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:
Jun. 20, 2017
Filed:
Aug. 20, 2013
Graftech International Holdings Inc., Parma, OH (US);
Ching-Feng Chang, Strongsville, OH (US);
Bassam Alnasleh, Parma Heights, OH (US);
Omer Gul, Olmsted Falls, OH (US);
Robert E Miller, Southhaven, MS (US);
Andrew Hausner, Parma Heights, OH (US);
Orest L Adrianowycz, Broadview Heights, OH (US);
Chong Chen, Broadview Heights, OH (US);
Brian Paul Askey, Parma Heights, OH (US);
GrafTech International Holdings Inc., Parma, OH (US);
Abstract
A method of making a carbon fiber includes heat treating a lignin precursor absent an active ingredient in an inert atmosphere to raise the glass transition temperature (Tg) of the precursor by at least five (5%) percent, forming a lignin precursor having an increased Tg (High Tg Lignin). The High Tg Lignin can be spun into a fiber. The fiber may then be stabilized to form a thermoset fiber. The time period for stabilizing the fiber is less than one hundred (100) hours.