Process of isolating carbon nanotubes from a mixture containing carbon nanotubes and graphite particles
Patent 5560898 Issued on October 1, 1996. Estimated Expiration Date: 
August 1, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 1, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesProcess for separating mineral wool fibers from nonfibrous materials Uncapped and thinned carbon nanotubes and process Patent #: 5346683 InventorsAssigneeApplicationNo. 283508 filed on 08/01/1994US Classes:423/461, Recovery or purification423/445B, Fullerene (e.g., C60, C70, etc.)423/447.2ProductExaminersPrimary: Lewis, MichaelAssistant: DiMauro, P. T. Attorney, Agent or FirmInternational ClassesD01F 009/12C01B 031/02 Foreign Application Priority Data1993-08-04 JPAbstractCarbon nanotubes are isolated from a mixture containing the carbon nanotubes and graphite particles by a process including the steps of:finely pulverizing the mixture;dispersing the pulverized product in a liquid medium;centrifuging the resulting dispersion to obtain a supernatant containing carbon nanotubes and graphite particles having a particle size of 0.3 μm or less;separating the supernatant into a solid phase and a liquid phase; andcalcining the solid phase in an oxygen-containing atmosphere at a temperature sufficient to burn the graphite particles and to leave the nanotubes.Other References
|
| ||||||||||||||
