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:
May. 05, 2026
Filed:
Sep. 03, 2022
William W. Wallace, North Dighton, MA (US);
Hippolyte A. Grappe, Oak Ridge, TN (US);
Felix L. Paulauskas, Knoxville, TN (US);
H. Felix Wu, Frederick, MD (US);
Truman Bonds, Knoxville, TN (US);
William W. Wallace, North Dighton, MA (US);
Hippolyte A. Grappe, Oak Ridge, TN (US);
Felix L. Paulauskas, Knoxville, TN (US);
H. Felix Wu, Frederick, MD (US);
Truman Bonds, Knoxville, TN (US);
Abstract
An apparatus and method for the low temperature carbonization of a continuous tow of polymeric material fiber, such as PAN or other carbon fiber precursor materials at atmospheric pressure in an inert gas (usually nitrogen or argon) is disclosed. A pair of antennas are arranged within an electromagnetic cavity and face each other in an edgewise fashion for direct electromagnetic heating of the fiber tow as it passes between them. Supplemental background heating increases the dielectric loss of the fiber tow in order to improve absorption of electromagnetic energy and prevent arcing. The invention produces a higher density low temperature carbonized fiber in a shorter residence time compared to conventional low temperature carbonization.