2015-05-042015-05-041993-07-13Smalley, Richard E. and Haufler, Robert E., "Electric arc process for making fullerenes." Patent US5227038A. issued 1993-07-13. Retrieved from https://hdl.handle.net/1911/79820.https://hdl.handle.net/1911/79820This invention provides a method of generating fullerenes by vaporizing carbon with the heat from an electrical arc and then condensing a soot from which fullerenes may be recovered.10 ppengUtility patentUS5227038A