| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 423447700 | In specific atmosphere (other than vacuum or air) | 9 |
| 20080213162 | Amplification of Carbon Nanotubes Via Seeded-Growth Methods - The present invention is directed towards methods (processes) of providing large quantities of carbon nanotubes (CNTs) of defined diameter and chirality (i.e., precise populations). In such processes, CNT seeds of a pre-selected diameter and chirality are grown to many (e.g., hundreds) times their original length. This is optionally followed by cycling some of the newly grown material back as seed material for regrowth. Thus, the present invention provides for the large-scale production of precise populations of CNTs, the precise composition of such populations capable of being optimized for a particular application (e.g., hydrogen storage). The present invention is also directed to complexes of CNTs and transition metal catalyst precurors, such complexes typically being formed en route to forming CNT seeds. | 09-04-2008 |
| 20080305031 | System and Method For Producing Carbon Nanotubes - A system for producing carbon nanotubes includes a reaction chamber in which a process is performed for producing a carbon nanotube on a synthetic substrate; a station part disposed at one side of the reaction chamber and provided with a first transporter for loading/unloading the synthetic substrate to/from the reaction chamber; a first transporter installed inside the station part for loading/unloading synthetic substrates to/from the reaction chamber; a substrate accommodating part in which a substrate to be loaded to the reaction chamber is accommodated or a synthetic substrate unloaded from the reaction chamber waits; a retrieve part for drawing out a synthetic substrate from the substrate accommodating part to retrieve a carbon nanotube produced on the synthetic substrate; a catalyst coating unit configured for coating a synthetic substrate with a catalyst before the synthetic substrate is accommodated in the substrate accommodating part of the station part; and a second transporter for transporting a synthetic substrate between the retrieve part and the substrate accommodating part and between the catalyst coating unit and the substrate accommodating part. | 12-11-2008 |
| 20090117026 | Method for manufacturing carbon nano-tube - A method for manufacturing a carbon nano-tube by a chemical vapor deposition includes: introducing a carbon source gas into a reaction chamber; growing the carbon nano-tube by using a catalyser; and maintaining a pressure of the carbon source gas in the reaction chamber in a range between 1.0 Torr and 2.0 Torr so that the carbon nano-tube is formed. Since the pressure is maintained in a range between 1.0 Torr and 2.0 Torr, the catalyser is not caulked. Thus, the carbon nano-tube is stably formed. | 05-07-2009 |
| 20100296996 | METHOD OF MANUFACTURING CARBON NANOTUBES - A method for manufacturing carbon nanotubes includes the steps of: preparing metal-containing-nanofibers which include nanofibers made of organic polymer and metal which possesses a catalytic function in forming carbon nanotubes; and forming carbon nanotubes which contain metal therein by using the nanofibers as a carbon source, wherein the carbon nanotubes are formed by putting the metal-containing-nanofibers into a heating vessel which has a substance capable of converting electromagnetic energy into heat, and by heating the metal-containing-nanofibers using heat which is generated by the heating vessel when electromagnetic energy is applied to the heating vessel. | 11-25-2010 |
| 20110008240 | Process and Apparatus for Producing Carbon Nanotube, Carbon Nanotube Fiber, and the Like - A chemical vapor deposition (CVD) device is equipped with a reaction vessel tube and a small vessel substrate in an electric furnace and with a heater and a thermocouple at the periphery thereof. A gas supply portion is connected to one of the reaction vessel tubes, and a pressure adjusting valve and an exhaust portion are connected to the other of the reaction vessel tubes, controlled by a control section such that the exhaust portion vacuum-exhausts the reaction vessel tube interior, the heater sublimates the small vessel substrate interior by rising temperature of catalyst iron chloride, and the gas supply portion bleeds an acetylene gas into the reaction vessel tube. As a result, iron chloride and the acetylene gas vapor-phase-react, a silicon oxide surface layer is formed to form growth nucleus of cabon nanotubes, and carbon nanotubes are grown so as to be oriented vertically. | 01-13-2011 |
| 20110033367 | METHOD FOR PRODUCTION OF CARBON NANOSTRUCTURES - A process for the production of carbon nanostructures by an oxidation-reduction method is described. The growth of carbon nanorods, nanotubes, and nanoclusters on planar and non planar substrates, and free standing is demonstrated. In one embodiment a reactive gas is generated in situ and reacted with a carbide while the byproducts are removed, thereby adjusting the equilibrium to favor the formation of the carbon nanostructured product. | 02-10-2011 |
| 20130028830 | ENHANCEMENT OF THE STRUCTURE AND PROPERTIES OF CARBON NANOTUBE FIBRES AND FILMS - A method of increasing the density of carbon nanotube fibres or films containing carbon nanotubes to at least 50% w/w, said method including the steps of exposing the fibre or film to suitable density enhancing agent. | 01-31-2013 |
| 20150321919 | SYSTEM AND METHOD FOR PRODUCING CARBON NANOFIBERS VIA RADIO-FREQUENCY INDUCTION HEATING - An apparatus and method for carbonizing or activating carbon nanofibers, or both carbonizing and activating carbon nanofibers, using separate heating of nanofibers and process gases for increased sample temperature response to reduce production costs and improve process control. In one embodiment, the system includes a reactor tube into which a selected atmosphere can be introduced and which is closed at the ends by flanges. Samples are placed inside the tube on or in a susceptor, which is heated by RF induction via RF coils surrounding the reactor tube, and process gases, which can be independently heated, flow through the tube. | 11-12-2015 |
| 20160160396 | CONTINUOUS CARBONIZATION PROCESS AND SYSTEM FOR PRODUCING CARBON FIBERS - A continuous carbonization method for the carbonization of a continuous, oxidized polyacrylonitrile (PAN) precursor fiber, wherein the precursor fiber exiting the carbonization system is a carbonized fiber which has been exposed to an atmosphere comprising 5% or less, preferably 0.1% or less, more preferably 0%, by volume of oxygen during its passage from a high temperature furnace to the next high temperature furnace. In one embodiment, the carbonization system includes a pre-carbonization furnace, a carbonization furnace, a substantially air-tight chamber between the furnaces, and a drive stand carrying a plurality of drive rollers that are enclosed by the air-tight chamber. | 06-09-2016 |
