US 12,312,711 B2
High strength and high modulus carbon fibers
Satish Kumar, Atlanta, GA (US); Han Gi Chae, Atlanta, GA (US); Bradley A. Newcomb, Atlanta, GA (US); Prabhakar V. Gulgunje, Atlanta, GA (US); Yaodong Liu, Atlanta, GA (US); Kishor K. Gupta, Atlanta, GA (US); and Manjeshwar G. Kamath, Atlanta, GA (US)
Assigned to Georgia Tech Research Corporation, Atlanta, GA (US)
Filed by Georgia Tech Research Corporation, Atlanta, GA (US)
Filed on Sep. 27, 2023, as Appl. No. 18/373,557.
Application 18/373,557 is a continuation of application No. 16/984,273, filed on Aug. 4, 2020, granted, now 11,773,514.
Application 16/984,273 is a continuation of application No. 15/514,300, abandoned, previously published as PCT/US2015/054529, filed on Oct. 7, 2015.
Claims priority of provisional application 62/061,327, filed on Oct. 8, 2014.
Prior Publication US 2024/0026575 A1, Jan. 25, 2024
Int. Cl. D01F 1/09 (2006.01); C08L 33/20 (2006.01); D01F 9/22 (2006.01); D02G 3/02 (2006.01); D02G 3/16 (2006.01)
CPC D01F 9/225 (2013.01) [C08L 33/20 (2013.01); D01F 1/09 (2013.01); D01F 9/22 (2013.01); D02G 3/02 (2013.01); D02G 3/16 (2013.01); D10B 2101/12 (2013.01); D10B 2401/063 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A plurality of carbon fibers arranged in a tow of no more than 100 carbon fibers in which each of the carbon fibers consists of a polyacrylonitrile-based material and that is characterized as having a fiber tensile strength that is at least 5.6 GPa, a fiber tensile modulus that is at least 350 GPa, and an effective diameter that is at least 5.1 μm and having an oxidative thermal degradation temperature of at least 815° C., wherein the fibers in the tow are without any surface treatment and without any sizing.