EP1243678-A2  ENDO M ET AL: "Pyrolytic carbon nanotubes from vapor-grown carbon fibers" CARBON, ELSEVIER SCIENCE PUBLISHING, NEW YORK, NY, US, vol. 33, no. 7, 1995, pages 873-881, XP004022501 ISSN: 0008-6223;  TERRONES H ET AL: "Graphitic cones in palladium catalysed carbon nanofibres" CHEMICAL PHYSICS LETTERS, vol. 343, 3 August 2001 (2001-08-03), pages 241-250, XP002230244;  ENDO M ET AL: "Structural characterization of cup-stacked nanofibers with an entirely hollow core" APPLIED PHYSICS LETTERS, vol. 80, no. 7, 18 February 2002 (2002-02-18), pages 1267-1269, XP002230243US7048904-B2  Endo et al., "Structural characterizaton of cup-stacked-type nanofibers with an entirely hollow core", Applied Physics Letters, vol. 80, No. 7, Feb. 18, 2002, pp. 1267-1269.;  H. Terrones et al., "Graphitic Cones in Palladium Catalysed Carbon Nanofibres", Chemical Physics Letters, vol. 343, pp. 241-250, 2001.;  Kim et al., "Effect of ball milling on morphology of cup-stacked carbon nanotubes", Chemical Physics Letters, Mar. 2002.;  Morinobu Endo et al., "Pyrolytic Carbon Nanotubes From Vapor-Grown Carbon Fibers", Carbon, vol. 33. No. 7, pp. 873-881, 1995.;  U.S. Appl. No. 10/098,103, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,312, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,351, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,375, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,379, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,396, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,440, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,461, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,522, filed Mar. 18, 2002, Yanagisawa et al.;  U.S. Appl. No. 10/098,570, filed Mar. 18, 2002, Yanagisawa et al.EP1243678-B1  ENDO M ET AL: "Pyrolytic carbon nanotubes from vapor-grown carbon fibers" CARBON, ELSEVIER SCIENCE PUBLISHING, NEW YORK, NY, US, vol. 33, no. 7, 1995, pages 873-881, XP004022501 ISSN: 0008-6223;  ENDO M ET AL: "Structural characterization of cup-stacked nanofibers with an entirely hollow core" APPLIED PHYSICS LETTERS, vol. 80, no. 7, 18 February 2002 (2002-02-18), pages 1267-1269, XP002230243;  TERRONES H ET AL: "Graphitic cones in palladium catalysed carbon nanofibres" CHEMICAL PHYSICS LETTERS, vol. 343, 3 August 2001 (2001-08-03), pages 241-250, XP002230244