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:
Dec. 10, 2024
Filed:
Jan. 28, 2022
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Takuya Morishita, Nagakute, JP;
Mitsumasa Matsushita, Nagakute, JP;
Mamiko Narita, Nagakute, JP;
Akira Kunitomo, Nagahama, JP;
Nozomu Shigemitsu, Nissin, JP;
Takanori Tatematsu, Nissin, JP;
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, Nagakute, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A carbon fiber wherein an average fiber diameter of a single fiber is in a range of 3 to 10 μm, and an average value of an intensity ratio (D/G) of a D peak to a G peak in a Raman spectrum in a cross section perpendicular to a fiber axis direction of the single fiber is 0.90 or less in a region inside a circle having a diameter of 1 μm and centered at a center of gravity of the cross section of the single fiber, and is 0.90 or less in a region up to 1 μm inside from an outer periphery of the cross section of the single fiber, wherein the D peak is observed at around 1360 cmand derived from a defect in a graphite structure and the G peak is observed at around 1590 cmand derived from the graphite structure.