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:
May. 22, 2012
Filed:
Jul. 21, 2006
Toshiyuki Hokii, Kitakyushu, JP;
Hiroyuki Fuchimoto, Kitakyushu, JP;
Toshihiro Suruga, Kitakyushu, JP;
Jyouki Yoshitomi, Kitakyushu, JP;
Keisuke Asano, Kitakyushu, JP;
Toshiyuki Hokii, Kitakyushu, JP;
Hiroyuki Fuchimoto, Kitakyushu, JP;
Toshihiro Suruga, Kitakyushu, JP;
Jyouki Yoshitomi, Kitakyushu, JP;
Keisuke Asano, Kitakyushu, JP;
Krosaki Harima Corporation, Kitakyushu-shi, JP;
Abstract
A configuration in which particles of pitchhaving a softening point in the range of 70 to 200° C. and a diameter equal to or smaller than 30 μm are held on the surfaces of particles of a refractory raw materialhaving a diameter equal to or smaller than 50 μm is employed. This pitch-containing refractory raw materialcan be used with the pitch being in a fine-particle form without any aggregation even after the long-term storage. Using it as a part of a raw material formulation allows the fine particles of pitch to be uniformly dispersed during the mixing or kneading process. The resulting carbon-containing refractory has an excellent corrosion resistance. It also provides suppressed increase in the Young's modulus while maintaining the level of strength, thereby being excellent in thermal spalling resistance even with the carbon content ratio being low.