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:
Jul. 03, 2007
Filed:
Feb. 19, 2004
Hirofumi Takikawa, Aichi, JP;
Youhei Fujimura, Aichi, JP;
Shigeo Itoh, Chiba, JP;
Futaba Corporation, Chiba, JP;
Abstract
A carbon substance comprises a structure and line-shaped bodies, the structure having a size ranging from about 1 μm to about 100 μm and including carbon and a metal or a metallic oxide, and the line-shaped bodies having diameters smaller than about 200 nm and including carbon as a main component thereof and growing radially from a surface of the structure. A method for manufacturing the carbon substance uses a thermal decomposition of a source gas containing carbon in the vicinity of a catalyst, wherein the catalyst comprises a first and a second materials, the first material being Ni or a Ni oxide and the second material being In or an In oxide; and the thermal decomposition is performed at a temperature ranging from about 675° C. to about 750° C. An electron emission element uses the carbon substance as an electron emission material. A composite material includes the carbon substance in its matrix.