Solar process for making fullerenes
Patent 5556517 Issued on September 17, 1996. Estimated Expiration Date: 
June 7, 2015. 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.
June 7, 2015. 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 ReferencesSolar furnace Electric arc process for making fullerenes 5236470 InventorAssigneeApplicationNo. 483045 filed on 06/07/1995US Classes:204/157.47, Carbon containing product produced423/445BFullerene (e.g., C60, C70, etc.)ExaminersPrimary: Lewis, MichaelAssistant: DiMauro, Peter Attorney, Agent or FirmForeign Patent References
International ClassC01B 031/02AbstractThis invention provides an improved process and apparatus for making fullerenes by vaporizing carbon and conducting the resulting carbon vapor to a dark zone for fullerene growth and annealing. In one embodiment concentrated solar energy is used to vaporize carbon. In a further embodiment, concentrated solar energy may be used to improve fullerene yields by vaporizing carbon and further to prevent carbon cluster formation until the carbon vapor passes into a dark zone for fullerene growth and annealing. The invention provides an improvement to increase the yield of any known process wherein carbon is vaporized under high light conditions, the improvement comprising providing a dark zone for fullerene growth and annealing.Other References
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