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:
Sep. 12, 2017
Filed:
Nov. 05, 2013
Graftech International Holdings Inc., Independence, OH (US);
Bassam Alnasleh, Parma Heights, OH (US);
Ching-Feng Chang, Strongsville, OH (US);
Omer Gul, Olmsted Falls, OH (US);
Andrew Hausner, Parma Heights, OH (US);
Robert Miller, Southaven, MS (US);
Orest Adrianowycz, Broadview Heights, OH (US);
GrafTech International Holdings Inc., Brooklyn Heights, OH (US);
Abstract
A method of making a carbon fiber comprising esterification of a lignin precursor with an acid, acid anhydride, or acyl halide, thereby forming a reduced Tlignin. Mixing the reduced Tlignin with a carbon residue selected from the group of coal based raw material, petroleum based raw material and combinations thereof, thereby forming a fiber precursor mixture; and spinning the fiber precursor mixture into a fiber. A method of making a carbon fiber comprising esterification of a lignin with an acid derivative, thereby forming a reduced Tlignin. Mixing the reduced Tlignin with a pitch, thereby forming a fiber precursor mixture; and spinning the fiber precursor mixture into a fiber. A method of making a carbon fiber comprising lowering the Tof a lignin material, thereby forming a reduced Tlignin. Mixing the reduced Tlignin with a carbon residue, thereby forming a fiber precursor mixture and spinning the fiber precursor mixture into a fiber.