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| Number | Title | Issue Date |
| 8124045 | Method of selective purification of armchair carbon The present invention provides a method of selectively extracting metallic armchair carbon nanotubes alone from the mixture of carbon nanotubes of mixed chiralities, wherein vacant lattice defects are removed from armchair carbon nanotubes alone using the fact that ... | 02/28/2012 |
| 7790136 | Method for preparing porous fabrics A method for preparing porous fabrics is disclosed. The method includes transporting PAN-based oxidized fabrics to a thermal treatment chamber, which provides multi-pipe to introduce oxygenated gas and oxygenated fluid respectively, by using a plurality set of rolle... | 09/07/2010 |
| 7498013 | Plasma-treated carbon fibrils and method of making same A method of treating carbon fibrils and carbon fibril structures such as assemblages, aggregates and hard porous structures with a plasma to effect an alteration of the surface or structure of the carbon fibril or fibrils. The method can be utilized to functionalize... | 03/03/2009 |
| 7413681 | Process to dewater a soot water slurry obtained in a gasification process A process for partial oxidation of a hydrocarbon gas or liquid, involving the steps of partial oxidation and removal of soot by forming a slurry having water and carbon from the gaseous oxidation product, and separating part of the water from the slurry to obtain a ... | 08/19/2008 |
| 7326605 | Semiconductor carbon nanotubes fabricated by hydrogen functionalization and method for fabricating the same Semiconductor carbon nanotubes functionalized by hydrogen and a method for fabricating the same, wherein the functional hydrogenated semiconductor carbon nanotubes have chemical bonds between carbon and hydrogen atoms. The semiconductor carbon nanotube fabricating m... | 02/05/2008 |
| 7276314 | Lithium metal dispersion in secondary battery anodes The present invention is a secondary battery having a high specific capacity and good cycleability, and that can be used safely. The secondary battery is manufactured to include an anode formed from a host material capable of absorbing and desorbing lithium in an el... | 10/02/2007 |
| 7223376 | Apparatus and method for making carbon fibers A method and apparatus for the carbonization of polyacrylonitrile (PAN) precursor fibers. The apparatus comprises a furnace, or series of furnaces in side-by-side arrangement. Each furnace includes a heater, an air inlet and an air diffusion plate. The fiber is loca... | 05/29/2007 |
| 7090819 | Gas-phase process for purifying single-wall carbon nanotubes and compositions thereof The present invention relates to an all gas-phase process for the purification of single-wall carbon nanotubes and the purified single-wall carbon nanotube material. Known methods of single-wall carbon nanotube production result in a single-wall carbon nanotube prod... | 08/15/2006 |
| 7087207 | Method for forming an array of single-wall carbon nanotubes in an electric field and compositions thereof This invention relates generally to a forming an array of single-wall carbon nanotubes (SWNT) in an electric field and compositions thereof. In one embodiment, a purified bucky paper of single-wall carbon nanotubes is used as the starting material. Upon oxidative tr... | 08/08/2006 |
| 7067051 | Process for producing carbonized product used for producing activated carbon for electrode of electric double-layer capacitor, and organic material for carbonized product To produce a carbonized product used for producing activated carbon for en electrode of an electric double-layer capacitor, a condensed polycyclic aromatic pitch having an optical anisotropic rate Oa in a range of 1%≦Oa≦90% and a softening point Ts in a range of... | 06/27/2006 |
| 7037623 | Nonaqueous secondary battery, method for making negative electrode component therefor, and apparatuses for evaluating and making graphite material for negative electrode component A negative electrode of a nonaqueous secondary battery is formed of a carbonaceous material. The ratio RG=Gs/Gb of the degree of graphitization Gs of the carbonaceous material, determined by a surface-enhanced Raman spectrum, to the degree of graphitization Gb, dete... | 05/02/2006 |
| 7018526 | Carbonized pitch moldings prepared from synthetic mesophase pitch and heat-soaked isotropic pitch The present invention provides carbonized pitch articles and methods for producing the same. Synthetic mesophase pitch is mixed with partially anisotropic pitch, which may be selected from heat-soaked isotropic pitch and heat-soaked mixtures of isotropic pitch and m... | 03/28/2006 |
| 6967014 | Method of obtaining a carbon fiber fabric by continuously carbonizing a cellulose fiber fabric The carbonization of cellulose fiber fabric comprises an initial stage of heat treatment up to 250° C. to 350° C., with a relatively high mean temperature rise speed of 10° C./min to 60° C./min, an intermediate stage up to 350° C. to 500° C. with a lower mean ... | 11/22/2005 |
| 6936565 | Modified carbide and oxycarbide containing catalysts and methods of making and using thereof Compositions including modified carbide-containing nanorods and/or modified oxycarbide-containing nanorods and/or modified carbon nanotubes bearing carbides and oxycarbides and methods of making the same are provided. Rigid porous structures including modified oxyca... | 08/30/2005 |
| 6918849 | Power transmission belt containing chopped carbon fibers An endless power transmission belt having (1) a tension section; (2) a cushion section; and (3) a load-carrying section disposed between the tension section and cushion section; and the belt contai... | 07/19/2005 |
| 6890507 | Ozone treatment of fly ash Carbon-containing fly ash has been treated with optimum amounts of ozone. There is homogenous treatment of the fly ash with ozone and over saturation with ozone is avoided. In a further embodiment of the invention carbon, from various sources is oxygenated to be inc... | 05/10/2005 |
| 6869581 | Hollow graphene sheet structure, electrode structure, process for the production thereof, and device thus produced A hollow graphene sheet structure has at least one pair of hollow graphene sheet materials disposed in a continuous form, in which the adjacent ends of the pair of hollow graphene sheet materials are opposed to each other with a gap. ... | 03/22/2005 |
| 6635199 | Process for producing a precursor fiber bundle and a carbon fiber bundle A separable tow of elongated polymeric filaments comprises a plurality of distinct sub-tows lightly and individually and separably joined, as by light crimping together along their edges or, if uncrimped, joined by presence of moisture, and capable of bei... | 10/21/2003 |
| 6589904 | Activated carbon and method for producing it The present invention provides an activated carbon produced by a process, which includes: activating a carbonaceous material, to obtain an activated carbonaceous material; and contacting the activated carbonaceous material with an acid. Another embodiment of t... | 07/08/2003 |
| 6582588 | High temperature, low oxidation stabilization of pitch fibers The present invention provides a process for thermosetting pitch fibers in reduced times, at low concentrations of oxygen and at higher temperatures than previously possible. Additionally, the present invention provides a pitch fiber which has an oxygen d... | 06/24/2003 |
| 6576212 | Process for the production of carbonized material A process of producing a carbonized material, which includes a step of treating the biomass with a microwave for a period of time sufficient to carbonize an inner region thereof but insufficient to carbonize an outer region thereof, thereby obtaining a pa... | 06/10/2003 |
| 6528036 | Milled carbon fiber and process for producing the same Milled carbon fibers are provided which have a fiber cut surface and a fiber axis intersecting with each other at cross angles, the smaller one thereof being at least 65° on the average. The milled carbon fibers may have a specific surface area as measur... | 03/04/2003 |
| 6527988 | Process of making carbon fiber with sharp ends Carbonaceous fibers having sharp ends and which are useful as an electron-emitting material, for example, in cold-cathode display devices. Carbonaceous fibers having a structure such that planes formed of carbon atoms in a condensed ring structure are con... | 03/04/2003 |
| 6524501 | Pitch fiber bundle and pitch type carbon fiber bundle and method for production thereof This invention provides a pitch fiber bundle for carbon fibers of small size, a carbon fiber bundle, and a method for the production thereof, i.e. a method for the production of carbon fibers of a small size, a pitch fiber bundle, and a carbon fiber bundl... | 02/25/2003 |
| 6514897 | Carbide and oxycarbide based compositions, rigid porous structures including the same, methods of making and using the same The present invention relates to compositions and rigid porous structures that contain nanorods having carbides and/or oxycarbides and methods of making and using such compositions and such rigid porous structures. The compositions and rigid porous struct... | 02/04/2003 |
| 6323160 | Carbon-carbon composite material made from densified carbon foam A carbon-carbon composite material is made by providing an open-celled carbon foam preform, and densifying the preform with carbonaceous material. The open-celled carbon foam preform may be oxygen stabilized prior to carbonization, and the foam preform de... | 11/27/2001 |
| 6303095 | Milled carbon fiber and process for producing the same Milled carbon fibers are provided which have a fiber cut surface and a fiber axis intersecting with each other at cross angles, the smaller one thereof being at least 65° on the average. The milled carbon fibers may have a specific surface area as measur... | 10/16/2001 |
| 6241923 | Process for the production of carbon fibers A process for the production of carbon fibers, including melt-spinning mesophase pitch having an optically anisotropic content of at least 90%, a softening point of 190° C. to 280° C. and a heating weight loss of 0.7% by weight or less at a spinning tem... | 06/05/2001 |
| 6228343 | Method for producing isotropic pitch, activated carbon fibers and carbon materials for non-aqueous secondary battery anodes A method for preparing a modified optically isotropic pitch comprising, preparing a synthetic pitch by reacting a member selected from the group consisting of a conjugated polycyclic hydrocarbon containing a low molecular weight alkyl group or a material ... | 05/08/2001 |
| 6194344 | Process for preparing carbonaceous material carrying ultrafinely dispersed metal A process for the preparation of a high-softening-point pitch rich in mesopores having a softening point measured by temperature gradient method of 150° C. or higher, a weight loss by heating up to 300° C. of 5 wt. % or less and mesopores of 100 mm... | 02/27/2001 |
| 6171696 | Method for producing carbon fiber, carbon fiber, prepreg, and molded article from fiber-reinforced composite material The resent invention provides a carbon fiber which enables a molded article produced from a fiber-reinforced composite material using the carbon fiber to exhibit excellent flexibility and to be freed from defects such as bending. According to the method o... | 01/09/2001 |
| 6156287 | Method for preparing pan-based activated carbon fabrics PAN-based oxidized fabrics are activated by heating at a temperature of 700-1000° C. for 1 minute to 1 hour with the introduction of moisturized carbon dioxide gas. The resulting PAN-based activated fabrics are suitable for use as adsorption materials.... | 12/05/2000 |
| 6123829 | High temperature, low oxidation stabilization of pitch fibers The present invention provides a process for thermosetting pitch fibers in reduced times, at low concentrations of oxygen and at higher temperatures than previously possible. Additionally, the present invention provides a pitch fiber which has an oxygen d... | 09/26/2000 |
| 6077463 | Process for producing graphite material for negative electrode used in lithium secondary battery A process for producing graphite materials for a negative electrode used in a lithium secondary battery which process includes the steps of packing carbon materials having an average particle diameter of 5 to 50 μm in a plurality of boxes, placing the bo... | 06/20/2000 |
| 5994261 | Method of producing activated carbon fiber A pitch-type fiber convertible to an activated carbon fiber is infusiblized with an infusiblizing gas and the infusiblized fiber is activated with an activating gas, such as steam, to produce an activated carbon fiber. The waste gas from the infusiblizing... | 11/30/1999 |
| 5990041 | Mesoporous activated carbon filaments This invention relates to a mesoporous carbon material in the form of filaments having a high surface area. A process is also provided to produce mesoporous carbon material of high surface area. The process comprises drying a carbon material, surface oxid... | 11/23/1999 |
| 5928986 | Method for activating a woven or non-woven textile sheet of continuous carbonized filaments or spun carbonized yarn A method of activating a fiber sheet comprising carbonized filaments or spun carbonized yarn includes causing the sheet to travel horizontally through a furnace including at least one horizontal heat treatment zone in which there is maintained a regular a... | 07/27/1999 |
| 5882621 | Method of preparation of carbon materials for use as electrodes in rechargeable batteries A method of producing carbon materials for use as electrodes in rechargeable batteries. Electrodes prepared from these carbon materials exhibit intercalation efficiencies of .apprxeq.80% for lithium, low irreversible loss of lithium, long cycle life, are ... | 03/16/1999 |
| 5853865 | Treatment of vapor-grown carbon fibers for fiber-polymer matrix composites Vapor-grown carbon fibers from methane produced in globular clumps of individual fibers of about 0.5 to 50 micrometers in length are rendered infiltratable and wettable with molten plastic for composite molding article manufacture by careful ball milling ... | 12/29/1998 |
| 5853429 | Method for converting multidimensional sheet structures consisting of polyacrylonitrile fibres into the thermally stabilized stage Method for converting two-dimensional or three-dimensional sheet structures consisting of polyacrylonitrile fibres or substantially of polyacrylonitrile fibres, such as woven fabrics, layered materials, knitted fabrics, felts, or non-woven fabrics, into t... | 12/29/1998 |
