The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2023
Filed:
Oct. 22, 2021
Carbon Fiber Recycling, Llc, Tazewell, TN (US);
Douglas D. Griffin, II, Tazewell, TN (US);
Carbon Fiber Recycling, LLC, Tazewell, TN (US);
Abstract
A method and apparatus for obtaining carbon fiber from carbon fiber waste (e.g., pre-preg and CFP waste). The method and apparatus selects, or is controlled to select, between using an oxygen free pyrolytic process to volatilize the epoxy resin or other matrix in which the fibers are held to liberate the fibers therefrom and, depending upon the type of pre-preg waste, using a reactor environment where the reactor atmosphere has about 1% to about 2% oxygen by volume. The reactor has a counterflow such that the carbon fibers are moved in one direction and the off gasses are moved in the opposite direction. A combination of steam at the reactor outlet and vacuum pressure at the reactor inlet create the counter flow.