国家/地区 美国（4） 日本（2） 韩国（2）
IPC部 C（6）
IPC大类 C01（6）
IPC小类 C01B（6） D01F（5） C08F（2）
C10B（2） C10C（2） C10G（2）
G01N（2）
IPC C01B032/05（6）
发明人 ATKINS C A（2） LINDEMANN G W（2） TARGETT M（2）
公开年 2021（6）
申请年 2020（3）  2021（2） 
专利权人 CARBON HOLDI.（2）

Producing graphene or carbon fiber involves extracting coal sample from location, performing spectral analysis on coal sample to detect hydrogen to carbon ratio of coal sample, concentration of contaminant in coal sample.

TARGETT M, LINDEMANN G W, ATKINS C A

Pitch-based ultrafine carbon fiber comprises specific nitrogen atom content measured by X-ray photoelectron spectroscopy, and has specified average fiber diameter and true density.

YAGI K, KOMURA S, HIRAKAWA R

Producing a carbon and sulfur complex having hierarchical structure for lithium-sulfur battery electrode comprises reducing carbon dioxide-containing gas in presence of reducing agent e.g. magnesium, mixing sulfur and heat-treating.

LEE J, PARKJAEHYUN, KIM H S

Preparing carbon fibers used in article involves converting coal to low-softening point carbon pitch, extruding the pitch into carbon fibers, adding graphite/graphene sheath to the carbon fibers and calcining the carbon fibers, in which the pitch has high oxygen content.

STILLER A H

Electromagnetic wave absorbing material used for removing electromagnetic wave noise, is prepared by covering surface of carbon material with carbon nanostructure having graphene, and carbon nanostructure does not contain metal element.

FURUBAYASHI H, MORI M, IKEDA T, KANO S

Producing reduced graphene oxide from coal by thermally processing coal, oxidizing thermally processed coal to form coal oxide, and forming reduced graphene oxide comprising impurity atoms from coal oxide.

ATKINS C A, LINDEMANN G W, TARGETT M