: April 4, 2001Date of Patent: December 4, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Kalathil C. Eapen, Grace J. Chen, Wayne E. Ward, Harvey L. Paige
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Patent number: 6326196Abstract: The cell line HeLa is transformed with the chromosomal insertion of the plasmid pSV2neoNR101, ATCC No. 69617. The transformed cells, HeLaNR1, produce diazoluminomelanin (DALM) intra cellularly when provided with nitrate, luminol and 3-amino-L-tyrosine•HC1 (3AT). The modified cells can be used to study mechanisms for radiofrequency and light radiation interactions with carcinoma of the cervix. The effects of drugs, hormones, and cytokines that affect the expression of nitric oxide synthase and its activity can also be studied to understand the effects of these materials on cervix cells.Type: GrantFiled: January 22, 2001Date of Patent: December 4, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Jill E. Parker, Johnathan L. Kiel
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Patent number: 6309703Abstract: This invention is a rapid low-cost technique for manufacturing thick high-performance carbon and ceramic composites in the form of uniformly densified near-net shaped structures. This is accomplished by impregnating composite preforms with low-viscosity wetting monomers which undergo polymerization followed by pyrolysis reactions in the preform ultimately creating ceramic and/or carbon matrices. Since the monomers possess low-molecular-weight they have low viscosities. Thus, if they wet the fiber and partially-densified preform they can easily impregnate even the smallest pores. Once inside the preforms, polymerization of the monomers is then initiated, resulting in a liquid matrix-precursor of the high molecular weight needed to produce a superior matrix (upon pyrolysis) with high efficiency.Type: GrantFiled: June 8, 1998Date of Patent: October 30, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Phillip G. Wapner, Wesley P. Hoffman, Steven Jones
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Patent number: 6300502Abstract: Provided are chromophores with very large two-photon absorption cross-sections. One group of these chromophores has the formula: (T—Q)n—N—Phm wherein Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-3 and m has a value of 3−n, and wherein T is wherein R1 and R2 are alkyl groups having 1 to 20 carbon atoms, provided that when Q is a single bond, the value of n is 2 or 3. Another group of these chromophores has the formula: (T—Q)n—G—Phm wherein T is as defined above, Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-4 and m has a value of 4−n, and wherein G is a 4-arm core unit. Yet another group of these chromophores has the formula: (T—Q)n—G—Phm wherein T is as described previously, Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-6 and m has a value of 6−n, and wherein G is a 6-arm core unit.Type: GrantFiled: December 8, 2000Date of Patent: October 9, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Ramamurthi Kannan, Bruce A. Reinhardt, Loon-Seng Tan
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Patent number: 6291621Abstract: Provided are novel, electropolymerizable monomers of the formulae: wherein R1, R2 and R3 are selected from the group consisting of —H, —O(CH2)nCH3, wherein n has a value of 0 to 11 and m has a value of 1 to 4, and wherein no more than one of R2 and R3 is —H. Also provided are polymers resulting from the electropolymerization of these monomers.Type: GrantFiled: February 23, 1999Date of Patent: September 18, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, Balasubramanian Sankaran
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Patent number: 6291537Abstract: Controlled and thorough stabilization of pitch is provided by incorporating an oxidant into the pitch. In one embodiment of the invention, the oxidant is intimately mixed with the pitch. In another embodiment, the oxidant is encapsulated in a suitable encapsulant and the encapsulated oxidant is intimately mixed with the pitch. This material is particularly useful in the preparation of a carbon-carbon composite, but is also useful for preparing fibers and solid preforms.Type: GrantFiled: March 28, 2000Date of Patent: September 18, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: David L. Ciminelli, Partha P. Paul, Niraj Vasishtha
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Patent number: 6251815Abstract: A thermal gradient resistant fiber-reinforced composite structure which has a hot operating side and an opposite cool operating side and a thickness &tgr; therebetween. In one embodiment, the composite has two regions: hot and cool. The hot region consists essentially of a fiber having a first coefficient of thermal expansion and a matrix material and the cool region consists essentially of a fiber having a second coefficient of thermal expansion and a matrix material. In this embodiment, the hot region has a thickness &tgr;H of about 10 to 90 percent of the total thickness &tgr; between the hot side and the cool side, and the cool region has a thickness &tgr;C of about 90 to 10 percent of the total thickness &tgr;. In a second embodiment, the composite has a hot operating side and an opposite cool operating side and a thickness &tgr;′ therebetween. In this embodiment, the composite has three regions: hot, intermediate and cool.Type: GrantFiled: January 18, 2000Date of Patent: June 26, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Triplicane A. Parthasarathy, Ronald J. Kerans
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Patent number: 6248580Abstract: Dinitrotoluene present as a contaminant in a sample, is degraded by the steps of (a) providing a sample comprising dinitrotoluene; (b) adding to the sample at least one bacterial strain capable of degrading at least one dinitrotoluene isomer under aerobic conditions; (c) producing aerobic conditions in the sample; and (d) maintaining the aerobic conditions in the sample for a time that is sufficient for the bacteria to degrade said dinitrotoluene. In one embodiment, at least one bacterial strain capable of degrading the 2,4-dinitrotoluene isomer under aerobic conditions is added to the sample. In another embodiment, at least one bacterial strain capable of degrading the 2,6-dinitrotoluene isomer under aerobic conditions is added to the sample. In yet another embodiment, at least one bacterial strain capable of degrading both the 2,4-dinitrotoluene isomer and the 2,6-dinitrotoluene isomer under aerobic conditions is added to the sample.Type: GrantFiled: December 23, 1998Date of Patent: June 19, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Jim C. Spain, Shirley F. Nishino, Urs Lendenmann
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Patent number: 6221942Abstract: A carbon-rich zirconia-silica sol is prepared by the steps of dissolving zirconyl nitrate hydrate in absolute ethanol, mixing the solution thus obtained with a silicon alkoxide, and mixing the latter solution with a polyelectrolyte. The resulting carbon-rich sol/polyelectrolyte mixture can be employed to coat continuous fiber tow or filaments, to make nanosized zircon powder and to make a porous zircon membrane material.Type: GrantFiled: August 23, 1999Date of Patent: April 24, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Emmanuel E. Boakye, Randall S. Hay, Triplicane A. Parthasarathy, M. Dennis Petry
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Patent number: 6218344Abstract: Lubricants for satellite applications consist essentially of a base fluid having low volatility and a minor amount, i.e., about 0.1 to 10 weight percent, of a chlorinated tris(phenoxyphenyl)phosphate.Type: GrantFiled: January 21, 2000Date of Patent: April 17, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Lois J. Gschwender, Carl E. Snyder, Jr.
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Patent number: H1988Abstract: Methods are presented to produce duplex (DP) microstructures, nearly lamellar (NL) microstructures, and fully TMT lamellar (TMTL) microstructures in gamma titanium aluminide alloy articles. The key step for obtaining a specific type of microstructure is the post-hot work annealing treatment at a temperature in a specific range for the desired microstructure. The annealing temperatures range from Te+100° C. to T&agr;−25° C. for duplex (DP) microstructures, from T&agr;−25° C. to T&agr;−5° C. for nearly lamellar (NL) microstructures, and from T&agr; to T&agr;+60° C. for fully TMT lamellar (TMTL) microstructures, where Te is the titanium-aluminum eutectoid temperature of the alloy and T&agr; is the alpha transus temperature of the alloy. The times required for producing specific microstructures range from 2 min to 15 hours depending on microstructural type, alloy composition, annealing temperature selected, material section size, and desired grain-size.Type: GrantFiled: June 30, 1998Date of Patent: September 4, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Young-Won Kim, Dennis M. Dimiduk
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Patent number: H2006Abstract: A method for repairing scratches, dings, gouges or other minor imperfections in finishes applied by flame spraying, fluidized bed, hot flocking, electrostatic spray or electrostatic fluidized bed, which comprises dissolving a coating material in a suitable solvent, applying the resulting solution to a selected area, evaporating the solvent, and, optionally, curing the coating material.Type: GrantFiled: January 21, 2000Date of Patent: November 6, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: David F. Ellicks